stoichiometry

Question 1

What is stoichiometry?

Answer 1

Stoichiometry is the calculation of quantities in chemical reactions.

Question 2

What is a stoichiometric coefficient?

Answer 2

A stoichiometric coefficient is the number that appears before a compound in a balanced chemical equation.

Question 3

True or False: Stoichiometry deals with the relationships between the amounts of substances in a chemical reaction.

Answer 3

True

Question 4

What is a limiting reactant?

Answer 4

The limiting reactant is the reactant that is completely consumed in a chemical reaction.

Question 5

What is a theoretical yield?

Answer 5

The theoretical yield is the maximum amount of product that can be produced in a chemical reaction.

Question 6

What is actual yield?

Answer 6

Actual yield is the amount of product actually obtained from a chemical reaction.

Question 7

What is percent yield?

Answer 7

Percent yield is the ratio of actual yield to theoretical yield, expressed as a percentage.

Question 8

What is a molar ratio?

Answer 8

A molar ratio is the ratio of moles of one substance to moles of another substance in a chemical reaction.

Question 9

What is Avogadro’s number?

Answer 9

Avogadro’s number is 6.022 x 10^23, representing the number of atoms or molecules in one mole of a substance.

Question 10

What is the formula for percent yield?

Answer 10

Percent yield = (actual yield / theoretical yield) x 100

Question 11

What is the formula for molarity?

Answer 11

Molarity = moles of solute / liters of solution

Question 12

What is a stoichiometry problem-solving strategy?

Answer 12

1. Write a balanced chemical equation. 2. Convert the given quantity to moles. 3. Use the mole ratio to calculate moles of the desired substance. 4. Convert moles to the desired units.

Question 13

What is the law of conservation of mass?

Answer 13

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Question 14

What is a stoichiometry calculation?

Answer 14

A stoichiometry calculation involves determining the amounts of reactants and products in a chemical reaction.

Question 15

What is a stoichiometry table?

Answer 15

A stoichiometry table is a visual aid used to organize information about reactants and products in a chemical reaction.

Question 16

What is the formula for moles?

Answer 16

Moles = mass / molar mass

Question 17

What is the relationship between moles and grams?

Answer 17

The relationship between moles and grams is determined by the molar mass of the substance.

Question 18

What is the formula for molar mass?

Answer 18

Molar mass = sum of the atomic masses of all atoms in a molecule

Question 19

What is a stoichiometry conversion factor?

Answer 19

A stoichiometry conversion factor is a ratio derived from the coefficients in a balanced chemical equation, used to convert between different units.

Question 20

What is the law of definite proportions?

Answer 20

The law of definite proportions states that a chemical compound always contains the same elements in the same proportions by mass.

Question 21

What is the formula for moles to liters of gas at STP?

Answer 21

Moles to liters of gas at STP = moles x 22.4 L/mol

Question 22

What is the formula for mass percent composition?

Answer 22

Mass percent composition = (mass of element / total mass of compound) x 100

Question 23

What is stoichiometry used for?

Answer 23

Stoichiometry is used to predict the amounts of reactants and products in a chemical reaction.

Question 24

What is the formula for grams to moles conversion?

Answer 24

Grams to moles = grams / molar mass