
Concept explainers
Interpretation : The mass of copper and the product formed by their reaction is given. The empirical formula of the compound is to be determined.
Concept Introduction : The formula that determines the proportion of the elements that is present in a compound is defined as empirical formula. It does not state the actual number of atoms that is present in the compound.
The number of moles is calculated as shown below.

Answer to Problem 4RQ
The empirical formula of given compound is
Explanation of Solution
Given information : The mass of copper is
The general formula for given compound is
The molar mass of copper is
Substitute given mass and molar mass of copper in above formula to calculate its moles.
Substitute given mass and molar mass of oxygen in above formula to calculate its moles.
Divide the number of moles of copper and oxygen with the smallest of number as shown below.
The formula thus comes out to be
The empirical formula of given compound is
Chapter 6 Solutions
World of Chemistry, 3rd edition
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