Question

In $CaC{O}_3$, the percentage of $Ca$ is__________.

Answer 1

$CaC{O}_3$

Molecular weight= $100$

Each mole of $CaC{O}_3$ contains $1$ mole of Calcium=$1\times 40=40g$ [$40$ is mass of calcium]

$\therefore$ This amount of calcium is present in $100g$ of $CaC{O}_3$

$\therefore$ Percentage of $Ca=\frac{40}{100}\times 100=40$%

$40$% of Calcium is present in $CaC{O}_3$.