Question

how many grams of cl are in a 38.0-g sample of the chlorofluorocarbon c₂f₃cl₃? express your answer in grams of chlorine to three significant figures.

how many grams of cl are in a 38.0-g sample of the chlorofluorocarbon cf₃cl? express your answer in grams for chlorine to three significant figures.

Explanation:

Step1: Calculate molar mass of C₂F₃Cl₃

Atomic masses: C=12.01, F=19.00, Cl=35.45
Molar mass = (2×12.01) + (3×19.00) + (3×35.45) = 24.02 + 57.00 + 106.35 = 187.37 g/mol

Step2: Find mass of Cl in 1 mol of C₂F₃Cl₃

Mass of Cl = 3×35.45 = 106.35 g

Step3: Calculate mass of Cl in 38.0 g sample

Mass of Cl = 38.0 g × ($\frac{106.35}{187.37}$) ≈ 21.6 g

Answer:

21.6