If 3.67 g of CO_2 gas is introduced into an evacuated 2.50 L flask at 65 degreeC

Question

If 3.67 g of CO_2 gas is introduced into an evacuated 2.50 L flask at 65 degreeC, what is the pressure inside the flask? (R = 0.08206 L atm/mol. K) Calculate the density (in g/L) of carbon monoxide gas at 21 degreeC and 215 mm Hg. (R = 0.08206 L atm/mol. K) Sodium azide decomposes rapidly to produce nitrogen gas. 2 NaN_3(s) rightarrow 2 Na(s) + 3 N_2(g) What mass of sodium azide will inflate a 56.6 L airbag for a car to a pressure of 811 mm H_g at 25 degreeC? (R = 0.08206 L atm/mol. K) A mixture of He and CO_2 is placed in a 7.50 L flask at 22 degreeC. The partial pressure of the He is 2.2 atm and the partial pressure of the CO_2 is 1.9 atm. What is the mole fractions of He?

Explanation / Answer

23.

m = 3.67 g of CO2

mol = m/MW = 3.67/44 = 0.083409

V = 2.5L

T = 65°C = 65+273 = 338K

P =

Apñlyl ideal gas law

PV = nRT

P = nRT/V = 0.083409*0.082*338/(2.5) = 0.924705 atm

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