Which equation agrees with the ideal gas law?

Answer :  P_{1}V_{1}/T_{1} = P_{2}V_{2}/T_{2}

Explanation : The ideal gas law, states that PV = nRT;

where, P is pressure;

V is volume;

n is number of moles

R is gas constant

T is temperature

If there are two entities to be compared then, it can be compared as,

P_{1}V_{1}/T_{1} = P_{2}V_{2}/T_{2} ;

as n and R can be considered as a constant.

Therefore, at constant pressure, the equation will get modified as;

V_{1}/T_{1} = V_{2}/T_{2}