Concept explainers
Interpretation:
The information needed for the chemist to find an empirical formula of an unknown compound should be predicted.
Concept introduction:
The representation of atoms of a compound in simple whole number ratio is known as empirical formula.
Answer to Problem 154A
The percent composition and mass of elements present in the compound should be known.
Explanation of Solution
The rules for determining empirical formula is given as follows:
- Determine the mass of elements in given compound.
- Calculate number of moles using molar mass of each compound or element.
- Divide each number of moles by smallest number of mole value calculated in second step.
- Round the value calculated in step 3 to nearest whole number.
Thus, to find out an empirical formula for an unknown compound, the mass of the elements present in the compound should be known.
Chapter 10 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
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