MEDIUMMCQ SINGLEJEE Mains ChemistryPhysical ChemistryMole _ Equivalent ConceptAtomic Theory
A sample of CaCO₃ has Ca = 40%, C = 12% and O = 48%. If the law of constant proportions is true, then the mass of Ca in 5 g of CaCO₃ from another source will be :
A.2.0g✓ Correct
B.0.2g
C.0.02g
D.20.0g
Explanation
3 CaCO contains 40% of Ca ∴ wt. of Ca in 5g of 3 5 40 2 100 CaCO x g