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Question 25 on the fundamentals F asks to write the empirical and molecular formulas of two molecules (given the picture). The hint says to write the molecular formula first, which is derived from the picture. Although, I am not entirely sure how to get the empirical formula after finding the mass composition and counting the atoms for the molecular formula. How will I find the mass of the empirical formula to do the calculation?
Basically, on that question you count the figures of each type of element. You then have your molecular formula, which would be C4H6Cl2. That would be your molecular formula. Then, you would divide by the greatest common factor. In essence, divide by 2 and you would get C2H3C6, which would be your empirical formula. You don’t need the molar mass in this equation, however if you still want it, you could just use the periodic table at this point and assess its value.
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