Stoichiometry

Question 1

What does stoichiometry calculate?

Answer 1

How much of each chemical we need to produce a reaction while respecting the law of conservation of matter

Question 2

2H2 + O2 —> 2H2O

If I have 7 moles of oxygen, how many moles of hydrogen will be needed to use up all the oxygen and make water?

Answer 2

14 mol

Question 3

2H2 + O2 —> 2H2O

If I have 205.3 moles of water, how many moles of oxygen will I need?

Answer 3

102.65 mol

Question 4

2H2 + O2 —> 2H2O

If I have 0.40 mole of hydrogen, how many moles of water can I make?

Answer 4

0.40 mol

Question 5

How many mol in 100g of CO2?

Answer 5

2.27 mol

Question 6

If we have 0.52g of hydrogen, how many grams of hydrogen will we need to make water?

Answer 6

4.12g

Question 7

2H2 + O2 —> 2H2O

If we have 1g of hydrogen, how many mol of water can we make?

Answer 7

0.50 mol

Question 8

2H2 + O2 —> 2H2O

If you have 1g of hydrogen, how much oxygen will you need to make as much water as possible?

Answer 8

0.25 mol

Question 9

Fe2O3 + 2Al —> Al2O3 + 2Fe

If we have 85g of Iron(lll)oxide, how many g aluminum will we need to get this party started? How many mol?

Answer 9

• 28.72g

- 1.06g

Question 10

C3H8+ 5O2 —> 3CO2 + 4H2O

How many moles of CO2 will be produced from 25g of C3H8?

Answer 10

1.70 mol

Question 11

Check up (text book)

Answer 11

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