Unit 5 Review

Molar Mass

100

What is the correct units for molar mass?

grams/mol

200

What is the molar mass for Cu₂?

127 grams/mol Cu₂

300

Where can molar mass of an element be found on the periodic table? 

Value underneath the symbol of each element

400

What kind of problem is molar mass used in? 

Conversions

500

What is the molar mass of Mn₂Se₇?

131.7g/mol

Conversions

100

How can you convert from mass x to mole x?

molar mass of x

200

How many moles are in 36 g of Cl? 

1.02 mol

300

2 H₂ + O₂ = 2H₂O

How many moles of H₂O are produced from 66 grams of O₂?

4.13 moles H₂O produced

400

How do I convert moles of a reactant to moles of a product? 

Molar ratio from the balanced chemical equation

500

CH₄ + 2O₂ ---> CO₂ + 2H₂O

How many grams of carbon dioxide are produced if given 8.3g of methane? 

22.7 grams carbon dioxide

Moles

100

How many molecules are in a mole? 

6.02 x 10²³ OR: Avogadro's number

200

1 mole of CO₂ has the _______ number of molecules as 1 mole of CH₄

same

300

True or false: using the molar mass of a substance allows you to convert between grams and moles of the same substance? 

True

400

What are the 2 main definitions (equalities) of a mole? 

1. 1 mole= 6.02 x 10²³ particles

2. 1 mole = molar mass (can be atomic mass from periodic table or molecular mass)

500

In the balanced equation of the synthesis of water, how many moles of hydrogen are needed to produce 2 moles of water? 

2