6. A solution is prepared by dissolving 45.6g of the solute MgCl2(MM=95.21g/mol) in enough water to make 255mL of solution. What is the molarity of the solute in this solution? a) 0.122M b) 8.19M c) 0.479M d) 1.88M 7. What mass of solute, in grams, is contained in 78.6mL of a solution of 1.45MMgCl(MM=95.21 g/mol) ? a) 10.9g b) 1.76103g c) 5.16g d) 0.114g 8. What is the molarity of a solution made by dissolving 0.911g of ascorbic acid (C6H5O6,MM=176 g/mole) in enough water to make 125mL of solution? a) 1.28M b) 0.0414M c) 7.29M d) 4.14105M 9. What is the percent-by-mass of MgCl2 in a solution formed by dissolving 3.40g of magnesium chloride in 18.0g of water? a) 15.9% b) 18.9% c) 81.1% d) 68.2% 10. How many grams of solute are contained in 356g of a 12.5% (w/w) solution? a) 4450g b) 28.5g c) 0.285g. d) 3.51g e) 44.5g 11. During osmosis a) pure solvent diffuses through a membrane but solutes do not b) pure solutes diffuse through a membrane but solvent does not c) pure solvent and a solution both diffuse at the same time through a membrane d) gases diffuse through a membrane into a solution and build up pressure 12. Red blood cells are placed into a solution and the cells expand and burst. Relative to the blood cells, the solution is a) hypertonic b) isotonic c) hypotonic d) isonormal