Answer: 0.09997 H2O2
Step-by-step explanation:
To do this we only need one conversion factor: the molar mass of H2O2. We find this using our periodic table by adding the molar masses of 2 hydrogens and 2 oxygens:
(2)(16.00g/mol) + (2)(1.008g/mol)= 34.01g/mol
With this number, you can now cancel out grams to get your final answer in moles:
3.4g H202 x 1mol H2O2/34.01g
Grams on the top and bottom cancel out, and you get your final answer of 0.09997 mol H2O2.