How many grams of water, H₂O, can be produced by the reaction of 8 grams of oxygen, O₂, and 8 grams of hydrogen, H₂? A)16 grams B)10 grams C)9 grams D)8 grams

Question

Quizplus · Accepted Answer

The balanced chemical equation for the reaction is 2H₂ + O₂ → 2H₂O. The molar mass of O₂ is 32 g/mol, and the molar mass of H₂ is 2 g/mol. With 8 grams of O₂, you have 0.25 moles of O₂, which can react with 0.5 moles of H₂ (1 gram of H₂ per mole). Since you have 8 grams of H₂, which is 4 moles, O₂ is the limiting reactant. 0.25 moles of O₂ will produce 0.5 moles of H₂O, which is 9 grams (since the molar mass of H₂O is 18 g/mol).

How Many Grams of Water, H2O, Can Be Produced by the Reaction

How Many Grams of Water, H₂O, Can Be Produced by the Reaction