Question

an unknown gas has 1.96 g/l density then gas is​

Answer 1

Answer:

1.96 x (pres factor) x (Temp factor) =

1.96 g/L x (0.855/1) x (273/298) = ?

How does the shorter way work?

P factor. P decreases therefore L increases and density gets smaller so the factor must be less than 1 which makes the small number go in the numerator.

T factor. T increases from 273 to 298, L must increase, larger L means smaller density so the T factor must be less than 1 which makes the small number go on top.

m / V = M / 22.4

and m / v = D so

D = M / 22.4

1.96 = M / 22.4

M = 43.9 g/mol

which is about the M of CO2

Explanation: