Having trouble getting the correct answer on this problem. Ifsomeone could work

Question

Having trouble getting the correct answer on this problem. Ifsomeone could work it out step by step or explain it step by stepI'd greatly appreciate it.
A 19000 mL cylinder containing PF5 at apressure of 152.0 torr is connected by a valve to 850.0 mL cylindercontaining B5H11 at 76.00 torr pressure.Calculate the partial pressure (atm) ofB5H11 when the valve isopened.
A 19000 mL cylinder containing PF5 at apressure of 152.0 torr is connected by a valve to 850.0 mL cylindercontaining B5H11 at 76.00 torr pressure.Calculate the partial pressure (atm) ofB5H11 when the valve isopened.

Explanation / Answer

76.00torr *850.0mL =pB5H11 *(1900.0mL+850.0mL)                             pB5H11= ( 76.00torr *850.0mL) / (1900.0mL+850.0mL)                                          =  23.491torr                                         =   23.491torr *(1atm/760torr)                                         =   0.0309 atm
                 

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