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What is $ n $ in the equation of the ideal gas law?

Answer
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Hint :We know that the ideal gas law, also called the general gas equation, is the equation of state of a hypothetical ideal gas. It is a good approximation of the behavior of many gases under many conditions, although it has several limitations.

Complete Step By Step Answer:
The ideal gas law equation represents the application of a combination of different gas laws which deals with ideal gasses. It can be used to generalize the behavior of gasses in different conditions. The ideal gas law equation shows the relation between pressure, volume, number of moles and temperature of a gas.
We have been provided with ideal gas equation, : Where $ P\text{ }= $ pressure, $ V\text{ }= $ volume, $ n\text{ }= $ amount of substance, $ R\text{ }= $ gas constant, $ T\text{ }= $ temperature. We need to tell that the value of universal gas constant would depend upon which of the following factors, so for that, an ideal gas is a gas that conforms, in physical behavior, to a particular, idealized relation between pressure, volume, and temperature called the ideal gas law.
A gas does not obey the equation when conditions are such that the gas, or any of the component gases in a mixture, is near its condensation point. The ideal gas law relates the four independent physical properties of a gas at any time. The ideal gas law can be used in stoichiometry problems in which chemical reactions involve gases. Standard temperature and pressure (STP) are a useful set of benchmark conditions to compare other properties of gases.
The value n is the amount of the gas measured as moles. One may need to convert a mass to moles by dividing the given mass of the gas by the molar mass of the gas to get moles. The ideal gas law constant is a combination of these values based upon the volume of one mole of a gas at Standard Temperature and Pressure (STP).

Note :
Boyle's law, Charles’ law and Avogadro's law are known as ideal gas laws as they deal with ideal gases. The ideal gas equation is a good approximation of behavior of many gases under many different conditions. The value of universal gas constant is $ 8.31kJmo{{l}^{-1}}{{K}^{-1}} $ .