V(H2) = 3.05 L
m(O2) = 1.48 g
2H2 + O2 => 2H2O
n(H2) = V/Vm = 3.05 L/22.4 L/mol = 0.136 mol
n(O2) = 1.48 g/ 32 mol/L = 0.046 mol => limited reagent
n(H2O) = n(O2) = 0.046 mol
m(H2O) = n(H2O)*M(H2O) = 0.046 mol*18 g/mol = 0.828 g
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