Chemistry II

A solution of ethanol in water is prepared by dissolving 61.0 mL of ethanol (density = 0.79g/mL) in enough water to make 280.0 mL of solution. What is the molarity of the ethanol in this solution?

definition of molarity = #mols/L.
mass ethanol = m = volume x density = 61.0 mL x 0.79 g/mL =?? grams.
mols ethanol = ??g/molar mass ethanol.
Liters = 0.280.

61.0 mL x 0.79 g/mL = 48.19 g
48.19 g / 46.0 molar mass = 1.05 mol
1.05 mol / .280 L = 3.74 M

  1. 👍 0
  2. 👎 0
  3. 👁 236
asked by Jayd

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry #11

    A solution of ethanol (C2H5OH) is prepared by dissolving 35.0 ml of ethanol in enough water to make 120.0 ml of solution. What is the molarity of the ethanol in this solution? 46.07 g= molar mass of ethanol .079 g/ml=density

    asked by Chelsea on October 14, 2013
  2. CHEMISTRY

    An ethanol-water solution is prepared by dissolving 10.00 ml ethanol C2H5OH (density=0.789g/ml) in sufficient water to produce 100.00 ml of solution with a density of 0.982g/ml. What is the concentration of ethanol in this

    asked by ADRIAN on November 13, 2013
  3. Chemistry

    A solution of ethanol (C2H5OH) in water is prepared by dissolving 61.9 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?

    asked by Andrea on October 27, 2010
  4. chem

    A solution of ethanol (C2H5OH) in water is prepared by dissolving 57.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 240.0 mL of solution. What is the molarity of the ethanol in this solution?

    asked by mel on November 3, 2007
  5. Chemistry

    A solution of ethanol (C2H5OH) in water is prepared by dissolving 76.9 mL of ethanol (density 0.79 g/cm^3) in enough water to make .250 L of solution. What is the molarity of ethanol in this solution?

    asked by Anonymous on May 6, 2010
  6. chemistry

    A solution of ethanol (C2H50H) in water is prepared by dissolving 76.9ml of ethanol (density0.79g/cm3) in enough water to make 0.25L of solution. What is the molarity of ethanol in this solution Who helps me

    asked by Fai on September 29, 2012
  7. chemistry

    A solution of ethanol, C2H5OH, is prepared by dissolving 25.0 mL of ethanol in enough water to give a total volume of 250.0 mL. What is the percent-by-volume concentration of ethanol?

    asked by Adrian on May 10, 2013
  8. science

    A solution of ethanol water is prepared by dissolving 10ml ofethanol density 0.789g/mol in a 100ml of a solution with density 0.982g/mol.what is the cerntration of ethanol in the solution expressed in mass percent?;mass/volume

    asked by celestine on January 5, 2018
  9. chemistry

    What is the mass/vol % ethanol in an ethanol-water solution with density of 0.875 g/ml and containing 65.0% ethanol by volume? The density of pure ethanol is 0.789 g/ml.

    asked by jimbo on June 27, 2010
  10. chemisty problem help

    Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 70 pm. Calculate the volume of the nucleus and the volume of the atom. What percentage of the carbon atom's volume is occupied by the nucleus?

    asked by Tagen on February 8, 2007

More Similar Questions