Vinegar, a common household item, is used in cleaning, cooking, baking and meat preservation. Vinegar contains acetic acid, HC2H3O2 which gives vinegar its' sour taste and pungent smell. What is the percent composition of carbon in acetic acid? I will give brainliest.

The molecules having C=O bond are called carbonyl compounds. Among the given statements, a tertiary amine reacts with a ketone to form an enamine is not true. The correct option is D.

The organic compounds which contain nitrogen atoms with a lone pair are called the amines. In general they are derived from ammonia in which one or more 'H' atoms is replaced by an alkyl or aryl group.

The tertiary amines do not react with aldehydes and ketones to produce stable products. They have no 'NH' hydrogens and therefore cannot even form carbinolamines. But with primary amines ketones form imines and enamines with secondary amines.

Thus the correct option is D.

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Your question is incomplete, but most probably your full question was:

which of the following statements is not true?

A. a ketone reacts with a peroxyacid to form an ester

B. a primary amine reacts with a ketone to form an imine

C. an aldehyde reacts with sodium borohydride followed by addition of acid to form a primary alcohol

D. a tertiary amine reacts with a ketone to form an enamine

E. a ketone reacts with a phosphonium ylide to form an alkene

MgO particles have a mass of 7.4 x 1023 grams.

According to Wikipedia, "a gram molecule can be defined as the amount of a substance equal to its relative molecular mass in grams." One gram of water, for instance, weighs 18 grams (H 2 O = 1 + 1 + 16 = 18 g).

The most common unit used in chemistry to express molarity is the number of moles per liter, represented by the unit sign mol/L or mol/dm3 in SI units. One molar, or 1 M, of a solution's concentration is defined as one mol/L.

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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.

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Your question is incomplete, but most probably your full question was.

How many g KClO₃ are produced if 3.3 mol O₂ is reacted?

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.

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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 .

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.

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.

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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.

The average mass from the given data set is approximately 5.4677.

An indicator of the central tendency of a collection of data reflecting item masses is average mass. It is also referred to as the arithmetic mean and is determined by adding the masses of all the objects in a dataset and dividing the result by the total number of objects in the dataset. In order to give a general idea of the normal mass of the objects in the collection, the average mass is employed. It is extensively employed in a variety of industries, including engineering and scientific research. In statistics, the idea of average mass is crucial since it allows for the conclusion- and decision-making-based analysis of big datasets. It offers a summary metric that is helpful for contrasting various data sets.

To calculate the average mass from the data set, we need to add up all the masses and then divide by the number of masses.

Adding up the masses:

5.455 + 5.495 + 5.453 = 16.403

Dividing by the number of masses (which is 3 in this case) gives us the average mass:

16.403 / 3 = 5.46766666667 (rounded to 11 decimal places)

Therefore, the average mass from the given data set is approximately 5.4677.

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The correct valence for ions of the following elements are:

Ca: 2+

Cl: 1-

O: 2-

Al: 3+

K: 1+

What is valence?

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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.

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Answer:

✿´`·.·´`✿What are the 7 steps in a scientific method and its definition?

Image result for Match each scientific method term to its definition.

The six steps of the scientific method include: 1) asking a question about something you observe, 2) doing background research to learn what is already known about the topic, 3) constructing a hypothesis, 4) experimenting to test the hypothesis, 5) analyzing the data from the experiment and drawing conclusions, and 6)

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.

Answer: True

Explanation: I would explain but it would take 100,000 years

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.

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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.)

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.

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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).

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.

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.

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To need 200 milliliters volume of water to dissolve 72 grams of salt at 25°C.

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.

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.

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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.

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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.

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.

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.

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The strong electrolytes are;

NaCl,HCl and NaOH

The weak electrolytes are ammonia

The non electrolyte is sucrose

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).

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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

The first pair of compounds are diastereomers. The second pair of compounds are enantiomers.

Enantiomers are pairs of molecules that are non-superimposable mirror images of each other. They are stereoisomers, which means that they have the same molecular formula and sequence of bonded atoms, but differ in the three-dimensional orientation of their atoms in space. Enantiomers have identical physical and chemical properties, except for the direction in which they rotate plane-polarized light and their interactions with other chiral molecules, such as enzymes and receptors.

Here,

In the first pair of compounds, the two adjacent chiral carbons have the same R configuration. However, the configuration of the second chiral carbon is different in the two compounds. In compound 1, the wedged bond is attached to hydrogen and the dashed bond is attached to hydroxy, while in compound 2, the opposite configuration is present. Therefore, these two compounds are diastereomers.

In the second pair of compounds, both compounds have the same hydroxy groups on carbons 1 and 4, but the configuration of the hydroxy groups on carbons 2 and 3 is different. In compound 1, the hydroxy group on carbon 2 has a wedged bond, and the hydroxy group on carbon 3 has a dashed bond, while in compound 2, the opposite configuration is present. Since these two compounds have opposite configurations at all chiral centers, they are enantiomers.

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The percent yield is  85%

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%

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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

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.

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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.

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.

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If we triple the number of moles in the gas vessel at constant pressure, the new volume will be three times the initial volume.

According 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.

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Answer:

C. 2:6

Explanation:

This is balanced reaction:

3Mg(NO3)2 + 2K3PO4 => Mg3(PO4)2 + 6KNO3

So 2 K3P04 to 6 KNO3

100 dm3 of Kr is equal to 100,000,000 cm3 of Kr. Since 1 mole of any gas occupies 22.4dm3 at STP.

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

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