Consider:

Question

C6H12)6 + 6O2-> 6CO2 + 6H2O + Energy

a)If I have 90 grams glucose and all is consumed by oxygen, then how many grams of water will be produced?

b)How many grams of oxygen will be consumed?

c)How many grams of sugar will be burned off if 85 grams of O2 is consumed?

Answer 1

Here is a worked example problem. Just follow the steps.
http://www.jiskha.com/science/chemistry/stoichiometry.html

Answer 2

That helps me with part a but are the other 2 parts done the same way?

Answer 3

Yes. All are simple (that means not limiting reagent) stoichiometry problems.All of them are done the same way.