Chemistry

Question Analysis
This question involves calculating an empirical formula from the mass of each element in a sample. The main focus is on finding the mass of the unknown element (oxygen) first, then converting all masses to mole ratios.

Key Concept Explanation
When the mass of one element is not given, calculate it by subtracting the sum of the known masses from the total sample mass. Then follow the standard empirical formula steps: mass → moles → mole ratio → whole numbers.

Step-by-Step Solution
1. Calculate mass of oxygen:
2. Calculate moles of each element:
C:
H:

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