1. 0.4764 g of a sample of oxide of iron was reduced by a stream
of CO. 0.3450 g of iron metal remained after reduction. What is the
empirical formula of the oxide?
I'm not sure of the approach to this question but I merely
subtracted the 2 values and "assumed" oxygen is at 0.1314 g.
However after calculations, I got FeO as the answer when the actual
answer is Fe3O4. Can someone explain how I can solve this?
2. Complete combustion of a hydrocarbon, Y, yields 2.64 g of CO2
and 2.16g of H2O. What is the empirical formula of the hydrocarbon?
(No clue for this question as well)
3. Why is it that in 1 g of H2 gas, there is 1 mole of
electrons?
After all,
No, of moles = 1 / (1+1)
=0.5
mol (assuming hydrogen exists as H2 molecules)
Thank you.