Chemistry Questions?

Posted on 2015-10-22 07:35:00 in Chemistry by JACK MCLEO

Hydrogen gas burns according to the equation:
2H2 + O2 -> 2H2O

3.00 g of H2 is mixed with 32.0 g of O2

1. Calculate the masses of all three materials after the reaction is complete

2. Calculate the total mass after the reaction is complete. Compare it to the total mass before the reaction begins. Is mass conserved during the reaction?

3. Calculate n(initial total) and n (final total). Is the number of moles conserved during the reaction?

4. if 25.0 g of H2O is actually recovered, what is the per cent yield?

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