Question

if Calcium is completely burnt in air, it produces Calcium oxide. Calculate the mass of oxygen required in the process. (Ca = 40, O = 16)​

Answer 1

Explanation:

bChemical reaction involved is:

CaCO

3

→CaO+CO

2

Molar mass of CaCO

3

=40+12+16×3=100 g

According to the balanced reaction 100 g of CaCO

3

produces 1 mol of CO

2

i.e. 22.4 L at STP.

∴50 g CaCO

3

will produce

100

22.4

×50=11.2 L CO

2

at STP.