Question:medium
The number of oxygen atoms present in chemical formula of fuming sulphuric acid is _______.
The number of oxygen atoms present in chemical formula of fuming sulphuric acid is _______.
Updated On: Feb 4, 2026
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Correct Answer: 7
Solution and Explanation
The chemical formula for fuming sulfuric acid, also known as oleum, is determined. Oleum is a mixture of sulfuric acid (H2SO4) and sulfur trioxide (SO3). A standard representation is H2S2O7, equivalent to H2SO4 + SO3.
The oxygen atom count is as follows:
- Oxygen atoms in H2SO4: 4
- Oxygen atoms in SO3: 3
Total oxygen atoms = 4 + 3 = 7.
The calculated value of 7 is within the specified range [7,7]. Therefore, fuming sulfuric acid contains 7 oxygen atoms.
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