A 100 mL flask contained H ₂ at 200 torr, and a 200 mL flask contained He at 100 torr. The two flask were then connected so that each gas filled their combined volume. Assume, no change in temperature, total pressure is

Step-by-step solution

Given, aligned p _ H ₂ & =200 torr V _ H ₂ & =100 ~mL p _ He & =100 torr aligned array rlrl & V _ He & =200 ~mL & & n _ H ₂ & = pV RT = 20000 RT & & n _ He & = pV RT = 20000 RT array Total number of moles = n _ H ₂ + n _ He = 20000 R T + 20000 R T = 40000 R T aligned & Total volume =300 ~mL & Total pressure ( p ) = n V RT aligned aligned & = 40000 RT RT 300 = 400 3 & =133.33 torr aligned