First, we have to establish that the **sum of the percentages is 100% of the sample**. Now if we **assume** that we have a total of **100g of the sample**, this means that the percentages of each element will just be the **same value in grams**.

From the mass, we can now divide by molar mass to get the moles:

A compound contains 47.08% carbon, 6.59% hydrogen, and 46.33% chlorine by mass; the molar mass of the compound is 153 g/mol. What are the empirical and molecular formulas of the compound?

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Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition practice problems.