Question

Calculate the number of moles of O2 gas held in a sealed 2.00 L tank at 3.50 atm and 25 ℃.

Answer 1

`n=0.286mol`

Step-by-step explanation:

Hello,

In this case, we consider oxygen as an ideal gas, for that reason, we use yhe ideal gas equation to compute the moles based on:

`PV=nRT\\\\n=(PV)/(RT)`

Hence, at 3.50 atm and 25 °C for a volume of 2.00 L we compute the moles considering absolute temperature in Kelvins:

`n=(3.50atm*2.00L)/(0.082(atm*L)/(mol*K)(25+273)K) \\\\n=0.286mol`

Best regards.