Question

24g of carbon reacts with some oxygen to make 88 grames of carbon dioxide. Find out how much oxygen must have been used.

Answer 1

Answer:

64grams

Explanation:

Applying law of conservation of mass!

Answer 2

Given:-

• Mass of Carbon = 24g
• Mass of Carbon dioxide = 88g

To find:-

• Mass of oxygen used.

Assumption:-

Let the mass of oxygen be x

Answer:-

According to the law of conservation of mass, The total number of atoms on the reactant side will be equal to the total number of atoms on the product side

Therefore,

$\sf{24 + x = 88}$

=>$\sf{ x = 88-24}$

=> $\sf{x = 64}$

Therefore, The mass of oxygen used is 64g

Important note:-

Law of conservation of mass:- It states that an atom can neither be created nor be destroyed in a chemical reaction. That is the total number of atoms on the reactant side will always be equal to the total number of atoms on the product side. Also the number of atoms of each individual element of the reactant side will also be equal to the number of atoms of each individual element on the product side.