An oxide of nitrogen contains 30.45 mass % N and has a molar mass of 92.02 g/mol. What is the molecular formula?

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### Educational Content: Practice Question on Oxides of Nitrogen

**Topic:** Compounds and Molecular Formulas

**Question:**

An oxide of nitrogen contains 30.45 mass % N and has a molar mass of 92.02 g/mol. What is the molecular formula?

**Options:**

- NO₅
- N₃O₂
- N₄O₂
- NO₂
- N₂O₄ (Correct answer)

**Explanation:**

To determine the molecular formula, consider the given data:

1. **Percentage Composition:** 30.45% of the compound’s mass is nitrogen (N).
2. **Molar Mass:** The compound has a molar mass of 92.02 g/mol.

The correct formula, N₂O₄, satisfies these conditions when accounting for the atomic weights of nitrogen and oxygen:
- Nitrogen (N) has an atomic weight of approximately 14.01 g/mol.
- Oxygen (O) has an atomic weight of approximately 16.00 g/mol.

By applying these weights to the given options, N₂O₄ matches the specified conditions, confirming it as the correct answer.
Transcribed Image Text:### Educational Content: Practice Question on Oxides of Nitrogen **Topic:** Compounds and Molecular Formulas **Question:** An oxide of nitrogen contains 30.45 mass % N and has a molar mass of 92.02 g/mol. What is the molecular formula? **Options:** - NO₅ - N₃O₂ - N₄O₂ - NO₂ - N₂O₄ (Correct answer) **Explanation:** To determine the molecular formula, consider the given data: 1. **Percentage Composition:** 30.45% of the compound’s mass is nitrogen (N). 2. **Molar Mass:** The compound has a molar mass of 92.02 g/mol. The correct formula, N₂O₄, satisfies these conditions when accounting for the atomic weights of nitrogen and oxygen: - Nitrogen (N) has an atomic weight of approximately 14.01 g/mol. - Oxygen (O) has an atomic weight of approximately 16.00 g/mol. By applying these weights to the given options, N₂O₄ matches the specified conditions, confirming it as the correct answer.
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