Question

How many moles are there in 4.00 g of ethanol, CH 3CH 2OH?

Answer 1

there are 0.087 moles of ethanol in a 4.00 G sample of ethanol

Answer 2

Step-by-step explanation:

Number of moles present in a substance is equal to the mass divided by molar mass.

Mathematically, No. of moles =
`\frac{mass}{\text{molar mass}}`

As it is given that mass is 4.00 g and molar mass of
`CH_(3)CH_(2)OH` is 46.07 g/mol.

Hence, calculate the number of moles of
`CH_(3)CH_(2)OH` as follows.

No. of moles =
`\frac{mass}{\text{molar mass}}`

=
`(4.0 g)/(46.07 g/mol)`

= 0.086 mol

Thus, we can conclude that number of moles of
`CH_(3)CH_(2)OH` present in 4.00 g is 0.086 mol.