Asolution of ethanol (c2h5oh) in water is prepared by dissolving 75.0 ml of ethanol (density 0.79 g/cm3 ) in enough water to make 250.0 ml of solution. what is the molarity of the ethanol in this solution?

Given the density of ethanol = 0.79

Volume of ethanol = 75.0 mL

Calculating the mass if ethanol from density and volume:

Molar mass of ethanol = (2*atomic weight of C)+(6*atomic weight of H)+(1*atomic weight of O)

                                     =(2*12g.mol) + (6*1g/mol) + (1*16g/mol)

                                     =46g/mol

Moles of ethanol =

Volume of the solution = 250.0 mL

Converting the volume from mL ot L:

Molarity of ethanol in the solution =

the answer to your question is c