Chapter 12

Question 1

What do a balanced equation and a recipe have in common?

Answer 1

The same type of quantitive data.

Question 2

What do chemists use balanced equations for?

Answer 2

As a basis to calculate how much reactant is needed or product formed in a reaction.

Question 3

What do you need to get the rest of an equation?

Answer 3

The quantity.

Question 4

Stoichiometry

Answer 4

Bookkeeping

Question 5

How can a balanced chemical equation be interpreted?

Answer 5

In different quantities including numbers of atoms, molecules, or moles; mass; and volume.

Question 6

STP

Answer 6

22.4

Question 7

Are mass and atoms conserved in every chemical reaction?

Answer 7

yes

Question 8

Avogadro’s number

Answer 8

6.022x10^23

Question 9

Mole Ratio

Answer 9

Conversion factor derived from the coefficients of a balanced equation interpreted in terms of mass.

Question 10

Limiting Reagent

Answer 10

Determines the amount of product that can be formed, is used up.

Question 11

Excess Reagent

Answer 11

Reaction not completely used up.

Question 12

Theoretical Yield

Answer 12

The max amount of product that could be formed from given amounts of reactants.

Question 13

Actual Yield

Answer 13

Amounts actually gotten in the reaction.

Question 14

Percent Yield

Answer 14

actual yield
————————- x100
theoretical yield