Question

How many moles of SO2 can be obtained from 3 moles of O2 in the reaction: 4FeS2 + 11O2 = 2Fe2O3 + 8SO2? a. 6 moles of SO2 b. 8 moles of SO2 c. 16 moles of SO2 d. 24 moles of SO2

Answer 1

In the given reaction, 3 moles of O2 produce 8 moles of SO2; therefore, the correct answer is option B, 8 moles of SO2.

Step-by-step explanation:

The balanced chemical equation shows the stoichiometric coefficients, indicating the mole ratios between reactants and products. In this case, the coefficient for O2 is 11, and for SO2, it is 8.

Given the reaction:

4FeS2 + 11O2 → 2Fe2O3 + 8SO2

The mole ratio between O2 and SO2 is 11:8.

To find moles of SO2 produced from 3 moles of O2:

Moles of SO2 = (8/11) * Moles of O2

Substitute the given value:

Moles of SO2 = (8/11) * 3

Calculate:

Moles of SO2 = 24/11

Round off to the nearest whole number:

Moles of SO2 ≈ 2.18

Therefore, the correct answer is option B, 8 moles of SO2.