Question

H2 combines with o2 to form h2o in which 16g of oxygen

Answer 1

Answer:

H2 = 2 g/mol; 16 g = 8 mol of H2

O2 = 32 g/mol; 16 g = 0.5 mol of O2

The balanced equation for this reaction is:

2 H2 + O2 = 2 H2O

So, if 2 moles of H2 react with 1 mol of O2, we can see that O2 is the limiting reactant, that is, after the reaction is completed, 1 mol of H2 will have reacted with 0.5 mol of O2 and there will be 7 mol of H2 left in the system.

Therefore, 1 mol of water will be produced, and since H2O has 18 g/mol, then 18 g of H2O will be produced.