Mastering Chemistry Homework Question, Help!!! Chlorine is widely used to purify

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Mastering Chemistry Homework Question, Help!!!

Chlorine is widely used to purify municipal water supplies and to treat swimming pool waters. Suppose that the volume of a particular sample of Cl2 gas is 8.60 L at 895 torr and 22 ?C.

Number 10 Part A Chlonine is widely used to purify municipal water supplies and to treat swimming pool waters. Suppose that the volume of a particular sample of Cl2 gas is 8.60 L at 89 torr and 22 C How many grams of Cl2 are in the sample? Submit My Answers Give Up Part B What volume wil the CI, oupy at STP? V- Submit My Answers Give Up Part C At what temperature will the volume be 15.10 L if the pressure is 874 torr? Submit My Answers Give Up Part D At what pressure will the volume equal 5.90 L if the temperature is 54 °C atm Submit My Answers Give Up

Explanation / Answer

A)
P = 895 torr = 895/760 atm = 1.18 atm
V = 8.60 L
T = 22 oC= (22+273.15) K = 295.15 K
use:
P*V = n*R*T
1.18*8.60 = n*0.0821*295.15
n = 0.419 mol

molar mass of Cl2 = 71 g/mol

mass = molar mass * number of moles
= 71 * 0.419
= 29.7 g

B)
1 mol at STP = 22.4 L
0.419 mol = 22.4 * 0.419 L =9.4 L

C)
V2 = 15.10 L
P2 = 874 torr
use:
P1*V1/T1 = P2*V2/T2
895*8.60/295.15 = 874*15.10/T2
T2 = 506 K

D)
T2 = 54 oC = (54+273.15) K =327.15 K
P1*V1/T1 = P2*V2/T2
895*8.60/295.15 = P2*5.90/327.15
P2 = 1446 torr
= 1446/760 atm
= 1.9 atm

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