Question

what is the ideal gas constant?
a. it is a specific constant for a particular gas.
b. it is a constant that depends on the conditions.
c. it is a universal constant used for all gases.
d. it is a constant that applies only at stp.

Explanation:

The ideal gas constant, denoted as $R$, is a universal constant used in the ideal - gas law ($PV = nRT$) and is the same for all ideal gases, regardless of the type of gas or the conditions (other than the units in which it is expressed). It does not change with the gas type or typical conditions and is not only applicable at STP (standard temperature and pressure).

Answer:

C. It is a universal constant used for all gases.