Answer to Question #83969 in General Chemistry for Nazim uddin

Question

What is the molar mass of 3.49 liters equal to? Which is the temperature of 285 K and the pressure of 207.7 kPa weigh 7.88 g?

Answer 1

Answer:

PV = nRT

n = PV/RT

n = 207700*0.00349/8.31*285

n = 0.31 mole

M = m/n

M = 7.88/0.31 = 25.4 g/mole