How many ethyne molecules are contained in 84.3 grams of ethyne (c2h2)?

Explanation:

According to the mole concept, there are atoms or molecules present in 1 mole.

As, it is given that mass of ethyne is 84.3 g. Hence, calculate its number of moles as follows.

          No. of moles =

                                 =

                                 = 3.24 mol

Therefore, calculate number of ethyne molecules as follows.

                  atoms

                    = atoms

Thus, we can conclude that there are atoms in 84.3 grams of ethyne.