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A 10.0-L cylinder is filled with 19.0 grams of nitrogen dioxide gas (N2O) at 15.0°C. What...

A 10.0-L cylinder is filled with 19.0 grams of nitrogen dioxide gas (N2O) at 15.0°C. What is the pressure inside the cylinder?

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Homework Answers

Answer #1

Molar mass of NO2 = 1*MM(N) + 2*MM(O)

= 1*14.01 + 2*16.0

= 46.01 g/mol

mass of NO2 = 19.0 g

we have below equation to be used:

number of mol of NO2,

n = mass of NO2/molar mass of NO2

=(19.0 g)/(46.01 g/mol)

= 0.413 mol

we have:

V = 10.0 L

n = 0.413 mol

T = 15.0 oC

= (15.0+273) K

= 288 K

we have below equation to be used:

P * V = n*R*T

P * 10 L = 0.413 mol* 0.0821 atm.L/mol.K * 288 K

P = 0.977 atm

Answer: 0.977 atm

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