Mole-to-mole stoichiometry

What is stoichiometry?

• study of numbers of hydrocarbons in a reaction

• study of numbers/ratios between reactants and products in a chemical reaction

• study of amount of reactions something can do

• a magical spell from Harry Potter

If a chicken sandwich has 2 slices of bread and 3 pieces of chicken per sandwich.

How many pieces of chicken are in 7 sandwiches??

• 3

• 21

• 7

• 12

Balance the below equation:

N₂ + ?H₂ ---> ?NH₃

• N₂ + 6H₂ --> 2NH₃

• 2N₂ + 2H₂ --> 2NH₃

• N₂ + 3H₂ --> 2NH₃

N₂ + 3H₂ → 2NH₃

What is the mole ratio between N₂ and NH₃ in the above reaction?

• 1 moles NH₃ / 2 moles N₂

• 2 moles NH₃ / 1 moles N₂

• 2 moles N₂ / 3 moles NH₃

• 1 moles N₂ / 3 moles NH₃

N₂ + 3H₂ → 2NH₃

How many moles of H₂ is needed to react with 2 moles of N₂?

• 6

• 3

• 2

• 1

Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from  6 moles H₂? 

• 4 moles Fe
• 6 moles Fe
• 9 moles Fe
• 2 moles Fe

What coefficient should be used to make the following equation balanced?
N₂+O₂--> _NO 

• 1
• 2
• 3
• 4

2H₂ + O₂ → 2H₂O

How many moles of H₂O is produced when 8 moles of H₂ reacts fully?

• 1

• 2

• 8

• 16

4 Fe + 3 O₂ → 2 Fe₂O₃

How many moles of Fe is needed to react with 9.75 moles of O₂?

• 3

• 4

• 13

• 39

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

How many moles of CO₂ is produced when 17.5 moles of O₂ reacts fully?

• 4

• 7

• 10

• 30.63