Answer to Question #251282 in General Chemistry for nicole

Question

1.  A 10.0-liter flask contains  0.400 mole of H2, and 0.300 mole of  N2 at 20°C. 

(a) What is the pressure, in atmospheres, inside the flask?

(b) Calculate the mole fractions of the three gases?

Answer 1

Moles of Nitrogen = 0.3

Moles of hydrogen = 0.4

Volume = 10 L

Temperature = 20 + 273 = 293 K

PV = nRT

Partial pressure of Nitrogen = 0.3×0.0821×208/10= 0.512atm

Partial pressure of hydrogen= 0.4×0.0821×208/10= 0.68atm

Total pressure = 0.512+0.68= 1.192atm