Question

If 1.4g of calcium oxide is formed by the complete decomposition of calcium carbonate, then the amount of calcium carbonate taken and the amount of carbon dioxide formed will be respectively:

Answer 1

Answer:

Chemical reaction for decomposition of calcium carbonate is :

CaCO

3

→CaO+CO

2

Molar mass of CaCO

3

=100g/mol

Molar mass of CaO=56g/mol

Molar mass of CO

2

=44g/mol

According to law of conservation of mass:

Mass of CaCO

3

= Mass of CaO + Mass of CO

2

If we have one mole of calcium carbonate it will decompose to give one mole of calium oxide and one mole of carbon dioxide.

56 g of CaO is obtained from decomposition of 100 g of CaCO

3

.

So 1.4 g of CaO is obtained from decomposition of [(100×1.4)÷56=2.5g] of CaCO

3

.

Mass of CO

2

= (2.5−1.4) g = 1.1 g

please make me brainliest