The molecular weight of ethanol (C₂H₅OH),rounded to one decimal place,is ________ amu.

Question

Quizplus · Accepted Answer

To calculate the molecular weight of ethanol, we need to add up the atomic weights of its constituent elements. The atomic weights of carbon, hydrogen, and oxygen are 12.01, 1.01, and 16.00, respectively. There are two carbon atoms, six hydrogen atoms, and one oxygen atom in ethanol. Therefore, the molecular weight of ethanol is:

2(12.01) + 6(1.01) + 16.00 + 1.01 + 15.99 = 46.07 amu

Rounding to one decimal place gives 46.1 amu, which is closest to choice D.

The Molecular Weight of Ethanol (C2H5OH),rounded to One Decimal Place,is

The Molecular Weight of Ethanol (C₂H₅OH),rounded to One Decimal Place,is