It's possible that the student made an error during the experiment, such as not measuring the volume of water correctly or making a mistake in the calculation. It's also possible that there were external factors that affected the measurement, such as the temperature of the water, the equipment used, or the presence of impurities in the water.
What is Density?
Density is a physical property of matter that describes how much mass is contained in a given volume of a substance. It is calculated by dividing the mass of an object by its volume, and is typically expressed in units such as grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).
In simpler terms, density is a measure of how closely packed the atoms or molecules are within a substance. Substances with a higher density have more mass per unit volume, while substances with a lower density have less mass per unit volume. For example, lead is a dense material with a density of about 11.3 g/cm³, while air is much less dense with a density of about 0.0012 g/cm³ at room temperature and atmospheric pressure.
To determine the cause of the discrepancy, the student could repeat the experiment multiple times to see if the results are consistent, use different methods or equipment to measure the density of water, or compare the results with other published values to see if they are within an acceptable range. It's important for the student to identify and correct any sources of error to ensure the accuracy of their results.
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A typical high-pressure tire on a bicycle might have a volume of 365 mL and a pressure of 7.80 atm at 25 °C. Suppose the rider filled the tire with helium to minimize weight. What is the mass of the helium in the tire?
The mass of helium in the tire is 0.0452 g. To calculate the mass of helium in the tire, we need to use the ideal gas law, which relates the pressure, volume, and temperature of a gas to its number of moles and therefore its mass: PV = nRT
To calculate the mass of helium in the tire, we need to use the ideal gas law, which relates the pressure, volume, and temperature of a gas to its number of moles and therefore its mass:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature.
We know the pressure, volume, and temperature of the helium in the tire, so we can solve for the number of moles of helium:
n = PV/RT
where R = 0.08206 L atm/K mol is the universal gas constant.
Substituting the values given:
n = (7.80 atm) x (0.365 L) / [(0.08206 L atm/K mol) x (25°C + 273.15)]
n = 0.0113 mol
Finally, we can calculate the mass of the helium using the molar mass of helium, which is 4.003 g/mol:
mass = n x molar mass
mass = 0.0113 mol x 4.003 g/mol
mass = 0.0452 g
Therefore, the mass of helium in the tire is 0.0452 g.
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experiment 4: describe what happens when solutions of naoh and nicl2 are combined.
When nickel chloride or sodium hydroxide combine, sodium chloride and a precipitate of nickel hydroxide with a green hue are produced. Although sodium chloride is a colorless aqueous solution.
What is the purpose of nickel chloride?Powder that is golden-yellow is nickel chloride. It is employed in the production of ink and electroplating. Since nickel chloride is subject to OSHA regulation and is mentioned by the ACGIH, DOT, NIOSH, DEP, and EPA, it is listed on the Hazardous Substances List.
Where does NiCl2 come from?A nickel and chloride combination with a 1:2 ratio of nickel to chloride (in the +2 oxidized state). The chemical element NiCl2 stands for nickel(II) chloride, sometimes known as nickel chloride.
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A calcium supplement contains 570 mg of calcium per tablet. Write the equality for this statement. Express your answer using correct number of significant figures.
1 tablet = mg of calcium
A calcium supplement contains 570 mg of the calcium per tablet. The equality for this statement is 610 mg of the calcium = 1 tablet .
The Amount of the calcium present in the calcium supplement is 610 mg per tablet . The Equality statement are obtained is expressed as follows: 610mg of the calcium = 1 tablet
Our body needs calcium to be build and to maintain the strong bones. Our heart, muscles and the nerves also need the calcium to function it properly. When our body calcium intake is insufficient, and our body will remove the calcium from the bones, and making them weak and the brittle.
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what is 26 atomic number?
Answer: Fe (iron)
Explanation:
the whole number next to the symbols on the periodic table that ascend in order by 1 are the atomic numbers, just look for the symbol next to the number 26.
Classify Each Of The Following Substances And Descriptions As An Electrolyte Or A Nonelectrolyte.sodium chloride,Nacl,table sugar, sodium hidroxide,NaOH,
a saluble ionic compound,methanol,CH3OH,potassium iodide,Kl,
most molecular solutes, asubtance that form an aqueous solution that does not conduct electricity
Electrolytes: sodium chloride, potassium iodide, sodium hydroxide.
Nonelectrolytes: table sugar, methanol, and most molecular solutes.
Sodium chloride and potassium iodide are electrolytes because they are soluble ionic compounds that dissociate into ions in solution, allowing them to conduct electricity. Sodium hydroxide is also an electrolyte for the same reason.
Table sugar and methanol are nonelectrolytes because they do not dissociate into ions in solution, meaning they do not conduct electricity.
Overall, the classification of a substance as an electrolyte or nonelectrolyte depends on its ability to dissociate into ions in solution. Electrolytes dissociate into ions, allowing them to conduct electricity, while nonelectrolytes do not dissociate into ions and do not conduct electricity in solution.
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--The complete question is, Classify each of the following substances and descriptions as an electrolyte or a nonelectrolyte.
-most molecular solutes
-sodium chloride, NaCl
-potassium iodine, KI
-table sugar
-methanol, CH3OH
-sodium hydroxide, NaOH
-a substance that forms an aqueous solution that does not conduct electricity
-a soluble ionic compound--
What is the charge of the common ion formed by each of these atoms? Either -2,-1,+1, or +2.
S, Br, I, Li, Sr, Mg, Na, Cs, Ba, F, and O
S: -2 (Sulfur) , Br: -1 (Bromine), I: -1 (Iodine) ,Li: +1 (Lithium) ,Sr: +2 (Strontium) ,Mg: +2 (Magnesium) ,Na: +1 (Sodium) ,Cs: +1 (Cesium), Ba: +2 (Barium) ,F: -1 (Fluorine) ,O: -2 (Oxygen)
What is Magnesium ?Magnesium is an essential mineral found in the human body. It plays an important role in the body, acting as a cofactor in over 300 enzyme systems that regulate diverse biochemical reactions in the body, including protein synthesis, muscle and nerve function, blood glucose levels, and blood pressure regulation. Magnesium is also involved in energy production and metabolism and is necessary for the proper functioning of muscles, nerves, and enzymes. It helps to keep bones strong, maintains normal heart rhythm, and helps to regulate blood sugar and blood pressure levels. Magnesium is found in many foods, including green leafy vegetables, nuts, seeds, and some types of seafood.
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Which of the following is NOT TRUE about simple distillation?
a. The greater the difference in the boiling points of the components, the better the separation.
b. The less volatile component boils first and travels along the condenser.
c. It can be applied to mixtures with components boiling below 150°C.
d. A sand bath can be used in place of a water bath to provide even heating of the flask.
Option - D:The statement that is NOT TRUE about simple distillation is d. A sand bath can be used in place of a water bath to provide even heating of the flask.
Simple distillation involves heating a mixture to evaporate the more volatile component, condensing the vapour, and collecting the purified liquid. As it can sustain a consistent temperature near to the mixture's boiling point, a water bath is frequently utilised to enable uniform heating of the flask. As a sand bath might have hot patches or temperature changes that can impact the separation's quality, it could not deliver as uniform heating. a technique for separating mixes in a boiling liquid combination based on variations in their volatilities. After applying heat to a sample combination, the components are instantly cooled by the action of cold water in a condenser. There are two steps in the distillation refining process.
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what is periodic table atomic mass?
Generally, the atomic mass is defined as a weighted average of all of the isotopes present in that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope.
Atomic number is defined as the number of protons present in the nucleus (which is the same as the number of electrons in the atom). Basically a one or two letter symbol that represents the element. These are internationally-used symbols and abbreviations for the common name or the Latin name of the element.
Generally, the atomic mass is the average number of protons and neutrons in atoms of a chemical elements, which allows for the natural abundances of the element's isotopes.
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what is active ingredient in tylenol?
Acetaminophen, usually referred to as paracetamol, is the substance that makes Tylenol active. It functions as a painkiller and fever reducer by preventing the body's generation of certain molecules that ingredient
A material that is included into the creation of a product or combination is known as an ingredient. An active component in a medicine is the chemical molecule that gives the drug its therapeutic effects. Excipients usually referred to as inactive substances, are added to medications for a number of reasons, including to aid in absorption, enhance flavour or texture, or lengthen shelf life. A drug's purity and quality of components determine its effectiveness and safety. In particular, if you have allergies or are taking other drugs that might interfere with the active or inactive substances, it is crucial to thoroughly read the label and go through any concerns with a healthcare professional.ingredient
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mass (g) to mass (g)
N2 + 3H2 > 2NH3
How many moles of hydrogen are needed to react with 2 grams of nitrogen?
Answer:
0.214 moles of hydrogen are needed to react with 2 grams of nitrogen.
Transcribed Image Text:What is the formal charge of an oxygen atom that forms three bonds and has one lone pair? -2 -1 +1 +2
It will have a formal charge of 1+ if it has three bonds in addition to one lone pair, like the hydronium ion does. When an oxygen atom contains one link, two lone pairs, and one unpaired (free radical) electron, it has a formal charge of zero and can also exist as a radical.
When an oxygen atom contains two bonds and two lone pairs, it is commonly said to have a formal charge of zero. Alternative configurations include oxygen with 3 lone pairs and 1 bond with a formal charge of 1+, and oxygen with 3 bonds and 1 lone pair and a formal charge of 1.With three bonds, what charge does oxygen have. Typically, oxygen has two bonds; nevertheless, on occasion.
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The Formal charge on the oxygen atom will be +2.
The formal charge of an atom is the difference between the number of valence electrons in the free atom and the number of electrons assigned to that atom in a Lewis structure.
In the structure, the oxygen atom is bonded to three hydrogen atoms and has one lone pair of electrons. To calculate the formal charge of the oxygen atom, we first need to determine the number of valence electrons in an oxygen atom, which is 6.
To assign electrons to the oxygen atom in the Lewis structure, we can follow the octet rule, which states that atoms tend to gain, lose, or share electrons in order to achieve a full outer shell of eight electrons (except for hydrogen, which only needs two). In the Lewis structure shown above, the oxygen atom has four valence electrons assigned to it: one from each of the three bonds and one from the lone pair. Therefore, the formal charge on the oxygen atom is:
Formal charge = valence electrons - assigned electrons
= 6 - 4
= +2
Therefore, the formal charge of the oxygen atom in this Lewis structure is +2.
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How many grams of water are produced by the combustion of 32.0g of ch4?
CH4+202–>2H2+CO2
Show your work
can you go from an aldehyde to a carboxylic acid
Producing Carboxylic Acids from Primary Alcohols or Aldehydes via Oxidation.The potassium dichromate(VI) solution undergoes a reaction and changes colour from orange to green.
An organic substance with a carboxyl functional group is known as a carboxylic acid. They are extensively distributed in nature and are also produced artificially by people. When carboxylic acids deprotonate, a carboxylate anion with the general formula R-COO- is produced. This anion can be used to create a number of beneficial salts, including soaps. Because it is made up of two functional groups—a carboxyl group and a hydroxyl group attached to a carbonyl group—the carboxyl functional group that distinguishes carboxylic acids is uncommon. It is frequently written as -CO2H or -COOH in condensed form. An organic acid that has a carboxyl group (C(=O)OH) connected to an R-group is referred to as a carboxylic acid in organic chemistry. A carboxylic acid's usual formula is RCOOH or RCO.
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some cars can use butane (c4h10) as feul 2c4h10+13o2->8co+10h2o
how many grams of h2o are produced 5.38 grams of o2
Answer:
Podemos utilizar la estequiometría de la reacción química para calcular la cantidad de agua (H2O) producida a partir de 5.38 gramos de oxígeno (O2).
La reacción química balanceada es:
2 C4H10 + 13 O2 → 8 CO + 10 H2O
La proporción molar entre O2 y H2O es 13:10. Primero, necesitamos determinar cuántos moles de O2 tenemos:
n(O2) = m(O2) / M(O2) = 5.38 g / 32 g/mol = 0.1681 mol
Según la estequiometría de la reacción, cada mol de O2 produce 10 moles de H2O. Ente
n(H2O) = 10 x n(O2) = 10 x 0,1681 mol = 1,681 mol
Finalmente, podemos calcular la masa de H2O producida:
m(H2O) = n(H2O) x M(H2O) = 1.681 mol x 18 g/mol = 30.258 g
Por lo tanto, se producen 30.258 gramos de H2O a partir de 5.38 gramos de O2.
Explanation:
espero te sirva
How much energy is released during the combustion of 60 g of ethane and excess o2? 2c2h6 7o2 → 4co2 6h2o, δh = -1500 kj/mol
The combustion of 60 g of ethane with excess oxygen releases approximately 1495.40 kJ of energy.
The combustion of 60 g of ethane (C2H6) with excess oxygen (O2) can be calculated using the balanced chemical equation:
2C2H6 + 7O2 → 4CO2 + 6H2O
From the balanced equation, we can see that for every 2 moles of ethane (C2H6) that react, 1500 kJ of heat energy is released. Therefore, we need to convert 60 g of ethane to moles using its molar mass of 30.07 g/mol:
60 g C2H6 × (1 mol C2H6 / 30.07 g C2H6) = 1.996 mol C2H6
Since 2 moles of ethane react to produce 1500 kJ of energy, we can use a proportion to calculate the energy released from 1.996 moles of ethane:
(1500 kJ / 2 mol C2H6) × 1.996 mol C2H6 = 1495.40 kJ
Therefore, the combustion of 60 g of ethane with excess oxygen releases approximately 1495.40 kJ of energy. This calculation assumes that all of the ethane reacts completely and that all of the heat energy released is transferred to the surroundings.
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The longest-range form of radiation, which has high energy and can range several hundred feet or more is:
A. beta particles
B. alpha particles
C. X-rays
D. neutron radiation
The longest - range form of radiation, which has high energy and can range several hundred feet or more is the correct option is D. neutron radiation.
The neutron radiation is the form of the ionizing radiation that is presents as the free neutrons. It is the phenomena that are the nuclear fission or the nuclear fusion which will causing the release of the free neutrons, which then will react with the nuclei of other atoms to form the new nuclides and which, in the turn, will trigger the further neutron radiation.
Thus, the neutron radiation is the longest range form of radiation, which has high energy .
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How are rocks most often classified?
A
by their age
B
by their mass
C
by their location
D
by their formation
Answer: the answer is d
Explanation:
Answer: I would say it how they form.
Explanation: for example sedimentary rocks form from rivière or other sources of water eroding rocks and depositing them in other places
a sample of gas occupies 1,55 L at 27 C what will be the volume at -100C?
what is oxygen gas formula?
The formula for oxygen gas is O₂.
Oxygen gas is a diatomic molecule consisting of two oxygen atoms bonded together by a covalent bond. It is a colorless, odorless, and tasteless gas that makes up about 21% of the Earth's atmosphere by volume. Oxygen gas is essential for the survival of most living organisms, as it is used in cellular respiration to produce energy.
It is also used in a variety of industrial processes, such as steel production and chemical synthesis. The chemical formula O2 is used to represent one molecule of oxygen gas, which contains a total of 16 protons and 16 electrons.
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a scientist mixes 0.02 g of a strong base in 83 ml of water and obtains a ph of 12. he then realizes that he forgot to label the container and forgot what base he added. what is the most likely the identity of this base?a. KOHb. LiOHc. RbOHd. NaOH
Now, we must first calculate the value of pOH using the provided pH value in order to get the concentration of hydroxide ions. LiOH will be the base.
What is meant by pH?A way to gauge how basic or acidic a material or solution is. On a scale of 0 to 14, pH is measured. A pH of 7 indicates neutrality on this scale, which implies it is neither acidic nor basic. If the pH is less than or equal to 7, it is more acidic and basic, respectively. pH is a measurement even though it appears to belong on the periodic table of elements.Potential Hydrogen, or pH, is an acronym that indicates the amount of hydrogen present in liquids as well as the degree of hydrogen ion activity.The negative logarithm of the hydronium ion concentration in moles per liter is used to calculate the pH of a solution. The formula is as follows:
pH = -log [H₃O⁺]
We have the relation, pH + pOH = 14
Then pOH = 14 - pH = 14 - 12 = 2
[OH⁻] = -log [pOH]
= -log (2)
= 10⁻² M
= 0.01 M
The base's molar mass is:
[OH⁻] = Mass of the base × 1000 / Molar mass × volume
0.01 = 0.02 × 1000 / 0.01 × 83
= 24 mol / gm
LiOH thus has a molar mass of 24 mol/gm.
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An instrument that is used in chemical experiments is:
A gun
A laser pointer
A vacuum chamber
Paper
For the list of alcohols rank the alcohols in strength from weakest acid t0 strongest acid: Weakest Strongest FzCHOH FzCOH FCH,OH CH;OH
Answer:
CH3OH (methyl alcohol)
FCH2OH (fluoromethanol)
F2CHOH (difluoromethanol)
F3COH (trifluoromethanol)
Explanation:
In general, the strength of an acid increases with the stability of the conjugate base. The more stable the conjugate base, the stronger the acid. In this case, we can compare the stability of the conjugate bases of the alcohols. The more stable the conjugate base, the weaker the acid.
The conjugate base of an alcohol is an alkoxide ion (RO-), formed by removing a proton (H+) from the alcohol. The stability of the alkoxide ion depends on the strength of the carbon-oxygen bond. The stronger the carbon-oxygen bond, the more stable the alkoxide ion, and the weaker the acid.
Therefore, we can rank the alcohols in terms of acidity as follows (from weakest to strongest):
c. CH3OH (methyl alcohol)
a. FCH2OH (fluoromethanol)
b. F2CHOH (difluoromethanol)
d. F3COH (trifluoromethanol)
This is because as we go from CH3OH to FCH2OH to F2CHOH to F3COH, the electronegativity of the atom attached to the carbon atom increases, leading to a stronger carbon-oxygen bond, and therefore a more stable alkoxide ion and a weaker acid.
A monatomic gas and a diatomic gas have equal numbers of moles and equal temperatures. Both are heated at constant pressure until their volume doubles. What is the ratio �
diatomic /
�
monatomic Q diatomic
/Q monatomic
?
The ideal monatomic molecule has three degrees of freedom, thus let N=the total number of molecules in each gas maintained at temperature T.
Hence, the monatomic gas's typical kinetic energy E₁=(3/2) Nkt
, then its heat capacity at constant volume,
[tex]e1=\frac{3}{2} nKt[/tex]
. [k= Boltzman constant]
Similarly, for the diatomic gas
Cv₂=5/2Nk
as 5 degrees of freedom are available to a diatomic molecule.
Now, each of the gases receives a certain quantity of energy E in the form of heat. If T₁ and T₂ are the corresponding temperature increases, then
E=Cv₁T₁=Cv₂T₂,
or,
T₁/T₂=Cv₂/Cv₁ = 5/3
So,
T1>T2
this monatomic gas will be more heated.
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The ratio of the final volumes is 1:1
The ratio of the final volume of the diatomic gas to that of the monatomic gas can be found using the ideal gas law, which relates pressure, volume, number of moles, and temperature:
PV = nRT
Where:
P = pressure
V = volume
n = number of moles
R = the gas constant
T = temperature
Since the gases are at the same temperature and have the same number of moles, their ratio of volumes will depend only on the ratio of their pressures.
Let's consider the monatomic gas first. Since the pressure is constant during heating, we can write:
P₁V₁ = nRT₁
After doubling the volume, the new volume is 2V₁, and we can write:
P₂(2V₁) = nRT₂
where P₂ is the new pressure and T₂ is the final temperature of the gas.
Dividing the second equation by the first equation, we get:
P₂(2V₁) / (P₁V₁) = nRT₂ / nRT₁
Canceling out n and rearranging the terms, we get:
P₂ / P₁ = (2V₁ / V₁) * (T₂ / T₁)
P₂ / P₁ = 2(T₂ / T₁)
Similarly, for the diatomic gas, we have:
P₃V₃ = nRT₁
P₄(2V₃) = nRT₂
Dividing the second equation by the first equation, we get:
P₄ / P₃ = (2V₃ / V₃) * (T₂ / T₁)
P₄ / P₃ = 2(T₂ / T₁)
Since both gases have the same number of moles and are heated at constant pressure, their initial pressures are the same (P₁ = P₃). Therefore, the ratio of the final pressures is:
P₂ / P₄ = (P₂ / P₁) * (P₃ / P₄) = 1 * (P₃ / P₄) = P₃ / P₄
Substituting the expressions we found for P₂ / P₁ and P₄ / P₃, we get:
P₃ / P₄ = (2(T₂ / T₁)) / (2(T₂ / T₁)) = 1
Therefore, the ratio of the final volumes of the diatomic gas to the monatomic gas is:
(2V₃) / (2V₁) = V₃ / V₁ = P₃ / P₁ = 1
So the ratio of the final volumes is 1:1. This means that both gases will occupy the same volume after being heated at constant pressure until their volume doubles, as long as they have the same number of moles and the same initial temperature.
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At which catabolic step is the greatest quantity of ATP produced? Oxidative phosphorylation Citric acid cycle Glycolysis Pyruvate oxidation Alcoholic fermentation
Oxidative phosphorylation is the catabolic step in which the greatest quantity of ATP produced.
What is oxidative phosphorylation?Oxidative phosphorylation or electron transport-linked phosphorylation or terminal oxidation is the metabolic pathway in which cells use enzymes to oxidize nutrients, thereby releasing chemical energy in order to produce adenosine triphosphate (ATP).
In eukaryotes, this takes place inside mitochondria. Almost all aerobic organisms carry out oxidative phosphorylation. This pathway is so pervasive because it releases more energy than alternative fermentation processes such as anaerobic glycolysis.
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Samantha recorded observations on the similarities between the life cycle of an eagle and the life cycle of a moth that undergoes complete metamorphosis. Which observation is Samantha wrong about?
A moth and an eagle both start their life cycle as a fertilized egg.
A moth and an eagle both hatch from an egg outside of their mother.
A moth and an eagle both undergo complete metamorphosis with significant change during development.
A. I
B.I and II
II and III
III
Answer:
C. II and III
Explanation:
Observation I is correct, as both moths and eagles begin their life cycle as a fertilized egg. Observation III is also correct, as both undergo significant changes during development.
However, Observation II is incorrect. Eagles are born as live young, while moths hatch from their eggs as larvae and undergo complete metamorphosis before becoming an adult. Therefore, moths do not hatch from an egg outside of their mother, but rather hatch from an egg laid by their mother.
In the following acid-base reaction, CH3NH3+ is the CH3NH2(g) + H2O(1) → CH3NH3(aq) + OH¯(aq)
Conjugate base
Conjugate acid
Acid
In the given acid-base reaction, CH[tex]_3[/tex]NH[tex]_2[/tex](g) + H[tex]_2[/tex]O(1) → CH[tex]_3[/tex]NH[tex]_3[/tex]⁺(aq) + OH¯(aq), CH[tex]_3[/tex]NH[tex]_3[/tex]⁺ is the Conjugate acid.
What is acid-base reaction?The exchange with one or maybe more hydrogen ions, H+, among species that could be neutral (molecules like water, H2O, or acetic acid, CH3CO2H), as well as electrically charged (ions like ammonium, NH4+, hydroxide, OH, or carbonate, CO32), is what is known as an acid-base reaction.
It also covers equivalent behavior of acidic ions and molecules (aluminum chloride, AlCl3, and the silver ion AG+) that do not give hydrogen ions. In the given acid-base reaction, CH[tex]_3[/tex]NH[tex]_2[/tex](g) + H[tex]_2[/tex]O(1) → CH[tex]_3[/tex]NH[tex]_3[/tex]⁺(aq) + OH¯(aq), CH[tex]_3[/tex]NH[tex]_3[/tex]⁺ is the Conjugate acid.
Therefore, in the given acid-base reaction, CH[tex]_3[/tex]NH[tex]_2[/tex](g) + H[tex]_2[/tex]O(1) → CH[tex]_3[/tex]NH[tex]_3[/tex]⁺(aq) + OH¯(aq), CH[tex]_3[/tex]NH[tex]_3[/tex]⁺ is the Conjugate acid.
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What is the density of a substance that has a volume of 24 ml and weighs of 216 grams
Explanation:
Formula for density = mass/volume
where mass = 216g
volume = 24ml
density = ?
Density = 216 ÷ 24
= 9g/ml
why 1-bromobutane undergoes dehydrohalogenation by an E2 elimination mechanism when heated with potassium tert-butoxide.?
1-bromobutane undergoes dehydrohalogenation by an E2 elimination mechanism when heated with potassium tert-butoxide because this follow second order kinetics.
E2 elimination mechanism can be referred as a bimolecular elimination which is basically a one-step mechanism. In this mechanism, the carbon-hydrogen and carbon-halogen bonds mostly break off to form a new double bond. In the E2 elimination mechanism a base is part of the rate-determining step and it has a huge influence on the mechanism. A second-order reaction is defined as the sum of the exponents in the rate law is equal to two. Dehydrohalogenation is defined as a reaction in which a hydrogen atom and a halogen atom are removed from adjacent atoms in a molecule forming an alkene or an alkyne. When reacted with strong base such as hydroxide ion, cyclohexyl chloride and potassium tert-butoxide suffers dehydrohalogenation by a concerted E2 reaction mechanism.
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From the following which reaction is not redox reaction ?A. 2H2+????2→2H2????B. ????????++????????→????????+++????????C. H????????+H2????→H3????++????????−D. ????????2+2H2????+????????2→4H++????????−24+2????????−
The correct answer is C. H???????? + H2???? → H3????+ + ????????-, since there is no change in oxidation state for any of the elements in the reaction, which is the key characteristic of redox reactions.
In this reaction, the hydrogen molecule (H2) is split into two hydrogen ions (H+) and two electrons (e-). One of the hydrogen ions combines with another hydrogen atom (H?) to form a hydronium ion (H3O+), while the remaining electron and the other hydrogen ion (H+) combine to form a hydrogen molecule (H2). Probable reactions would be HCl+H2O → H3O+Cl-
There is no change in oxidation state for any of the elements in the reaction, since hydrogen goes from an oxidation state of 0 in both the reactants and the products.
A. 2H2+????2→2H2???? probable reactions would be 2H2+O2→2H2O is a redox reaction, as oxygen is being reduced from O2 to OH- and hydrogen is being oxidized from H2 to H+.
B. ????????++????????→????????+++???????? probable reactions would be K+Fe3+→K+Fe2+ is a redox reaction, as iron is being reduced from Fe3+ to Fe2+ and potassium is being oxidized from K+ to K+.
D. ????????2+2H2????+????????2→4H++????????−24+2????????− probable reactions would be C2H2+2H2O+O2→4H++CO2−24+2O2− is a redox reaction, as oxygen is being reduced from O2 to OH- and carbon is being oxidized from C2H2 to CO2.
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How does the seed of a gymnosperm differ from the seed of an angiosperm?
Answer:
The seed of a gymnosperm is typically covered by a protective coat, such as a cone or a scale, while the seed of an angiosperm is typically enclosed in a fruit or other protective covering. Additionally, gymnosperm seeds are typically not as well-developed as angiosperm seeds, and they do not contain an embryo or endosperm.