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Which of the following is the relative molecular mass of a compound which has empirical ...

Which of the following is the relative molecular mass of a compound which has empirical formula CH\(_2\)O? (H = 1; C = 12; O = 16)
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  • A 42
  • B 45
  • C 126
  • D 180
  • E 145
Correct Answer: Option D
Explanation:
Empirical formula = CH\(_2\)O
= 12 + (2 x 1) + 16
= 30
Molecular formula = (CH\(_2\)O)\(_n\), where n is a whole number.
= 30n
\(\therefore\) From the options, only 180 is a multiple of 30. Hence, that is the only likely molecular mass with respect to CH\(_2\)O.

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