The number of moles of chlorine atoms in 12.5 g of carbon tetrachloride is ________.

Question

Quizplus · Accepted Answer

1 mole of carbon tetrachloride (CCl4) contains 4 moles of chlorine atoms.

Molar mass of CCl4 = 12.01 + 4(35.45) = 154.01 g/mol

Number of moles of CCl4 = mass/molar mass = 12.5/154.01 = 0.0812 mol

Number of moles of chlorine atoms = 4 x number of moles of CCl4 = 4 x 0.0812 = 0.3248 mol

Rounding off to 3 significant figures, the answer is 0.325. Therefore, the correct choice is (C).

The Number of Moles of Chlorine Atoms in 12