Question

A 25-cm-diameter cylinder that is 42 cm long contains 60 g of oxygen gas at 20°C. Express your answer using two significant figures. You may want to review (Pages 500 - 502). V AE O ? For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Air in warmed tire. mol Submit Request Answer Part B How many oxygen molecules are in the cylinder? Express your answer using two significant figures. IVO ADO ? molecules Submit Request Answer Part C What is the number density of the oxygen? Express your answer using two significant figures. IVO AEP O ? Submit Request Answer 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. T! HÅR O ? Value Units Submit Request Answer

Answer 1

diameter so of cylinder da 250m radices de 25 cm = 125 on r= 0.125 m Tength of the cylinder l = 42cm = 0.42m mass of oxygen m = 60g = 0.06 kg Temperature on the gas T = 20°C = 293K (A) Since one mal of oxygen has the mass of 329 so there are a n = 60 mola 32 In - 1.875 mal/ B so since there one are mod ... has 6.022x 10 moeales N = 1.875 X 6.022X1023 molecules IN= 1.13x10 molecules

ce since numbes density - number of molecules (N) Volume of gas (V) m3 here V= nr² e V = 3.14 x (0.125) x (0.42 = 0.0206 m3 so 7.13 X 1024 d = 0.0206 dn = 5.485 x 1025 ml ) from gas equation - PV = nRT where pe pressure of gas Ragas constant a 8.314 / mot b = 1.875 X 8.314 x 893 0.0206 4567.50 0-6206 P=2.22X105 Pa = 222 kpal 80 reading of posessuose gauge is 422 kpa.