Question

A sample of gas has a mass of 0.565 g . Its volume is 115 mL at a temperature of 83 ∘C and a pressure of 779 mmHg . Find the molar mass of the gas.

Answer 1

PAS mass of yous = 0.565 gom V- 115 m 0.115 L - 13' - 83'+ 233.кг 356 -1 к P: 779 mm ty 19 mm на I wlm 134 mmy a alm a ahn - 779 mming 6. mmHa " x wlm =P = 1.025 R=0.082057 Lahm met alm et As we know ideal yeu equuhen PV = nRT -, т. Pv 2-т n= 1.025 alm x 0.115 О. ogzog L cm - ne) L - x 35- 1 O-11982 mo 29- 224 = 0. Оо33 na number of mores a muss morar mass

. Molur muss = mo number of mole = 0.556 gm - 0.004033 mol = 137.86 gm lmos, : Molus muss of ges= 137.86 gm mole