Question

If you collect 1.75 L of hydrogen gas during a lab experiment, when the room temperature is 23ºC and the barometric pressure is 105 kPa, how many moles of hydrogen will you have?

Answer 1

`n=0.0747mol`

Step-by-step explanation:

Hello,

In this case, since we can consider hydrogen gas as an ideal gas, we check the volume-pressure-temperature-mole relationship by using the ideal gas equation:

`PV=nRT`

Whereas we are asked to compute the moles given the temperature in Kelvins, thr pressure in atm and volume in L as shown below:

`n=(105kPa*(0.009869atm)/(1kPa)*1.75L)/(0.082(atm*L)/(mol*K)*(23+273.15)K) \\\\n=0.0747mol`

Best regards.