Question

'X' grams of calcium carbonate was heated completely in air. The weight of the solid residue forme
is 28 g. What is the value of 'x' in grams?
1) 44
2) 200
3) 150
4) 50​

Answer 1

answer ..50

Explanation:

CaCO

3

→CaO+CO

2

(g)

1molCaO=1mol of CaCO

3

Molar mass of CaO=56.1 g/mol

Molar mass of CaCO

3

=100 g/mol

Mass of CaCO

3

that produces 28g of CaO

=(28∗100)/56.1=49.9g