2H₂ + O₂ → 2H₂O. How many grams of water form from 8 g of hydrogen? (H = 1, O = 16)
Answer and explanation
Correct answer: A. 72 g
- Step 1: 8 g of H₂ is 4 mol.
- Step 2: The same moles of water form: 4 x 18 = 72 g.
Answer
72 g.
Why not the others: 144 g, 16 g and 128 g do not fit.
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