Rearrange the ideal gas equation (PV=nRT) to give the following expressions:?

Question

Rearrange the ideal gas equation (PV=nRT) to give the following expressions:
Keep in mind that the formula is interpreted from left to right with operations in parentheses done first. Add parentheses if needed.
A) n = ?
Equation:
B) An equation that relates V and n when P and T are constant. Give the expression involving V and n which is equal to a constant. There are two equivalent answers, one the reciprocal of the other. Choose the answer with V in the numerator.
Equation:
C) n/V = ?
Equation:

Answer 1

This is basic algebra. Just remember that whatever you multiply or divide from one side you have to do the same to the other side to keep the equation valid.

Answer 2

Actually the ideal gas equation is PV = nRT. This equation was derived from the assumption (postulates) that the volume of a gas molecule is negligible when compared to the total volume. But volume of a molecule have to be considered. ie what as volume was a little bit higher. so in corrected ideal gas equation we have to deduct the extra bit (volume of a molecule) of the volume. In case of pressure we considered that the collision b/w the molecules was perfectly elastic (no energy transfer). In reality molecules experience a force of attraction b/w them. hence they do not collid as fast as that we assumed earlier. ie molecules collid with the walls of the container with a lesser force(low pressure). So we have to add a quantity to make ideal pressure

Answer 3

A) n = (PV)/(RT)

B) you cant hold P & T constant but any way in equation form : V/n = [(RT)/P] = const

C) n/V = P/(RT)

Answer 4

A) n=(PV)/(RT)

B) V/n=(RT)/P

C) n/V=P/(RT)

Answer 5

a) n = (PV) / (RT)

b) (V / R) = n

c) (n / V) = P / (RT)