Question

Find the mass of oxygenpresent in 1.5 gram of calcium oxide

Answer 1

Formula of Calcium Oxide = CaO

16 g of Oxygen are present in 56 g of CaO

Hence, 1 g of Cao Contains 16/56 g of Oxygen

So, 1.5 g of CaO contains 16*1.5/56 = 0.428 g of Oxygen