Question

What volume of nitrogen monoxide is produced when 146L of ammonia react according to the following reaction? (All gases are at the same temperature and pressure.)

Answer 1

Hint: Before answering this question, we should first know that We have to first convert the word equation into a balanced chemical equation. Ammonia reacts with Oxygen gas to form nitric oxide and water vapor. The other name of it is Nitrogen monoxide.

Complete answer:
STP refers to the abbreviation for Standard temperature and Pressure in chemistry. When we do calculations on gases like gas density. 273 K/ 0$^{\circ }C$/ 32$^{\circ }F$ is the standard temperature and 1 atm pressure is the standard pressure. It is the freezing point of pure water at sea level atmospheric pressure. One mole of gas occupies 22.4 L of molar volume at STP.
 The balanced equation of the reaction is:
$4N{{H}_{3}}(g)+5{{O}_{2}}(g)\to 4NO(g)+6{{H}_{2}}O(g)$
We can see that to form 4 moles of nitric oxide, 4 moles of ammonia needs to be consumed in the reaction. It shows that if we have enough supply of oxygen in the reaction, then the number of moles of ammonia consumed is equal to the number of moles of Nitric oxide produced.
As it is mentioned in the question that all the gases are kept under the same conditions for pressure and temperature, The mole's ratio can be expressed in terms of the volume that is occupied by gas.
It can be also explained in this manner that the reaction has oxygen gas available i.e 5 L, it is consuming 4 L of ammonia and it forms 4 L of nitric oxide.
Like in this reaction, we have an excess of oxygen gas
Therefore,
 $146L\,N{{H}_{3}}\times \dfrac{4L\,NO}{4L\,N{{H}_{3}}}=146L\,NO$

Note:
Uses of STP are: To express the fluid flow rate and the volumes of liquids and gases, STP is important. The gases and liquids are dependent on pressure and temperature. It can only be applied if standard state conditions are applied in the question. The conditions like standard pressure and temperature. It could be acknowledged by the superscript circle.