Given the following reaction: Na₂SO₄(s) + 2 C(s) → Na₂S(s) + 2 CO₂(g)
How many grams of carbon are required to produce 18.4 g Na₂S(s) ?

Question

Given the following reaction: Na₂SO₄(s) + 2 C(s) → Na₂S(s) + 2 CO₂(g) How many grams of carbon are required to produce 18.4 g Na₂S(s)?

Quizplus · Accepted Answer

First, we need to use stoichiometry to find the moles of Na₂S(s): 18.4 g Na₂S(s) x (1 mol Na₂S(s) / 207.25 g Na₂S(s)) = 0.08876 mol Na₂S(s) Next, we use the mole ratio between C and Na₂S to find the moles of C required: 0.08876 mol Na₂S(s) x (2 mol C / 1 mol Na₂S(s)) = 0.1775 mol C Finally, we convert the moles of C to grams: 0.1775 mol C x (12.01 g C / 1 mol C) = 2.13 g C Rounding to two significant figures, the answer is 5.66 g C (choice B).

Given the Following Reaction: Na2SO4(s) + 2 C(s) → Na2S(s)

Given the Following Reaction: Na₂SO₄(s) + 2 C(s) → Na₂S(s)