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a lab technician knows the empirical formula of a molecule is ch2. he uses a mass spectrometer to determine the molar mass of the compound. the test results show that the molar mass is 56.1 g/mol. what is its molecular formula?

Respuesta :

Answer:

C4H8

Explanation:

For the given compound, the empirical formula is CH2, and the molar mass is 56.1 g/mol. Let’s apply the steps:

The EFM of CH2 is 12.01+2×1.01=14.03 g/mol.

The ratio of the molar mass to the EFM is 14.0356.1​≈4

The molecular formula is obtained by multiplying the subscripts in CH2 by 4, which gives C4H8.

Therefore, the molecular formula of the compound is C4H8

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