Question

Hello I need help on the question 3 for chemistry. Also-this is a worksheet for practice! Thank you!

Answer 1

1) List the known and unknown quantities.

Sample: carbon dioxide (CO2).

Volume: 250 mL.

Pressure: 1.0 atm.

Temperature: 22 ºC.

Ideal gas constant:

2) Set the equation

`PV=nRT`

3) Converting units.

3.1-Convert ºC to K.

`K=ºC+273.15`
`K=22\text{ }ºC+273.15=295.15\text{ }K`

3.2-Convert mL to L

1000 mL = 1 L

`L=250\text{ }mL*\frac{1\text{ }L}{1000\text{ }mL}=0.250\text{ }L`

4) Plug in the known quantities