At room temperature, the density of water is 1.0 g/mL and the density of ethanol is 0.789 g/mL. What volume of ethanol contains the same number of molecules as are present in 175 mL of water?

At room temperature, the density of water is 1.0 g/mL and the density

1.	At room temperature, the density of water is 1.0 g/mL and the density of ethanol is 0.789 g/mL. What volume of ethanol contains the same number of molecules as are present in 175 mL of water?
Answer» Solution :LET the volume of ethanol CONTAINING the same number of molecules as are present in 175 mL of `H_2O` be v mL. As given, Now, `("WT. of "C_(2)H_(5)OH)/("mol. Wt of" C_(2)H_(5)OH) = ("wt of" H_(2)O)/("mol. Wt of" H_(2)O)` or `(0.789 XX v)/46 = (1.0 xx 175)/18` `THEREFORE v= 566.82` mL