Question 1

In order to perform a stoichiometry calculation you must always  have

Accepted Answer

a balanced equation

Answer

a periodic table

Answer

the molar mass for every compound and element

Answer

an electronic balance

Question 2

To find the molar mass of an element or compound you need

Accepted Answer

a periodic table

Answer

the molar ratio

Answer

a balance

Answer

a balanced equation

Question 3

What is stoichiometry?

Accepted Answer

The quantitative relationships between amounts of reactants used and products formed by a chemical reaction

Answer

The relationship between the periodic table and the molar mass

Answer

The relationship between you and your best friend

Answer

The relationship between moles of each substance in a reaction

Question 4

The coefficients in a chemical equation tell you

Accepted Answer

the molar ratio

Answer

the percent composition

Answer

the amount of product

Answer

the molar mass

Question 5

Stoichiometry is based on the

Accepted Answer

Law of Conservation of Matter

Answer

Avagadro's number

Answer

molar mass

Answer

conversons

Question 6

What is a limiting reactant?

Accepted Answer

the reactant that "runs out' first

Answer

is the reactant the is "left over"

Answer

is always oxygen

Answer

does not react

Question 7

What is an excess reactant?

Accepted Answer

The reactant that is "left over".

Answer

the reactant that "runs out" first

Answer

the reactant that reacts last

Answer

the reactant that dos not react

Question 8

The limiting reactant determines

Accepted Answer

all of these

Answer

how much excess reactant is used

Answer

how much product is made

Answer

how much excess reactant remains

Question 9

You want to make hamburgers for a cookout.  You have 12 burger patties and 10 hamburger buns.  How many complete hamburgers can you make and what is you limiting ingredient.

Accepted Answer

10 hamburgers&#44; hamburger buns

Answer

10 hamburgers&#44; burger patties

Answer

12 hamburgers&#44; burger patties

Answer

12 hamburgers&#44; hamburger buns

Question 10

When calculating percent yield, the theoretical yield is

Accepted Answer

What you were supposed to get according the math/stoichiometry

Answer

what you got in the lab

Answer

the percentage

Answer

the total of all the reactants

Question 11

When calculating percent yield the actual amount would be

Accepted Answer

the measurement you got in lab

Answer

the amount you got using stoichiometry

Answer

the molar mass

Answer

the percentage

Question 12

What is the equation of percent yield?

Accepted Answer

actual yield/ theoretical yield X 100

Answer

part/whole X 100

Answer

theoretical yield/actual yield X 100

Answer

whole/part X 100

Question 13

When setting up a stoichiometry problem, how do know what number to put in front of "g" on the right hand side of the equation?

Accepted Answer

Use the molar mass of the element/compound X the coefficient from the balanced equation

Question 14

When setting up a stoichiometry problem, how do know what number to put in front of "mol" on the right hand side of the equation?

Accepted Answer

use the coefficient from the balanced equation

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