Styrene and Bromine Reaction: Determining Molecular Formula

[amme636]

Homework Statement

A student allowed a 0.500 gram sample of styrene to react with an excess of bromine.*
An unknown product with a mass of 1.27 grams was obtained.**The student repeated the experiment
several times and always obtained the same result.**What is the likely molecular formula of the product?***
Draw the most likely structure

Homework Equations

The Attempt at a Solution

I'm not really sure what I'm doing here. Is it just C8H8Br2?

 

[Borek]

This is about a simple stoichiometry and ratio of molar masses. Have you tried to write a reaction equation, and check, if C₈H₈Br₂ as a product fits the numbers given in the question?