A compound has a molar mass of 120 g/mol. If the empirical formula is CH₂, what is the molecular formula? ________.
Answer & Analysis
Analysis
Question Analysis
This question tests the student's ability to determine the molecular formula from the empirical formula and the given molar mass.
Key Concept Explanation
The molecular formula is a multiple of the empirical formula. The relationship between the molar mass of the molecular formula and the empirical formula is given by , where is a positive integer.
Step-by-step Solution
1. Calculate the molar mass of the empirical formula CH₂: .
2. Determine using the given molar mass of the molecular formula:
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