Question

un volumen de 3.24 litros de un gas medidos a 124 grado c y 644 mmhg pesa 3.86 g . encuentre el peso molecular del gas .

Answer 1

V  x P =  n x R x T

R = 0.0821 ( L atm/molK)
T = 124 + 273 = 397 K
P = 644 mmHg

1 atm ---- 760 mmHg
   x     ----  644 mmHg

x = 0.847 atm

V = 3.24 L

n (mol) = masa/Mm

n = V x P
     ````````
       R x T

n =      3.24 L  X  0.847  atm
         ````````````````````````````````
   0.0821 ( L atm/molK) 397 K

n(mol) = 0.0842

Mm = masa
         ``````````
           mol

Mm = 3.86 g
         ``````````
         0.0842 mol

Mm = 45.84 g/mol