Question

C2h6o how many moles of ethanol are present in a 10.0 g sample of ethanol

Answer 1

Explanation:

It is known that number of moles is equal to mass divided by molar mass of the compound or substance.

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

Since, it is given that mass is 10 g and molar mass of ethanol is 46.07 g/mol.

Hence, calculate the number of moles of ethanol as follows.

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

                                = $\frac{10 g}{46.07}$

                                = 0.217 mol

Thus, we can conclude that there are 0.217 moles of ethanol are present in a 10.0 g sample of ethanol.

Answer 2

46 gram of ethanol ≡ 1 mole of ethanol
1 gram of ethanol ≡ 1/46 mole of ethanol
10 gram of ethanol ≡ 1*10/46 mole of ethanol
                               =0.217 mole of ethanol