An iron ore is known to contain 70.0% Fe2O3. The obtain from 80kg of the...

Chemistry

JAMB 1991

An iron ore is known to contain 70.0% Fe₂O₃. The obtain from 80kg of the ore is?

(Fe = 56, O = 16)

A. 35.0 kg
B. 39.2 kg
C. 70.0 kg
D. 78.4 kg

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Correct Answer: Option B

Explanation

2Fe₂O₃ → 4Fe + 3O₂
320g 224g 96g
(70) / (100) x (80) / (1) 56g
if 0.32kg of Fe₂9₃ contains 0.224 kg
Then 56kg will contain (56 x 0.224) / (0.32) =39.2 kg

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An iron ore is known to contain 70.0% Fe2O3. The obtain from 80kg of the...

Correct Answer: Option B

Explanation

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