Interpretation:
Whether in the given condition, two compounds are the same is to be determined.
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 23PP
No, cannot be sure that two compounds are the same.
Explanation of Solution
To calculate the percentage by mass of an element or compound, (compound consists of two or more than two element) mass of both elements is necessary.
When a single element has the same mass percentage, it does not guarantee (ensure) that the structure of each compound will also the same. So, with the given information, it cannot be sure that two compounds will be same.
No, nothing is sure about the given condition, two compounds are the same
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