Concept explainers
Interpretation:
The element chromium forms three different oxides (contains only chromium and oxygen). The percentage of chromium (number of grams of chromium in
Concept Introduction:
Law of multiple proportions:
Compounds are made up of atoms of different elements. Some compounds are made up of same elements. The law of multiple proportions states that, when two elements are combined to form more than one compound, the mass of one element is fixed and the mass of the other element will be a ratio of whole number.
For example, carbon monoxide (
Explanation of Solution
The given three different proportions of chromium in
The mass of the oxygen can be calculated by subtracting the chromium from
In compound 1:
In compound 2:
In compound 3:
The oxygen mass is made same in all compounds as in compound 1.
From the above oxygen mass, the mass of chromium in each sample is determined.
In compound 1:
The mass of oxygen is
In compound 2:
So,
In compound 3:
So,
The ratios of the mass of chromium from three compounds are taken.
As the ratios are whole numbers, the given data confirms the law of multiple proportions.
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Chapter 1 Solutions
Chemistry: The Molecular Science
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