Respuesta :
Answer:
there are 0.087 moles of ethanol in a 4.00 G sample of ethanol
Explanation:
Number of moles present in a substance is equal to the mass divided by molar mass.
Mathematically, No. of moles = [tex]\frac{mass}{\text{molar mass}}[/tex]
As it is given that mass is 4.00 g and molar mass of [tex]CH_{3}CH_{2}OH[/tex] is 46.07 g/mol.
Hence, calculate the number of moles of [tex]CH_{3}CH_{2}OH[/tex] as follows.
No. of moles = [tex]\frac{mass}{\text{molar mass}}[/tex]
= [tex]\frac{4.0 g}{46.07 g/mol}[/tex]
= 0.086 mol
Thus, we can conclude that number of moles of [tex]CH_{3}CH_{2}OH[/tex] present in 4.00 g is 0.086 mol.
