Its density is 11012 g cm-3 at 20c calculate its molality

Question

A solution of copper(II) sulfate (CuSO₄) in water is 9.500 % copper(II) sulfate by mass. Its density is 1.1012 g cm^-3 at 20°C. Calculate its molality and mole fraction at this temperature.

In the laboratory you are asked to make a 0.731 m magnesium bromide solution using 375 grams of water.  

How many grams of magnesium bromide should you add?

An aqueous solution with a pH of 1.91 is diluted from 1.21 L to 3.63 L. What is the pH of the diluted solution?

Arrange the following compounds in terms of INCREASING acidity.

CHCl₂CO₂H

CH₃CH₂OH

CHF₂CO₂H

In a laboratory experiment, students synthesized a new compound and found that when 11.35 grams of the compound were dissolved to make 191.3 mL of a water solution, the osmotic pressure generated was 8.06 atm at 298 K. The compound was also found to be nonvolatile and a non-electrolyte.  

What is the molecular weight they determined for this compound?