1. The problem statement, all variables and given/known data At T1 the root mean square speed (rms) of compound P is 485.2 m s-1 and at T2 the rms speed is 504.1 m s-1. Using this data and the fact that T2 – T1 = 24.0 °C, determine the molar mass of P in g mol-1. 2. Relevant equations From problem statement you have: (3·R·T1/M)1/2 = 485.2 and (3·R·T2/M)1/2 = 504.1 You also have that T2 - T1 = 24.0 °C ≡ 24.0 K Together, (1) and (2) form a system of 3 algebraic equations with 3 unknowns (T1, T2 and M) that can be easily solved Solve the equation system by first calculating T1 and T2 Once T1 and T2 are known use one of the expression in (1) to calculate M 3. The attempt at a solution I have the 3 equations: 485.2 = (3RT1/M)^0.5 504.1 = (3RT2/M)^0.5 T2 – T1 = 24 K I have squared these equations, (rms)^2 = 3RT/M, in order to eliminate the square root to make the equation as simple as possible, however that is all I have so far and do not understand how to calculate M with two three unknown variables T1, T2 and M. Could you please give me some assistance?