
Concept explainers
Interpretation:
Between the given molecules, the molecule having more number of moles should be determined.
1.0 g methanol and 1.0 g ethanol
Concept Introduction:
Mole is SI unit which is used to measure the quantity of the substance. It is the quantity of a substance which contains same
Number of moles is defined as the ratio of mass to the molar mass.
The ratio of mass of the given compound to the number of moles of compound is known as molar mass.
The one mole of any substance is equal to the

Answer to Problem 4E
Number of moles of 1.0 g of methanol is greater than the number of moles of 1.0 of ethanol.
Explanation of Solution
The given two molecules are: 1.0 g methanol (
First step is to calculate the molar mass of each molecule.
Molar mass of methanol =
=
Molar mass of ethanol =
=
Now,
Number of moles of methanol is calculated as:
Put the values,
Number of moles of methanol =
Number of moles of methanol =
Number of moles of ethanol is calculated as:
Number of moles of ethanol =
Number of moles of ethanol =
Therefore, number of moles of 1.0 g of methanol is greater than number of moles of 1.0 of ethanol.
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