Question

a mixture of CaCO3 and CaO has a mass of 3.250g. After heating, the mass of the sample is reduced to 2.664g. What is the mass percent of CaCO3 in the mixture?

Answer 1

Answer:

40.92%

Explanation:

CaCo₃(s)-->CaO(s)+CO₂(g)

mass of Co2(g)= 1.33grams

mass of CaO(s)=(3.25-1.33)=1.92grams

mass % of CaCO₃ = $(\frac{1.33}{3.25} )$×100%

40.92%