Near room temperature the density ofwater is 1 g/ml and the densityof ethanol is 0.789 g/ml . what volume of ethanol contains the same number ofmolecules as are present in 175 ml of h2o?

566.7 ml

Explanation:-

Density of the water=

volume of water = 175 ml

Putting in the values we get:

mass of water = 175 g

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number of particles.

tex]\text{Number of moles of water}=\frac{175g}{18g/mol}=9.72moles[/tex]

Thus 9.72 moles of ethanol are required.

Mass of ethanol=

Density of ethanol=

volume of ethanol= ?

Putting in the values we get:

Thus volume of ethanol that contains the same number of molecules as are present in 175 ml of water is 566.7 ml.