Question

If a 2.50 liter container is filled with Ne gas at a pressure of 650 mm Hg and at 25°C, what mass of Ne is in the container?

Answer 1

1.76 g is the mass of Ne is in the container.

Step-by-step explanation:

We use the equation given by ideal gas which follows:

`PV=nRT`

where,

P = pressure of the gas = 650 mm Hg

V = Volume of the gas = 2.50 L

T = Temperature of the gas =
`25^oC=[25+273]K=298K`

R = Gas constant =
`62.3637\text{ L.mmHg }mol^(-1)K^(-1)`

n = number of moles of Ne gas = ?

Putting values in above equation, we get:

`650mmHg* 2.50L=n* 62.3637\text{ L.mmHg }mol^(-1)K^(-1)* 298K\\\\n=(650* 2.50)/(62.3637* 298)=0.0874mol`

Also, molar mass of Ne = 20.1797 g/mol

So,
`Mass = Moles* Molar\ mass = 0.0874* 20.1797 g = 1.76\ g`

1.76 g is the mass of Ne is in the container.