Question

The reaction :

$2C+O_2\to 2CO$

is carried out by taking $24g$ of carbon and $96$ g $O_2$. The amount of other reactant in grams that should be taken so that nothing is left at the end of the reaction is :

Answer 1

$2C+O_2\to 2CO$

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

24g of crbon will react with 32g of oxygen.

Amount of oxygen left $=96-32=64g$

So, to complete the reaction, the amount of carbon required to react with with 64 g of oxygen = 48g

So, we need extra 48 g of carbon to complete the reaction and nothing will left at the end of reaction.

So, total mass of C to be taken is 72g