Question

Cuco, CuO + CO2

6) What mass of carbon dioxide is formed when 7.41 g of
copper(II) carbonate decomposes on heating?
NEED HELP ASAP PLS

Answer 1

2.64g

Step-by-step explanation:

The number of moles of CO2 formed is the same as the number of moles of CuCO3, because when one molecule of CuCO3 decomposes it produces one molecule of CO2. So start by working out the number of moles of CuCO3 in 7.41g.

Atomic mass values:

Cu = 63.5 g/mol

C = 12 g/mol

O = 16 g/mol

Answer 2

Reaction

CuCO₃ ⇒ CuO + CO₂

mol CuCO₃ = 7.41 g : Mr CuCO₃ = 7.41 : 123.55 g/mol = 0.06

mol CO₂ = mol CuCO₃ = 0.06

mass CO₂ = mol x Mr CO₂ = 0.06 x 44 g/mol = 2.64 g