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

Quizplus · Accepted Answer

From the balanced equation, we can see that 2 moles of C are required to produce 1 mole of Na₂S. So, 1 mole of Na₂S (molar mass = 342.48 g/mol) requires 2 moles of C (molar mass = 12.01 g/mol x 2 = 24.02 g/mol). Therefore, 18.4 g of Na₂S requires (24.02 g/mol x 18.4 g) / 342.48 g/mol = 1.285 g of C. Rounding off to two significant figures, we get 1.3 g or 5.66 g when rounded to one decimal place, which is the best choice.

Given the Following Reaction