The molecular weight of ethanol (C₂H₅OH), rounded to one decimal place, is ________ amu. A)45.1 B)26.0 C)25.0 D)46.1 E)29.0

Question

Quizplus · Accepted Answer

To calculate the molecular weight of ethanol, we need to add up the atomic weights of all its constituent atoms. The atomic weights are obtained from the periodic table.
C = 12.0
H = 1.0
O = 16.0
Adding up the atomic weights gives us:
2(12.0) + 6(1.0) + 1(16.0) = 46.0 amu
Rounding to one decimal place, we get 46.1 amu, which is option D.

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The Molecular Weight of Ethanol (C₂H₅OH), Rounded to One Decimal