436 CHAP 1 138. You have two rigid gas cylinders. Gas cylinder A has a volume of 48.2 L and contains N2(g) at 8.35 atm at 25 °C. Gas cylinder B has a volume of 22.0 L and contains He(g) at 25 °C. When the two cylinders are connected with a valve of negligible vol- ume and the gases are mixed, the pressure in each cylinder becomes 8.71 atm. (Assume no reaction when the gases are mixed.) a. How many nitrogen molecules are present? b. What is the total number of moles of N2(g) and He(g) pres- ent after the gases are mixed? c. What was the beginning pressure of cylinder B containing only the He(g) (i.e., before the valve was connected)? lindors were
436 CHAP 1 138. You have two rigid gas cylinders. Gas cylinder A has a volume of 48.2 L and contains N2(g) at 8.35 atm at 25 °C. Gas cylinder B has a volume of 22.0 L and contains He(g) at 25 °C. When the two cylinders are connected with a valve of negligible vol- ume and the gases are mixed, the pressure in each cylinder becomes 8.71 atm. (Assume no reaction when the gases are mixed.) a. How many nitrogen molecules are present? b. What is the total number of moles of N2(g) and He(g) pres- ent after the gases are mixed? c. What was the beginning pressure of cylinder B containing only the He(g) (i.e., before the valve was connected)? lindors were
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter5: Gases
Section: Chapter Questions
Problem 87QAP
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Question
![436
CHAP
1
138. You have two rigid gas cylinders. Gas cylinder A has a volume
of 48.2 L and contains N2(g) at 8.35 atm at 25 °C. Gas cylinder
B has a volume of 22.0 L and contains He(g) at 25 °C. When
the two cylinders are connected with a valve of negligible vol-
ume and the gases are mixed, the pressure in each cylinder
becomes 8.71 atm. (Assume no reaction when the gases are
mixed.)
a. How many nitrogen molecules are present?
b. What is the total number of moles of N2(g) and He(g) pres-
ent after the gases are mixed?
c. What was the beginning pressure of cylinder B containing
only the He(g) (i.e., before the valve was connected)?
lindors were](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1aa358d3-703a-4e19-9633-f6090075d5b1%2F3029b550-6111-4ad4-980c-4e3f1332b626%2Ffupnebv.jpeg&w=3840&q=75)
Transcribed Image Text:436
CHAP
1
138. You have two rigid gas cylinders. Gas cylinder A has a volume
of 48.2 L and contains N2(g) at 8.35 atm at 25 °C. Gas cylinder
B has a volume of 22.0 L and contains He(g) at 25 °C. When
the two cylinders are connected with a valve of negligible vol-
ume and the gases are mixed, the pressure in each cylinder
becomes 8.71 atm. (Assume no reaction when the gases are
mixed.)
a. How many nitrogen molecules are present?
b. What is the total number of moles of N2(g) and He(g) pres-
ent after the gases are mixed?
c. What was the beginning pressure of cylinder B containing
only the He(g) (i.e., before the valve was connected)?
lindors were
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