Agas sample at stp contains 1.15 g oxygen gas and 1.55 g nitrogen gas. what is the volume of the gas sample?

Explanation:

The given data is as follows.

        Mass of = 1.15 g

        Mass of = 1.55 g

Therefore, moles of oxygen present will be as follows.

             No. of moles of =

                              =

                              = 0.035 mol

             No. of moles of =

                              =

                              = 0.055 mol

Hence, total no. of moles = moles of + moles of

                              = (0.035 + 0.055) mol

                              = 0.09 mol

Now, it is known that at STP volume is 22.4 L/mol. Hence, volume of the gas sample at STP for 0.09 moles will be as follows.

                      = 2.01 L

Thus, we can conclude that volume of the given gas sample is 2.01 L.