N2O4(g) 2NO2(g) is 50\% dissociated at a certain temperature and pressure. Taking the molar mass of N2O4 as 92 g/mol, the average molar mass of the equilibrium mixture in g/mol is

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$N X_{2} O X_{4} (g) 2 NO X_{2} (g)$ is 50\% dissociated at a certain temperature and pressure. Taking the molar mass of $N X_{2} O X_{4}$ as $92 g/mol$ , the average molar mass of the equilibrium mixture in $g/mol$ is

Starting with 1 mol, total moles are

1 + α = 1.50

while the mass stays

92

g. Average molar mass

= 92/1.5 = 61.3 g/mol