Question

The reaction :

$2C+O_2\to 2CO$

It is carried out by taking $24$ g of carbon and $96$ g of $O_2$. The mass (in g) of reactant left in excess is ________.

Answer 1

In the given reaction:

$2C+O_2\to 2CO$

2 moles of $C$ is reacting with 1 mole of $O_2$.

or, we can say 24g of $C$ reacts with 32g of oxygen.

The total mass of oxygen = 96 g

Mass of oxygen left after reaction = 96 - 32 = 64 g