1.84 g mixture of CaCO₃ and MgCO₃ was heated to a constant weight. The constant weight of the residue was found to be 0.96 g. calculate the percentage composition of the mixture. (Ca = 40 Mg = 24, C = 12, O = 16)
a. CaCO₃ = 54.34%, MgCO₃ = 45.66%
b. MgCO₃ = 54.34%, CaCO₃ = 45.66%
c. CaCO₃ = 45.11%, MgCO₃ = 54.89%
d. MgCO₃ = 73.24%, CaCO₃ = 26.76%