Chemistry help? please? urgent!

Posted on 2016-05-05 18:41:00 in Chemistry by KEELAN

1.) How many atoms of iron are in 2 formula units of Fe2O3? 
2.) How many atoms of iron are in 2 moles of iron? 
3.) How many grams of iron are in 0.35 moles of iron? 
4.) How many atoms of iron make up 88 grams of iron? 
5.) How many grams of iron will be in 8.3 x 10^25 atoms of iron? 
6.) If you have 12 L of CO gas at STP, how many moles of gas will you have?

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