Submitted answers shown are incorrect. A 24-cm-diameter cylinder that is 39 cm l

Question

Submitted answers shown are incorrect. A 24-cm-diameter cylinder that is 39 cm long contains 50 g oxygen gas at 20 degree C. Part A How many moles of oxygen are in the cylinder? Express your answer using two significant figures. n = 1.6 mol Part B How many oxygen molecules are in the cylinder? Express your answer using two significant figures. N = 9 A times 10^23 molecules Part C What is the number density of the oxygen? Express your answer using two significant figures. n = 5.3 times 10^25 m^-3 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. p = _____ _____

Explanation / Answer

according to ideal gas principal PV = NRT

P = NRT/V

N = no of moles of oxygen = 50/32 = 1.5625

R = 8.314 J/(K. mol)

T = 273+20 = 293 K

V = volume = 3.14*0.39*(.12)2 = 0.0176 m3

so P = 216264.38 pascals

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