Final answer:
Approximately 48.823 grams of H2O are produced from 5.47 grams of H2 in the given chemical reaction.
Step-by-step explanation:
To determine how many grams of H2O are produced in a given chemical reaction, we need to use the balanced chemical equation and the molar masses of the compounds involved. From the balanced equation 2H2 + O2 -> 2H2O, we can see that for every 2 moles of H2, we get 2 moles of H2O. So if we have 5.47 grams of H2, we can convert it to moles using the molar mass of H2, which is 2.02 g/mol.