2.15 g of CuCO3 is decomposed. What mass of CO2 is produced? What mass of CuO is produced?

Question

B) If 25.00 g of hydrogen gas is produced, how many grams of sodium was reacted?

Answer 1

Let's write the balanced chemical equation first:

CuCO₃ → CuO + CO₂

Since know the mass of CuCO₃, and have the balanced chemical equation, we can determine the mass of CuO and CO₂:

2.15 g CuCO₃ x (1 mol CuCO₃/123.55 g CuCO₃) x (1 mol CuO/1 mol CuCO₃) x (79.545 g CuO/1 mol CuO)

= 1.38 g CuO

2.15 g CuCO₃ x (1 mol CuCO₃/123.55 g CuCO₃) x (1 mol CO₂/1 mol CuCO₃) x (44 g CO₂/1 mol CO₂)

= 0.766 g CO₂