22 Adv Unit 9 Review Stoich

_______ stoichiometry deals with the mass relationships of elements in compounds.

• composition

• reaction

• mole

• elemental

Balance the following reaction. What is the mole ratio of LiOH to H₂O?

CO₂ + LiOH --> Li₂CO₃ + H₂O

• 2:1

• 1:1

• 2:2

• 1:2

What is the iron to sulfate ratio in iron (III) sulfate?

• 3:2

• 2:3

• 3:1

• 1:1

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

• theoretical yield

• mole ratio

• actual yield

• percent yield

2 KClO₃ --> 2 KCl + 3 O₂

How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

• 6.7 mol

• 10 mol

• 10. mol

• 4.5 mol

Tags

NGSS.HS-PS1-7

What is the measured amount of a product obtained from a chemical reaction?

• mole ratio

• theoretical yield

• percent yield

• actual yield

Cl₂ + 2 KBr → Br₂ + 2 KCl
How many grams of potassium chloride can be produced from 356 g of chlorine and 356 g of potassium bromide?

• 749 g
• 223 g
• 479 g
• 814 g

A chemist interested in the efficiency of a chemical reaction would calculate the

• mole ratio

• theoretical yield

• percent yield

• actual yield

What is an excess reactant?

• amount you end with

• what you run out of first

• what you have left over

• what you start with

When does a chemical reaction stop?

• When the lab is finished
• When the excess reactant is used up
• When the limiting reactant is used up
• Chemical reactions never stop