6. A solution is made using 200.0 mL of methanol (density 0.792 g/mL) and 301.1 mL of water (density 1.000 g/mL). What is the mass percent of the methanol?

7. A solution is made using 80.1 g of toluene (MM = 92.13 g/mol) and 80.0 g of benzene (MM = 78.11 g/mol). What is the mole fraction of the toluene in the solution?

8 .The percent by mass of methanol (MM = 32.04 g/mol) in an aqueous solution is 22.3%. What is the molality of the methanol solution?

9. How many moles of precipitate will be formed when 50.0 mL of 0.300 M AgNO₃ is reacted with excess CaI₂ in the following chemical reaction?
2 AgNO₃ (aq) + CaI₂ (aq) → 2 AgI (s) + Ca(NO₃)₂ (aq)

10. Complete the balanced dissociation equation for the compound below. If the compound does not dissociate, write NR after the reaction arrow.
K2Cr2O7(s)->