Question

The mass of a 1.0 L sample of a gas is 0.716 g at STP. What is the molar
mass of the gas?​

Answer 1

Answer: 16.1 g/mol

Step-by-step explanation:

P - the pressure of the gas

V - the volume it occupies

n - the number of moles of gas

V= 1.0L

P= 1atm

T=273.15k

PV= nRt

n=
`(PV)/(RT)`

=
`((1atm)(1.0L))/((0.0821(L*atm)/(molk) )(273.15K))`

n=0.04459mol

Molar mass:
`(grams)/(mol)`

=
`(0.716g)/(0.04459 mol)`

Molar mass: 16.1 g/mol