In 2 H2 + O2 -> 2 H2O, how many grams of water form from 12 g of hydrogen (H = 1, O = 16), with oxygen in excess?
Answer and explanation
Correct answer: C. 108 g
- Step 1: 12 g of H2 is 6 mol; the equation gives equal moles of water.
- Step 2: 6 mol x 18 g/mol = 108 g.
Answer
108 g.
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