Answer :

Final answer:

The empirical formula for a compound with 20.0 g of Ca and 35.5 g of Cl is CaCl2. This was determined by converting the given grams into moles, dividing by the smallest mole value, and obtaining the smallest whole-number multiples for these molar amounts.

Explanation:

The subject of this question is in the realm of Chemistry, specifically dealing with the determination of empirical formulas. An empirical formula of a compound gives the simplest whole-number ratio of the atoms in that compound. In this case, we have 20.0 g of Ca and 35.5 g of Cl. To find the empirical formula:

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