Question

16. A sample of pure calcium weighing 1.35 g wasquantitatively converted to 1.88 g of pure Cao.Atomic mass of calcium is(1) 20Y 40(3) 60(4) 30​

Answer 1

Answer:

40

Explanation:

2Ca+O2-----→2CaO

1mole calcium give 2 mole calcium oxide

1mole CaO produced by 0.5 moles of Ca

1mole CaO = 56g

1.88/56= 0.5 *1.35/x

x= 20.4