For the reaction? S + ? O2 →? SO3, balance the equation. If four moles of sulfur (S) are combined with six moles of oxygen molecules (O2), how many moles of SO3 will be produced? 1. three 2. five 3. four 4. one 5. six 6. two 7. seven

Question

Chapman

Chemistry

17 February, 16:03

For the reaction? S + ? O2 →? SO3, balance the equation. If four moles of sulfur (S) are combined with six moles of oxygen molecules (O2), how many moles of SO3 will be produced? 1. three 2. five 3. four 4. one 5. six 6. two 7. seven

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Valerie Spencer · Answer 1

3. four

Explanation:

balanced equation:

2S + 3O2 → 2SO3

∴ moles (n) S = 4 mol

∴ n O2 = 6 mol

limit reagent: S

⇒ mol SO3 = (4 mol S) * (2 mol SO3 / 2 mol S)

⇒ n SO3 = 4 mol SO3