
Interpretation:
Whether the compound
Concept introduction:
The mass percentage is defined as the percentage of component present in it. The mass percentage of the element is the mass of element divided by the total mass of the compound and multiplied by 100.

Answer to Problem 28SSC
For sample
For sample
So, the compound or sample is not same.
Explanation of Solution
Given information:
The table:
Analysis Data of Two Iron Compounds | |||||
compound | Total mass (g) | Mass Fe (g) | Mass O (g) | Mass percentage Fe | Mass percentage O |
It is known that the mass of compound
The mass value of Fe for sample I is
The percentage by mass for sample
Percentage by mass of element,
Percentage by mass of element,
Themass percentage of Fe and O is calculated for sample
It is known that the mass of compound
From the given table −
Percentage by mass of element,
Percentage by mass of element,
Thus, the required table is:
Analysis Data of Two Iron Compounds | |||||
compound | Total mass (g) | Mass Fe (g) | Mass O (g) | Mass percentage Fe | Mass percentage O |
Now for the law of multiple proportion -
Sample
Sample
The relative mass ratio of Fe in the sample
Hence, the compound or sample is not same.
The calculated percentage by mass for sample
Chapter 3 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
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