Question

Calculate the mass % of each element present in the molecule of calcium carbonate

Answer 1

Molecular formula of calcium carbonate = c a c o 3

Molecular mass of CSE O3 = 1 into C A + 1 into C + 3 into o

Answer 2

Given: Calcium carbonate.

To find: We have to find the mass % of each element present in the molecule of calcium carbonate.

Solution:

The formula of calcium carbonate is $CaCO_3$.

The atomic weight of Ca is 40 and C is 12.

The atomic weight of Oxygen is 16.

The molecular weight of calcium carbonate is 40+12+16×3= 100g.

Thus the mass percentage of Ca is-

$\frac{40}{100} \times 100 = 40\%$

Thus the mass percentage of C is-

$\frac{12}{100} \times 100 = 12\%$

Thus the mass percentage of Oxygen is-

$\frac{48}{100} \times 100 = 48\%$

The mass % of each element present in the molecule of calcium carbonate is 40%, 12% and 48%.