The balanced dissociation equation for solid barium hydroxide in aqueous solution is: Ba(OH)2(s) → Ba2+(aq) + 2OH-(aq)
What happens when solid barium hydroxide dissociated in aqueous solution?Strong base barium hydroxide (Ba(OH)2) totally dissociates in water to form barium ions (Ba2+) and hydroxide ions (OH-). One molecule of barium hydroxide splits into two hydroxide ions and one barium ion in this process. The hydroxide ion has a charge of -1 and is opposite to the barium ion, which has a charge of +2. Strong base dissociation in water, where the solid substance entirely dissolves into ions, is exemplified by this process. To demonstrate how the solid barium hydroxide dissolves in water to create ions, the proper phases for each species involved in the reaction are shown.
Learn more about Chemical equations here:
brainly.com/question/30087623
#SPJ1
Hydrogen gas (h2) and oxygen gas (o2) combine. Which change occurs that indicates a release of bond energy?.
The creation of water (H2O), as well as the production of heat and light, signal the release of bond energy when hydrogen gas (H2) combines with oxygen gas (O2).
Bond Energy, commonly referred to as average bond enthalpy or just bond enthalpy, is a measurement that provides information about how strong a chemical bond is. "The average value determined from the bond dissociation enthalpies (in the gaseous phase) of all the chemical bonds of a certain type in a given chemical compound," is how the word "bond energy" is defined by the IUPAC. As a result, the average amount of energy needed to break one of these chemical bonds may be thought of as the bond energy of a chemical bond in a specific molecule.
Learn more about Bond Energy.
brainly.com/question/17514510
#SPJ4
Describe how you would prepare each of the following aqueous solutions, starting with solid KBr: (a) 0.75 L of 1.5 x 10^-2 M KBr, (b) 125g of 0.180m KBr, (c) 1.85 L of a slouotion that is 12.0% KBr by mass (the density of the solution is 1.10 g/mL) (d) a 0.150 M solution of KBr that contains just enough KBr to precipitate 16.0g of AgBr from a solution containing 0.480 mol of AgNO3
Moles of KBr = Mass/Molar mass = 10.5g/119g/mol = 0.088 mol. Now, Molarity=moles of KBrVolume of the solution in liter. M o l a r i t y = m o l e s o f K B r V o l u m e o f t h e s o l u t i o n i n l i t e r .
What is the volume of the solution made when 500 mL of a 2.4 M KCl answer is diluted to a 1.0 M solution?1200 mL will be the closing extent of the solution.
However, seeing that there may be already 500 mL of answer present, you only need to add 700 mL of water to get 1200 mL as your last volume. The answer: seven hundred mL.
What mass of KBr is wanted to produce 300g of a answer that is 3.00% by mass?QUESTION 13 What hundreds of KBr and water are wished to produce 300. g of a solution that is three p.c by using mass? 9.00 g of KBr and 300.
Learn more about solid KBr: here;
https://brainly.com/question/13818836
#SPJ1
A sample of oxygen gas initially at 323 K was heated to 377 K. If the volume of the oxygen gas sample at 377 K is 753.8 mL,
what was its volume at 323 K?
ANSWER : 643.1 mL
STEPS:
V1/T1 = V2/T2
Volume of oxygen gas.
A sample of oxygen gas was initially at a temperature of 323 K.
The sample was heated to a new temperature of 377 K.
The volume of the sample at the new temperature of 377 K is 753.8 mL.
We want to find the volume of the sample at the initial temperature of 323 K.
To solve for the initial volume, we can use the combined gas law:
(V1/T1) = (V2/T2), where:
V1 is the initial volume of the gas
T1 is the initial temperature of the gas
V2 is the final volume of the gas
T2 is the final temperature of the gas
Rearranging the equation to solve for V1, we get: V1 = (V2/T2) x T1
Plugging in the values we know, we get:
V1 = (753.8 mL / 377 K) x 323 K
Solving for V1, we get:
V1 = 643.1 mL
Therefore, the volume of the oxygen gas sample at 323 K is approximately 643.1 mL.
ChatGPT
If we triple the number of moles in the gas vessel at constant pressure what would the new volume be learning module 39 on-ramps chemistry
If we triple the number of moles in the gas vessel at constant pressure, the new volume will be three times the initial volume.
Ideal Gas EquationAccording to Avogadro's law, the volume of a gas is directly proportional to the number of moles of gas present at constant temperature and pressure. Therefore, if we triple the number of moles in the gas vessel while keeping the pressure constant, the new volume will also triple.
More specifically, we can use the following formula to calculate the new volume (V2):
n1/V1 = n2/V2
Rearranging this formula to solve for V2 gives:
V2 = n2 * V1 / n1
Substituting the given values, we have:
n1 = initial number of moles
n2 = 3 * n1 (since we triple the number of moles)
V1 = initial volume
V2 = (3 * n1) * V1 / n1
Simplifying the equation, we have:
V2 = 3 * V1
Therefore, the new volume (V2) will be three times the initial volume (V1) if we triple the number of moles in the gas vessel while keeping the pressure constant.
More on ideal gas problems can be found here: https://brainly.com/question/13438949
#SPJ1
Convert to particles
100 dm3 of Kr**
100 dm3 of Kr is equal to 100,000,000 cm3 of Kr. Since 1 mole of any gas occupies 22.4dm3 at STP.
What is Kr?Kr is the chemical symbol for krypton, a noble gas element found on the periodic table. It has an atomic number of 36 and an atomic mass of 83.80. Krypton is a colorless, odorless, and tasteless gas that is found in trace amounts in the atmosphere. It is used in a variety of applications, including fluorescent lighting, medical imaging, and welding. Krypton is also used in space exploration, where its inert properties make it a useful gas for deep space probes.
then we can calculate the number of moles of Kr present in the given volume:
Number of moles of Kr = 100,000,000 cm3 / 22.4dm3/mol
= 4,467,849.13 moles of Kr
Since 1 mole of Kr contains 6.022 x 10^23 particles, the number of particles of Kr present in the given volume is:
Number of particles of Kr = 4,467,849.13 moles x 6.022 x 1023 particles/mol
= 2.67 x 1026 particles of Kr
To learn more about Kr
https://brainly.com/question/29078505
#SPJ1
Determine the theoretical yield if a 125.0g sample of zinc was used.
Determine the percent yield if 515.6g of product is recovered.
The percent yield is 85%
What is the percent yield?The percent yield is a measure of the efficiency of a chemical reaction, calculated by comparing the actual yield of a reaction to the theoretical yield. The theoretical yield is the amount of product that would be produced if the reaction went to completion, based on stoichiometric calculations using the amounts of reactants and products in the balanced chemical equation.
The reaction equation is;
Zn + I₂ → ZnI₂
Number of moles of Zn = 125.0g/65 g/mol
= 1.9 moles
Since the reaction is 1:1
Mass of the ZnI₂ produced = 1.9 moles * 319 g/mol
= 606.1 g
Thus percent yeild = Actual/Theoretical * 100/1
= 515.6/606.1 * 100/1
= 85%
Learn more about percent yield:https://brainly.com/question/17042787
#SPJ1
Missing parts;
Zinc reacts with iodine in a synthesis reaction. Using a balanced chemical equation for the reaction, determine the percent yield of a 125.0gram sample of zinc was used and 515.6 grams of product is recovered
How many g KCl are produced if 3.3 mol O₂ is produced?
The concept stoichiometry is used here to determine the mass of KClO₃ produced from 3.3 mol of oxygen . The mass of KClO₃ produced is 269.61 g.
What is stoichiometry?
The stoichiometric concept is generally used for the calculations of masses and sometimes the volumes and reactants and products involved in a chemical reaction. The relationship between the amounts of reactants and products can be obtained in a chemical reaction.
The reaction is:
2KCl + 3O₂ → 2KClO₃
The number of moles of KClO₃ formed is:
3.3 mol O₂ × 2 mol KClO₃ / 3 mol O₂ = 2.2 mol KClO₃
The molar mass of KClO₃ = 122.55 g/mol
The mass of KClO₃ = 2.2 mol × 122.55 g/mol = 269.61 g
Thus the mass of KClO₃ formed is 269.61 g.
To know more about stoichiometry, visit;
https://brainly.com/question/19730733
#SPJ9
Your question is incomplete, but most probably your full question was.
How many g KClO₃ are produced if 3.3 mol O₂ is reacted?
If I initially have gas at a pressure of 9.2 atm, a volume of 27.5 liters, and a temperature of 280. K, and then I raise the pressure to 12.8 at and increase the temperature to 400. K, what is the new volume of the gas?
The concept combined gas law is used here to determine the new volume of the gas. The new volume of the gas is 28.23 L.
What is combined gas law?The combined gas law gives the relationship between the pressure, volume and absolute temperature of a fixed quantity of gas. In combined gas law, only the amount of gas is held constant.
The combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law. It is found to be an amalgamation of three previously discovered laws.
The combined gas law is given as:
PV/T = k (Constant)
For two different gases, the law is:
P₁V₁ / T₁ = P₂V₂ / T₂
V₂ = P₁T₂V₁ / P₂T₁
= 9.2 × 400 × 27.5 / 12.8 × 280
= 28.23 L
Thus the new volume of gas is 28.23 L.
To know more about combined gas law, visit;
https://brainly.com/question/30458409
#SPJ9
What volume of water would you need to dissolve 72 grams of salt at 25 degrees Celsius? (show work)
To need 200 milliliters volume of water to dissolve 72 grams of salt at 25°C.
In water at 25 degrees Celsius, what is soluble?All sodium, potassium, and ammonium salts are soluble. All nitrates, acetates and perchlorates are soluble. Every salt of silver, lead, and mercury(I) is insoluble. Iodides, bromides, and chlorides are all soluble in water.
Why does water become liquid at 25 °C?The water molecules are dipolar due to the substantial polarity difference between oxygen and hydrogen. As a result, a hydrogen bond forms between the H and O of nearby water molecules. It is this powerful hydrogen bond, which compacts the water molecules firmly together, that causes water to be a liquid at normal temperature.
To know more about perchlorates visit:-
https://brainly.com/question/13918833
#SPJ1
What volume (in L) of 1.20 M FeCl₂ would be required to obtain 0.850 moles of Cl⁻ ions?
Therefore, the volume of 1.20 M FeCl₂ required to obtain 0.850 moles of Cl⁻ ions is 0.354 L.
What is Moles?
One mole of a substance is defined as the amount of that substance that contains the same number of entities, such as atoms, molecules, or ions, as there are in 12 grams of carbon-12. This number, known as Avogadro's number, is approximately 6.022 x 10²³.
The molecular formula for FeCl₂ shows that it contains 2 chloride ions (Cl⁻) for each FeCl₂ molecule. Therefore, the number of moles of Cl⁻ ions is twice the number of moles of FeCl₂.
Given that we want to obtain 0.850 moles of Cl⁻ ions, we can calculate the number of moles of FeCl₂ required as follows:
moles of FeCl₂ = 0.850 moles Cl⁻ ions / 2 = 0.425 moles FeCl₂
To calculate the volume of 1.20 M FeCl₂ required to obtain 0.425 moles, we can use the formula:
moles = concentration (in M) x volume (in L)
Rearranging this formula to solve for volume, we get:
volume (in L) = moles / concentration (in M)
Substituting the values we have, we get:
volume (in L) = 0.425 moles / 1.20 M = 0.354 L
Therefore, the volume of 1.20 M FeCl₂ required to obtain 0.850 moles of Cl⁻ ions is 0.354 L.
Learn more about Moles from given link
https://brainly.com/question/29367909
#SPJ1
need help and explain
Answer:
C. 2:6
Explanation:
This is balanced reaction:
3Mg(NO3)2 + 2K3PO4 => Mg3(PO4)2 + 6KNO3
So 2 K3P04 to 6 KNO3
Can you help me solve number 62?
Light emitted for 100 e⁻ drop from energy level 3 to 2 is 184 photons.
Light emitted for 100 e⁻ drop from energy level 4 to 2 is 118 photons.
How to calculate light in photons?The energy of a photon emitted when an electron drops from energy level n2 to n1 is given by the equation:
E = hc/λ = (Rh c) (1/n₁² - 1/n₂²)
where E is the energy of the emitted photon, h is Planck's constant, c is the speed of light, λ is the wavelength of the emitted light, Rh is the Rydberg constant, and n₁ and n₂ are the initial and final energy levels of the electron.
(a) For a 100 e⁻ drop from energy level 3 to 2:
E = (Rh c) (1/2² - 1/3²) = 0.546 eV
To convert this to joules, use the conversion factor 1 eV = 1.602 x 10⁻¹⁹J:
E = 0.546 eV x (1.602 x 10⁻¹⁹ J/eV) = 8.75 x 10⁻²⁰ J
The energy of one photon is given by E = hc/λ, where h and c are constants and λ is the wavelength of the emitted light. Rearrange this equation to solve for λ:
λ = hc/E
λ = (6.626 x 10⁻³⁴ J s) (3.00 x 10⁸ m/s) / (8.75 x 10⁻²⁰ J) = 2.26 x 10⁻⁷m
The number of photons emitted is equal to the total energy released divided by the energy of one photon:
number of photons = (100 e⁻) x (1.602 x 10⁻¹⁹ J/e⁻) / (8.75 x 10⁻²⁰ J/photon) = 1.84 x 10² photons
Therefore, 184 photons of light are emitted for a 100 e⁻ drop from energy level 3 to 2.
(b) For a 100 e⁻ drop from energy level 4 to 2:
E = (Rh c) (1/2² - 1/4²) = 0.854 eV
Converting to joules:
E = 0.854 eV x (1.602 x 10⁻¹⁹ J/eV) = 1.37 x 10⁻¹⁹J
Calculating the wavelength of the emitted light:
λ = (6.626 x 10⁻³⁴ J s) (3.00 x 10⁸ m/s) / (1.37 x 10⁻¹⁹ J) = 1.44 x 10⁻⁷ m
The number of photons emitted is:
number of photons = (100 e⁻) x (1.602 x 10⁻¹⁹ J/e⁻) / (1.37 x 10⁻¹⁹ J/photon) = 1.18 x 10² photons
Therefore, 118 photons of light are emitted for a 100 e⁻ drop from energy level 4 to 2.
Learn more on photons here: https://brainly.com/question/15946945
#SPJ1
What forces typically hold ions together ?
Ions are atoms or molecules that have an unequal number of protons and electrons, resulting in a net electrical charge. When ions come into close proximity to each other, they can be attracted to or repelled by each other due to electrostatic forces.
There are two main types of electrostatic forces that can hold ions together:
1. Ionic bonds: These are electrostatic forces of attraction between positively charged metal ions and negatively charged non-metal ions. This type of bond typically forms between metal and non-metal ions that have a large difference in electronegativity, resulting in a transfer of electrons from the metal atom to the non-metal atom. The resulting oppositely charged ions are then held together by strong electrostatic forces, forming a stable ionic compound.
2. Electrostatic attraction between oppositely charged ions: This type of electrostatic attraction can occur between any two ions that have opposite charges, regardless of whether they are metals or non-metals. For example, when a positive ion (cation) and a negative ion (anion) are brought close together, they can be attracted to each other by electrostatic forces. The strength of the attraction depends on the charges of the ions and the distance between them.
Overall, the forces that hold ions together are typically electrostatic in nature and are a result of the attraction between opposite charges.
What is the volume of oxygen O2 found in 41.1 grams of oxygen at STP?
Show work please
The volume of oxygen gas found in 41.1 grams at STP is 28.69L.
How to calculate volume at STP?The volume of a gas can be calculated using Avogadro's law equation as follows:
PV = nRT
Where;
P = pressureV = volumen = number of molesR = gas law constantT = temperatureThe number of moles in oxygen gas can be calculated as follows:
moles = 41.1 ÷ 32 = 1.28 moles
At STP;
v = ?p = 1atmR = 0.0821T = 273K1 × V = 1.28 × 0.0821 × 273
V = 28.69L
Learn more about volume at: https://brainly.com/question/12357202
#SPJ1
The volume of oxygen found in 41.1 grams of oxygen at STP is 28.77 L
What is the volume of gases at STP?At Standard Temperature and Pressure (STP), the volume of 1 mole of any ideal gas is 22.4 liters. STP is defined as a temperature of 273.15 K (0°C) and a pressure of 1 atmosphere (atm).
To find the volume of oxygen present in 41.1 grams of O2 at STP, we need to use the following steps:
1 mole of oxygen or 32.0 g has a volume of 22.4 L
41.1 g will have a volume = 41.1/32 * 22.3
The volume of oxygen gas = 28.77 L
Learn more about the volume of gases at STP at: https://brainly.com/question/30560842
#SPJ1
use the conductivity interactive to identify each aqueous solution as a strong electrolyte, weak electrolyte, or nonelectrolyte.
The strong electrolytes are;
NaCl,HCl and NaOH
The weak electrolytes are ammonia
The non electrolyte is sucrose
What is a strong or weak electrolyte?A strong electrolyte is a substance that dissociates completely into ions when it is dissolved in water, meaning that all of the molecules of the substance break apart into their constituent ions. Strong electrolytes include ionic compounds such as sodium chloride (NaCl) and strong acids such as hydrochloric acid (HCl).
In contrast, a weak electrolyte is a substance that only partially dissociates into ions when it is dissolved in water, meaning that only some of the molecules of the substance break apart into their constituent ions. Weak electrolytes include weak acids such as acetic acid (CH3COOH) and weak bases such as ammonia (NH3).
Learn more about electrolyte:https://brainly.com/question/29771118
#SPJ1
Missing parts;
Use the Conductivity interactive to identify each aqueous solution as a strong electrolyte, weak electrolyte, or nonelectrolyte. You are currently in a sorting module. Turn off browse mode or quick nav, Tab to items, Space or Enter to pick up, Tab to move, Space or Enter to drop.
Strong electrolyte Weak electrolyte Nonelectrolyte
NH3 NaCl HCI NaOH C12H22O
Consider the schematic nanostructure depicted below.
Which of the following statements is FALSE regarding this schematic structure?
(Do not extrapolate the field of view. Consider only what you are shown)
.
DO 0000
0
A) One of the phases present features interstitial impurities.
B) The microstructure features exactly two components and two different phases.
C) One grain boundary is depicted.
D) Only one phase boundary is depicted.
E) Each of the phases features a similar concentration of vacancies.
The microstructure features exactly two components and two different phases in the given nanostructure. Therefore, the correct option is option B.
What is phase diagram?Within physical chemistry, engineering, mining, as well as materials science, a phase diagram is a specific kind of diagram that displays the parameters at which thermodynamically different phases arise and coexist at equilibrium.
Lines of equilibrium, also known as phase boundaries, or circumstances under which different phases may coexist at equilibrium, are typical elements of a phase diagram. The microstructure features exactly two components and two different phases in the given nanostructure.
Therefore, the correct option is option B.
To learn more about phase diagram, here:
https://brainly.com/question/16945664
#SPJ1
3 Below is a heating curve for a pure substance. It shows how the temperature rises over time, when the substance is heated until it melts, then boils. Temperature / °C 115- 17 solid liquid gas Time a What is the melting point of the substance? b What happens to the temperature while the substance changes state? c The graph shows that the substance takes longer to boil than to melt. Suggest a reason for this. d How can you tell that the substance is not water? f Sketch a rough heating curve for pure water.
The substance's melting point is 15 °C. A heating curve is a plot as well as graph in which a substance is heated up over time.
What is heating curve?A heating curve is a plot as well as graph in which a substance is heated up over time to determine how much energy it absorbs and how its condition changes as the temperature rises.
(A) The material is in a solid state at point A.
At B, the material has begun to dissolve. It occurs in both solid and liquid forms.
Point C: The material is liquid at this time.
Point D: The stuff has already begun to boil. Both the liquid and gaseous forms of it exist.
(b) The substance's melting point is 15 °C.
(c) The substance's boiling point is 110 °C.
(d) The temperature doesn't change while the state changes.
(e) If the material had been water, it should have had a melting point of 0°C and a boiling point of 100°C. Thus, it is not water.
Therefore, the substance's melting point is 15 °C.
To learn more about heating curve, here:
https://brainly.com/question/27018999
#SPJ9
How many moles of hydrogen (Upper H Subscript 2) are required to completely react with 3 moles of iron oxide (Upper F e Subscript 3 Upper O Subscript 4)?Answer options with 4 optionsA.4 molesB.6 molesC.9 molesD.12 moles
The balanced chemical equation for the reaction of hydrogen with iron oxide is:
3H2 + Fe3O4 -> 4Fe + 4H2O
From the equation, we can see that 3 moles of hydrogen are required to react with 1 mole of iron oxide.
Therefore, to completely react with 3 moles of iron oxide, we need:
3 moles of H2 x (1 mole Fe3O4 / 3 moles H2) = 1 mole Fe3O4
Since 1 mole of Fe3O4 requires 3 moles of H2, we need:
3 moles of H2 x 1 mole Fe3O4 = 3 moles of H2
Therefore, the answer is 3 moles of hydrogen (H2).
give the correct valence for ions of the following elements. drag the appropriate labels to their respective targets.
The correct valence for ions of the following elements are:
Ca: 2+
Cl: 1-
O: 2-
Al: 3+
K: 1+
What is valence?
In chemistry, valence refers to the combining power of an element, which is determined by the number of electrons an atom can lose, gain, or share to form chemical bonds with other atoms. The valence of an element can be used to predict its chemical behavior, including the types of compounds it can form and the way it interacts with other elements.The valence of an element is often represented by a number, which indicates the number of electrons an atom of that element can gain, lose, or share when it reacts with other atoms. For example, the valence of sodium is +1, because it has one electron in its outermost shell that it can lose to form a positively charged ion. The valence of chlorine is -1, because it has one vacancy in its outermost shell that it can fill by gaining an electron from another atom.To know more about valence, click the link given below:
https://brainly.com/question/866518
#SPJ1
A student attempts to identify an unknown compound by the method used in this experiment. She finds that when she heated a sample weighing 0.5032 g the mass barely changed, dropping to 0.3176 g. When the product was converted to chloride, the mass went up, to 0.3502 g. a. Is the sample carbonate? b. What are the two compounds that might be in the unknown?
Answer:
a. To determine if the sample is a carbonate, we need to calculate the theoretical mass loss if the sample were to completely decompose. Carbonates decompose to form the metal oxide and carbon dioxide:
MCO3(s) → MO(s) + CO2(g)
where M is the metal.
The molar mass of CO2 is 44.01 g/mol. The molecular weight of MCO3 is the atomic weight of the metal plus the atomic weight of carbon and 3 times the atomic weight of oxygen. We don't know the identity of the metal in this case, so we can't calculate the exact molecular weight. However, we can use the fact that the mass barely changed upon heating to assume that the mass loss is due to the release of a small amount of CO2, and assume that the rest of the compound remained unchanged. From the data given, the mass loss upon heating is:
0.5032 g - 0.3176 g = 0.1856 g
Assuming that all of this mass loss is due to CO2, we can calculate the theoretical mass loss for a carbonate with a molecular weight of MCO3 as:
(44.01 g/mol) / (MCO3 molecular weight) = 0.1856 g / 0.5032 g/mol
Solving for the molecular weight of MCO3, we get:
MCO3 molecular weight = 168.2 g/mol
This corresponds to the molecular weight of calcium carbonate (CaCO3). Therefore, the sample is likely to be calcium carbonate.
b. If the sample is not a carbonate, then it must be a mixture of two compounds, one of which decomposes upon heating and the other does not. Let's call these compounds A and B, where A is the compound that decomposes upon heating. We can set up a system of equations based on the mass changes:
0.5032 g → 0.3176 g (heating, compound A decomposes)
0.3176 g + x → 0.3502 g (conversion to chloride, compound B forms)
where x is the mass of compound B formed. Solving for x, we get:
x = 0.3502 g - 0.3176 g = 0.0326 g
This means that the mass of compound A before heating is:
0.5032 g - 0.1856 g = 0.3176 g
The mass of compound B before conversion to chloride is:
0.3176 g - 0.0326 g = 0.2850 g
We don't know the identity of compounds A and B, but we can calculate their percentage composition based on their mass and the total mass of the sample (0.5032 g):
% A = (0.3176 g / 0.5032 g) x 100% = 63.06%
% B = (0.2850 g / 0.5032 g) x 100% = 56.61%
These percentages add up to more than 100%, which means that there was likely some measurement error. It is also possible that the two compounds are not pure substances, but mixtures of different compounds. Without more information, we cannot determine the identity of compounds A and B.
According to the activity series, which of these metals will react with most acids to produce H2 gas?
Mg
Li
Hg
When many metals are introduced to a solution containing a potent acid, hydrogen gas is created. Magnesium and zinc are the two most often used materials.
Most hydrogen gas is created in what way?In the United States, the majority of the hydrogen produced each year is created by natural gas reforming with steam. A pressurized gasifier can also produce synthesis gas by combining high-temperature steam, oxygen, and coal or biomass.
HCl and Copper do they react?In the reactivity sequence, copper is placed below hydrogen. This indicates that copper cannot remove hydrogen from the acidic solution because it is less reactive than hydrogen. Copper does not react with hydrochloric acid because of this.
To know more about metals visit:-
brainly.com/question/14072179
#SPJ1
3. How many joules of heat are required to heat 20.5g of tin from 30°C to 230°C (Specific heat of tin = 0.213 J/g °C)
Given that 2h2(g) + o2(g) 2 h2o(l) h = 571. 6 kj/mol c3h4(g) + 4 o2(g) 3 co2(g) + 2 h2o(l) h = 1937 kj/mol c3h8(g) + 5 o2(g) 3 co2(g) + 4 h2o(l) h = 2220. Kj/mol determine the heat of the hydrogenation reaction in kj/mol. C3h4(g) +2h2(g) c3h8(g).
The value enthalpy change (ΔH) is +571.6 kJ/mole. It can be calculated using the concept of Hess's Law.
Hess’s law is defined as the law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps. According to the Hess's law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. It means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.
The expression for the law is,
∆H =∑∆Hr.
The enthalpy change ∆H can be defined as the amount of heat absorbed or released during a reaction. The value can be either negative if the heat was absorbed or positive if the heat was released.
To learn more about Hess's Law
https://brainly.com/question/16795968
#SPJ4
Use the solubility interactive to determine whether a precipitate forms or not when the mystery solution is added to each solution in the table. Solution Result Pb(NO3), Ni(NO), Ba(NO3), Answer Bank no precipitate is formed precipitate is formed The mystery solution is OK.CO OKI OK,SO, OKS OKOH For the chemical reaction HCIO, (aq) + NaOH(aq) + H2O(l) + NaClO,(aq) write the net ionic equation, including the phases. net ionic equation: Which ions are considered spectator ions for this reaction? CIO Он 0 он Na Write the net ionic equation for the acid-base reaction. Include physical states. HI(aq) + KOH(aq) + 4,0(1) + KI(aq) net ionic equation: Alka-Seltzer is marketed as a remedy for stomach problems, such as heartburn or indigestion, and pain relief. It contains aspirin, sodium bicarbonate, and citric acid, and is effervescent when placed in water. Enter the equation for the reaction of one sodium bicarbonate (NaHCO,) molecule with one citric acid (C,H,O,) molecule. Do not include phases. equation: Write the balanced equation for the neutralization reaction between H,SO, and KOH in aqueous solution. Phases are optional. neutralization reaction:
Using the solubility interactive:
When the mystery solution is added to Pb(NO3)2: a precipitate is formed . When the mystery solution is added to Ni(NO3)2: no precipitate is formed .When the mystery solution is added to Ba(NO3)2: a precipitate is formed
Answer Bank:
precipitate is formed for Pb(NO3)2 and Ba(NO3)2, no precipitate is formed for Ni(NO3)2. Therefore, based on the solubility rules, the mystery solution likely contains a sulfate ion (SO4 2-) and an oxide ion (OH-). For the chemical reaction HClO(aq) + NaOH(aq) -> NaClO(aq) + H2O(l) + NaI(aq), the net ionic equation is:
H+ (aq) + OH- (aq) -> H2O(l)
The spectator ions in this reaction are Na+ and Cl-.
The balanced equation for the reaction between one molecule of sodium bicarbonate (NaHCO3) and one molecule of citric acid (C6H8O7) is:
NaHCO3(s) + C6H8O7(s) -> Na3C6H5O7(aq) + H2O(l) + CO2(g)
The neutralization reaction between H2SO4(aq) and KOH(aq) can be written as:
H2SO4(aq) + 2KOH(aq) -> K2SO4(aq) + 2H2O(l)
In this balanced equation, the physical states of the compounds are optional.
To know more about solubility:
brainly.com/question/29661360
#SPJ4
Someone pls help!
Part B: Read each statement below. Explain how each statement describes part of the design, theory, variable, or hypothesis of
an experiment.
17. An educated guess in a psychological experiment that states if a certain thing happens, then it will cause a certain response:
18. A general principle, based on evidence, that certain phenomena are related:
19. The behavioral act that results from a stimulus is a:
20. The stimulus, or that which is affecting what you are studying:
21. That which is being studied in a psychological experiment is the:
22. Selecting individuals from a larger group in such a way that their selection will have no bearing on the experiment:
23. A group identical to or similar to that group which is being studied, is used to compare results:
24. A set of exactly planned procedures for testing a hypothesis:
25. Factors that are manipulated in an experiment:
26. Research method that looks at a few individuals from which to draw conclusions:
27. When psychologists send out questionnaires to many people to gather information:
28. When a group or individual answers questions or behaves in the way they think the experimenter wants them to, this is called:
29. Watching people in their natural habitat is:
30. In a psychological experiment, information is called:
31. A research method in which the experimenter purposely manipulates variables is:
In general, a theory is a well-substantiated explanation or set of principles that describe a phenomenon or a set of related phenomena. A theory is based on a collection of empirical data, observations, and/or experiments and attempts to make sense of those observations by proposing a logical and consistent explanation that can be tested and potentially verified or falsified.
Learn about theory here https://brainly.com/question/24459469
#SPJ1
A flask at room temperature contains exactly equal amounts (in moles) of nitrogen and xenon. Sort the conditions based on the gas described. Gas for which the molecules or atoms have the greatest average velocity.
At the room temperature, the nitrogen molecules in the flask will have the greater average velocity as compared to the xenon gas.
The average velocity of the gas molecules in the flask depends directly upon the temperature. Greater the temperatute, greater is the average velocity of gas molecules. At a particular temperature, the average velocity of gas molecules is directly proportional to the square root of the molar mass of the gas taken.
Since both the gases, nitrogen (N2) and xenon (Xe) are at the same room temperature and contain equal amounts of the gases. The gas with the higher average velocity is the one with the lower molar mass, which is nitrogen (N2) whose molar mass is 28 g/mol. Whereas the molar mass of xenon is greater (131 g/mol).
Therefore, at the temperature of room, the nitrogen molecules in the flask would have a greater average velocity as compared to xenon.
Learn more about molarity :
https://brainly.com/question/8732513
#SPJ4
A student attempts to identify an unknown compound by the method used in this experiment. She finds that when she heated a sample weighing 0.5032 g the mass barely changed, dropping to 0.3176 g. When the product was converted to a chloride, the mass went up, to 0.3502 g. a. Is the sample a carbonate? b. What are the two compounds that might be in the unknown?
a. No, the sample is not carbonate. If it were a carbonate, the mass would have decreased when heated, as carbonates decompose to form carbon dioxide gas and a metal oxide when heated. Since the mass barely changed when the sample was heated, it is not carbonate.
b. The two compounds that might be in the unknown are chloride and a non-chloride compound. When the sample was converted to chloride, the mass increased, indicating that chloride was formed. However, since the mass barely changed when the sample was heated, there must also be a non-chloride compound present that did not decompose when heated.
#SPJ1
Similar Question: https://brainly.com/question/15275329
How much water would you need to add to 550 mL of a 2.5 M KCl solution to make a 1.0 M solution?
Answer with Explanation:
To determine the amount of water needed to dilute a 2.5 M KCl solution to a 1.0 M solution, we can use the dilution formula:
M1V1 = M2V2
where M1 is the initial concentration, V1 is the initial volume, M2 is the final concentration, and V2 is the final volume.
In this case, we know that:
M1 = 2.5 M
V1 = 550 mL
M2 = 1.0 M
We want to find V2, the final volume of the solution, which will be greater than 550 mL due to the addition of water.
Using the dilution formula, we can solve for V2:
M1V1 = M2V2
2.5 M x 550 mL = 1.0 M x V2
V2 = (2.5 M x 550 mL) / 1.0 M
V2 = 1375 mL
Therefore, we would need to add 1375 mL - 550 mL = 825 mL of water to 550 mL of a 2.5 M KCl solution to make a 1.0 M solution.
Question attached Below;
Explanation:
X = liquid
K = 3.97 °C-kg-mol
T f = -0.10 °C
T f' = -1.80 °C
m = 750. g
m (KBr) = ?
The freezing point depression equation is:
ΔT f = K·m·i
where ΔT f is the freezing point depression, K is the freezing point depression constant, m is the molality of the solution, and i is the van't Hoff factor.
Since we are given the mass of liquid X (750 g), we can calculate the molality of the solution:
m = 750/M (X)
where M (X) is the molar mass of X. We are not given this value, so we must assume it to be 100 g/mol.
m = 750/100 = 7.50 mol/kg
We can now use the freezing point depression equation to calculate the mass of KBr:
ΔTf = K·m·i
-1.8 = 3.97·7.50·i
i = -1.8/29.78 = 0.060
The van't Hoff factor for KBr is 2, so the mass of KBr is:
m (KBr) = i/2 = 0.060/2 = 0.030 kg = 30.0 g (to 3 sig. figs.)
Is the following statement true or false? The IR spectroscopy requires lower photon energies to cause transition between levels than microwave spectroscopy. False, the microwave spectroscopy requires less energy to cause transitions since energy levels accessible in microwave spectroscopy are close together. True, the microwave spectroscopy requires more energy to cause transitions since energy levels accessible in microwave spectroscopy are further apart. False, only levels accessible in UV-vis spectroscopy are far apart, all other levels are very close together False, all these transitions are forbidden by selection rules. The presence of repulsion between electrons in multi-electron problem is the reason for a lack of an analytical solution of Schrodinger equation. Numerically this problem can solved by introduction of the following approximation A) separation of nuclear and electronic degrees of freedom B) Bohr atomic model C) assumption that each of the electrons moves in an average field caused by other electrons D) de Brogile formula E) A+C F) B+A G) None of the above
Previo
Answer: True
Explanation: I would explain but it would take 100,000 years