The insulating and packing material styrofoam is a dating and packing material styrofoam is a polymer of styrene. find the molecular formula of sy ene given its percent composition: 922 775 h the approximate molar mass of styrene is 104 g/mol. a) che bị ch c)c12h d) ch12 e) c8hg

Explanation:

In order to find the molecular formula, we have to find the empirical formula first of all.

It is known that is a styrofoam, elements present are carbon and hydrogen atoms.

Element     %         Atomic mass       Molar ratio           Simple ratio

    C        92.25          12.01               = 7.68                  = 1

     H        7.75            1.008             = 7.68                  = 1

As empirical formula of styrofoam is C_{x}H_{x}.

Hence, empirical mass = (12.01 + 1.008) g/mol = 13.018 g/mol = 13.0 g/mol (approx)

Molar mass given is 104 g/mol.

So,     = = 8

Thus, we can conclude that molecular formula of the given styrene is .

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