AT&T; 11:04 PM session. masteringphysics.com C Problem 18.24 Enhanced- with Feed

Question

AT&T; 11:04 PM session. masteringphysics.com C Problem 18.24 Enhanced- with Feedback A 22-cm-diameter cylinder that is 39 cm long contains 56 g of oxygen gas at 20 C You may want to review ( pages 500-502 Part A How many moles of oxygen are in the cylinder? Express your answer using two significant figures My Answers Give Up Submit Correct Here we learn how to find the number of moles of a gas if we know its mass Part B How many oxygen molecules are in the cylinder? Express your answer using two significant figures. Correct Here we learn how to find the number of molecules in the gas if we know its mass. Part C What is the number density of the oxygen? Express your answer using two significant figures. n· 18.4·1025 Submit My Answers Give Up Part D What is the reading of a pressure gauge attached to the tank? Express your answer to two significant figures and include the appropriate units. PValve Units Submit My Answers Give Up

Explanation / Answer

Since answers given in part a and b are not visible, I took the best visible values as per my knowledge. In case any difference in my considered value, you can put your values. Procedure is correct..

c) V= r2L = (0.11 m)2(0.39 m) = 0.015 m3

(N/V) = (1.1 x 1024 molecules)/(0.015) = 7.42 x 1025 m-3

d) P = nRT/V = (1.8 mol x 8.314 x 293)/0.015 = 292.32 kPa

Pg = P - 1 atm = 292.32 kPa - 101 kPa = 191.32 kPa

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