How many grams of carbon dioxide form when 16 g of methane burns completely? (CH4 + 2 O2 gives CO2 + 2 H2O; C = 12, O = 16, H = 1)
Answer and explanation
Correct answer: C. 44 g
- Step 1: 16 g of CH4 is 1 mole. Step 2. One mole of CO2 forms, with a mass of 44 g. Answer: 44 g. Why not the others: 16 g of methane is 1 mole (16 g/mol), which combusts stoichiometrically to produce 1 mole of carbon dioxide, weighing exactly 44 g (44 g/mol). 88 g is two moles and 22 g is half a mole.
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