(a)
Interpretation: The empirical formula of a compound containing 0.40 mol of Cu and 0.80 mol of Br needs to be determined.
Concept Introduction: For any compound, the empirical formula shows the simplest ratio of atoms of different elements present in the compound.
(a)
Explanation of Solution
The number of moles of Cu is 0.40 mol and that of Br is 0.80 mol. The simplest ratio of the number of moles of both elements can give the empirical formula of the compound. Thus,
Therefore, the empirical formula of the compound will be
(b)
Interpretation: The empirical formula of a compound containing 4 atoms of carbon for every 12 atoms of hydrogen needs to be determined.
Concept Introduction: According to
(b)
Explanation of Solution
According to the question, the number of atoms of C and H is 4 and 12 respectively. This can be said that C and H are in the 4:12 ratio.
Therefore, the empirical formula of compound is
Chapter 10 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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