Question

Fill in the blanks using the given data:
The formula of calcium oxide is $CaO$. The atomic mass of $Ca$ is $40$, oxygen is $16$ and carbon is $12$.
i) $1$mole of $Ca$ ( ____g) and $1$ mole of oxygen atom ( ___g) combine to form _____mole of $CaO$ ( ____g).
ii) $1$ mole of $Ca$ ( ___g) and $1$ mole of $C$ ( ___g) and $3$ moles of oxygen atom( ___g) combine to form $1mole$ of $CaC{O}_3$ ( ___g)

Answer 1

According to Law of Chemical combination:

$i)$ $1$ $mole$ of $Ca(40$ $g)$ and $1$ $mole$ of oxygen atom $(16$ $g)$ combine to form $1$ $mole$ of $CaO(56$ $g)$

$ii)$ $1$ $mole$ of $Ca(40$ $g)$ and $1$ $mole$ of $C(12$ $g)$ and $3$ $mole$ of oxygen atom $(48$ $g)$ combine to form $1$ $mole$ of $CaC{O}_3(100$ $g)$