Question

What is the volume (in litres) of oxygen at STP to completely convert $1.5$ mol of sulphur into sulphur dioxide?
A) $11.2$
B) $22.4$
C) $33.6$
D) $44.8$

Answer 1

The air is nothing but a mixture of the gases. The mixture of the gas in the air are major in the form of nitrogen, oxygen, carbon dioxide and other gases. In the atmosphere approximately $78\%$of nitrogen, $21\%$ of oxygen and remaining $1\%$of other gases in the world. The symbol of nitrogen is ${\text{N}}$and oxygen is${\text{O}}$. The natural form of nitrogen and oxygen gases are diatomic. The symbol of diatomic nature of nitrogen and oxygen gases are ${{\text{N}}_2}$and${{\text{O}}_{\text{2}}}$.
Formula used:
The volume of oxygen at STP is equal to the product of the number of the moles and standard volume at STP.
${\text{The volume of oxygen at STP = The number of the moles}} \times {\text{Standard volume at STP}}$

Complete answer:
The chemical reaction of sulphur into sulphur dioxide is given below,
$S + {O_2} \to S{O_2}$
Sulphur is reacted with oxygen molecules to give sulphur dioxide as the product of the reaction.
The volume of oxygen involved in the chemical reaction is calculate as,
The volume of oxygen at STP is equal to the product of the number of the moles and standard volume at STP.
${\text{The volume of oxygen at STP = The number of the moles}} \times {\text{Standard volume at STP}}$
The number of the moles of oxygen is involved in the chemical reaction is $1.5$ mol.
$= 1.5 \times 22.4 = 33.6$
According to the above discussion, we conclude that the volume (in litres) of oxygen at STP to completely convert $1.5$ mol of sulphur into sulphur dioxide is $33.6$litres.

So, the correct answer is “Option C”.

Note:
As we know that air is one of the important things in our life. In the world, without air nothing is surveyed. For human beings, breathing purpose air is the important thing for inhaling and exhaling. For human respiration, oxygen is used for inhalation of breathing and carbon dioxide is exhaled gas. This inhale and exhale gas are important for human lifestyle to survey in the world. Each and every gas has unique properties and unique nature in the atmosphere. One gas is not able to replace another gas in the environment.