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The atmospheric pressure at the surface of Mars is 5.92 × 1023 atm. The Martian atmosphere is 95.3% CO2 and 2.7% N2 by volume, with small amounts of other gases also present. Compute the mole fraction and partial pressure of N2 in the atmosphere of Mars.

Answer :

joseaaronlara

Answer:

The answer to your question is:

a) mole fraction = 0.04

b) pN2 = 40.92 atm

Explanation:

Data

95.3% CO2 = 95.3g CO2

2.7% N2 = 2.7 g N2

MW CO2 = 12 ´+ 32 = 44 g

MW N2 = 2(14) = 28

                  44 g of CO2 ---------------------1 mol

                   95.3 g CO2 -------------------   x

              x = (95.3x1)/44 = 2.17 mol

                 28 g of N2 --------------------  1 mol

                 2.7 g          --------------------   x

                 x = (2.7 x 1)/28 = 0.096 mol

Total mole = 2.17 + 0.096 = 2.27 mole

Mole fraction    xN2 = 0.096 / 2.27 = 0.04

Partial pressure pN2 = 0.04 (1023) = 40.92 atm

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