Question

Un volumen de 1.34 lit de un gas, medido 19°c y 0.97 atm tiene una masa de 2.55 g. Calcula la masa molecular del gas

Answer 1

Ley de los gases ideales

V · P = n · R · T     sustituir n

n = masa/Mm

V · P = masa · R · T           despejar Mm
           ``````````
             Mm

Mm = m · R  · T
         ``````````````
             V · P

R = 0.0821 (L atm/mol K)
T = 19 ºC + 273 = 292 K
P = 0.97 atm
V = 1.34 L
m = 2.55 g

Mm = 2.55 g · 0.0821 (L atm / mol K) · 292 K
         ````````````````````````````````````````````````````````
                          0.97 atm · 1.34 L

Mm = 47.03 g/mol