6.4 g of CHOH burns completely in excess oxygen. What mass of carbon dioxide is produced? (H = 1, C = 12, O = 16)
Answer and explanation
Correct answer: A. 8.8 g
- Step 1: Molar mass of CHOH g/mol, so moles mol.
- Step 2: Each mole gives 1 mol of CO, i.e. g.
Answer
8.8 g.
Why not the others: 7.2 g: that is the mass of the other product. 17.6 g: it doubles the correct value. 6.4 g: the mass of fuel is repeated.
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