Oxygen

Explanation

To estimate the percentage of oxygen in an organic compound, we can follow these steps:

### Step-by-Step Solution:

1. **Calculate the Percentages of Other Elements**:
- First, determine the percentages of carbon (C), hydrogen (H), and nitrogen (N) in the organic compound. This can be done through combustion analysis or other analytical techniques.

2. **Subtract from 100%**:
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