Question

CCH 05 HW 51 of 67> Exercise 5.64-Enhanced- with Feedback Roview1 ConstantsPoriodic Table Part A You may want to reference (Pages 216-222%) Section 5.6 while completing this problem If we connect the two flasks through a stopoock and we open the stopcock, what is the parial pressure of Express the partial pressure in OEr to theee significant figunes. A 295 mL flask contains pure helum at a pressure of 749 torr, A second flask with a volume of 485 mL oontains pare argon at a pressure of 725 torr Submit Request Ansver PartB we connecdt the two flasks prough a stopeock and we open the stopoock, what is the partial pressure of argon? Express the partial pressure in torr to three signiticant figures torr Submit Request Anwer

Answer 1

A)

For He:

Pi = 749 torr

Pf = ?

Vi = 295 mL

Vf = 295 mL + 485 mL

= 780 mL

use:

Pi*Vi = Pf*Vf

749 torr * 295 mL = Pf * 780 mL

Pf = 283 torr

Answer: 283 torr

B)

For Ar:

Pi = 725 torr

Pf = ?

Vi = 485 mL

Vf = 295 mL + 485 mL

= 780 mL

use:

Pi*Vi = Pf*Vf

725 torr * 485 mL = Pf * 780 mL

Pf = 451 torr

Answer: 451 torr

C)

Total pressure = 283 torr + 451 torr

= 734 torr

Answer: 734 torr