Stoichiometry Review

Balancing Equations

100

___ HCl + ___ NaOH --> ___ NaCl + ___ H₂O

What is 

1 HCl + 1 NaOH --> 1 NaCl + 1 H₂O

200

___ K + ___ B₂O₃ --> ___ K₂O + ___ B

What is

6 K + 1 B₂O₃ --> 3 K₂O + 2 B

300

___ H₃PO₄ + ___ KOH -> ___ K₃PO₄ + ___ H₂O

What is 

1 H₃PO₄ + 3 KOH -> 1 K₃PO₄ + 3 H₂O

400

___ N₂ + ___ O₂ --> ___ N₂O₅

2 N₂ + 5 O₂ --> 2 N₂O₅

500

___ Na + ___ NaNO₃ --> ___ Na₂O + ___ N₂

What is 

10 Na + 2 NaNO₃ --> 6 Na₂O + 1 N₂

Mole to Mole

100

N₂ + 3H₂  --> 2NH₃

Given 2.0 moles of Nitrogen, N₂, how many moles of Hydrogen, H₂, are needed? 

What is 

6.0 moles H₂

200

2KClO₃ → 2KCl + 3O₂

Given 6.0 moles of potassium chlorate, KClO₃, how many moles of oxygen, O₂, are produced?

What is 

9.0 moles of O₂ 

300

Zn + 2HCl → ZnCl₂ + H₂

Given 3.0 moles of zinc, how many moles of hydrogen, H₂, are produced? 

What is 

3.0 moles of H₂

400

C3H8 + 3O2 → 3CO2 + 4H2

Given 4.7 moles of propane, C₃H₈, how many moles of oxygen are needed to react? 

What is 

14.1 moles of O₂

500

K3PO4 + Al(NO3)3 → 3KNO3 + AlPO4

Given 4.8 moles of potassium phosphate, K₃PO₄, how many moles of potassium nitrate, KNO₃, are produced? 

What is 

14.4 moles KNO₃

Mole to grams/Grams to moles

100

N₂ + 2O₂ → N₂O₄

Given 15.0g of N₂O₄, how many moles of O₂ were required?

What is 

0.326 mol O₂

200

CaC₂ + 2H₂O → Ca(OH)₂ + C₂H₂

If you have 5.50 mol of CaC₂, how many grams of C₂H₂ do you get?

What is

143g C₂H₂

300

CaC₂ + 2H₂O → Ca(OH)₂ + C₂H₂

How many moles of water are needed when 65.0g of CaC₂ have reacted?

What is 

2.03 mol H₂O

400

2NaClO₃→ 2NaCl + 3O₂

How many grams of NaCl are produced when 20.00mol of NaClO₃ reacts?

What is

1170g NaCl

500

2NaClO₃→ 2NaCl + 3O₂

How many moles of O₂ are produced when 40g of NaCl are formed?

What is 

1 mol O₂ 

Grams to Grams

100

2 KClO₃ --> 2 KCl + 3 O₂

How many grams of O₂ will be formed from 3.76 grams of KClO₃?

What is 

1.47g O₂

200

2 KClO₃ --> 2 KCl + 3 O₂

How many grams of KClO₃ are needed to make 30.0 grams of KCl?

What is

49.3g KCl

300

4 Fe + 3 O₂ --> 2 Fe₂O₃

Given 42.7 grams of Fe, how many grams of Fe₂O₃ are produced?

What is

61.0 Fe₂O₃

400

4 Fe + 3 O₂ --> 2 Fe₂O₃

Given  17.0 grams of O2, how many grams of Fe₂O₃ are produced?

What is 

56.6g Fe₂O₃

500

2 C₄H₁₀ + 13 O₂ --> 8 CO₂ + 10 H₂O

How many grams of H₂O are produced when 5.38g of O₂ is reacted?

What is 

2.33g H₂O

Molar mass

100

Find the molar mass and round to the nearest 0.1 grams

NaBr

What is 

102.9 g/mol 

200

Find the molar mass and round to the nearest 0.1 grams

PbSO₄

What is 

303.3 g/mol

300

Find the molar mass and round to the nearest 0.1 grams

Na₃PO₄

What is 

164.0 g/mol

400

Find the molar mass and round to the nearest 0.1 grams

(NH4)2CO3

What is 

96.0 g/mol

500

Find the molar mass and round to the nearest 0.1 grams

Zn(C₂H₃O₂)₂

What is 

183.4 g/mol