CHEMISTRY
posted by Emma .
The following reaction represents the decomposition of hydrogen peroxide:
Balanced equation: 2H2O2 > O2 + 2H2O
How many moles of oxygen are produced from the decomposition of 3.4g of hydrogen peroxide?
How many molecules of O2 are produced?
For the second question, is the answer 1 molecule?

2H2O2 ==> 2H2O + O2
3.4g is how many moles of H2O2? That is moles = grams/molar mass.
The equation tells you that 1 mole O2 is produced by 2 moles H2O2.
For the last part, no, 1 is not the answer. Remember there are 6.022E23 molecules in 1 mole. 
Thank you!
For the second question could you tell me how to find the answer? 
# molecules = mols O2 x 6.022E23 = ?