Iron weighing 6.72 g was burned in chlorine Cl2. Calculate the mass of the resulting iron chloride (3) FeCl3.

univerkov | January 17, 2021 | education

given:
m (Fe) = 6.72 g
to find:
m (FeCl3)
decision:
2Fe + 3Cl2 = 2FeCl3
n (Fe) = m: M = 6.72 g: 56 g / mol = 0.12 mol
n (Fe): n (FeCl3) = 2: 2 = 0.12 mol
m (FeCl3) = n * M = 0.12 mol * 162.5 g / mol = 19.5 g
Answer: 19.5 g

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