Mole to Mole Conversions

Name: ______Date: ______Period: ______

What is Stoichiometry:  Branch of chemistry that deals with the quantitative relationships that exist between the reactants and products in a chemical reaction

o “Stochio” = Greek for element

o “metry” = measurement

 Moles allow us to convert between particles, mass, and volume

o 1 mole = 6.02 x 1023 particles

o 1 mole = Molar Mass (g/mol)

o 1 mole = 22.4 L

Crumbs Inc.:  What if you needed 32 cookies, how much butter would you need?

 What if you had 3 cups of flour and wanted to use it all, how many eggs would you then need?

Mole Ratios:  Convert from chemical G to chemical W using molar ratios

o We get the number of moles from the coefficients in the balanced equation

o Coefficient = # moles in the reaction

Practice Problems:

1. How many moles of ammonia can be produced from 11 moles of nitrogen gas?

= ______2. If you want to react 5.2 moles of hydrogen gas, how many moles of nitrogen gas would be needed?

= ______

**Remember all problems must first be balanced!! 

**Also remember to show all your work and to write the number, units, and chemical in work and answer!! 

Practice:

1. How many moles of hydrogen, H2, are needed to react with 2.0 moles of nitrogen, N2? N2 + 3H2 → 2NH3

= ______

2. How many moles of oxygen are produced by the decomposition of 6.0 moles of

potassium chlorate, KClO3?

2KClO3 → 2KCl + 3O2

= ______

3. How many moles of hydrogen are produced from the reaction of 3.0 moles of zinc?

Zn + 2HCl → ZnCl2 + H2

= ______4. How many moles of potassium nitrate are produced when 2.5 moles of potassium phosphate react?

K3PO4 + Al(NO3)3 → KNO3 + AlPO4

= ______