Molar mass

Using the periodic table, determinate the molar masses of:

1. Hydrogen, H
2. Oxygen, O
3. Dioxygen, O₂
4. Potassium permanganate, KMnO₄
5. Nitrogen triiodide, NI₃
6. Starch, C₆H₁₀O₅
7. Nitroglycerin, C₃H₅N₃O₉
8. Ethanol, C₂H₆O
9. Pentane, C₅H₁₂
10. Magnesium sulfate, MgSO₄

I'll put a mark out of 20.