Question

A gaseous compound composed of sulfur and oxygen has a density of 9.88 g/L at stp. What is the molar mass of this gas?

Answer 1

Answer: The molar mass of this gas is 221 g/mol

Step-by-step explanation:

The relation between density and molar mass is :

`PM=dRT`

where P = pressure of gas = 1 atm (at STP)

M = molar mass of gas = 32 g/mol

d = density of gas = ?

R = gas constant =
`0.0821Latm/Kmol`

T= temperature of gas = 273 K ( at STP)

`1atm* M=9.88g/L* 0.0821Latm/Kmol* 273K`

`M=221g/mol`

Thus the molar mass of this gas is 221 g/mol