Calculate the mass percent of a solution that is prepared

Question

Calculate the mass percent of a solution that is prepared by adding 53.9 g of NaOH to 426 g of H2O

Calculate the mass percent of a NaCl solution in which 189 g of NaCl is dissolved in 1.38 L of water at 25 °C (density = 0.997 g/mL).

Calculate the molar concentration for each of the following solutions.

1. 2.00 g KCl in 55.0 mL of solution
2. 2.00 g Na2CrO4 in 55.0 mL of solution
3. 20.0 gMgBr2 in 340.0 mL of solution
4. 20.0 g Li2CO3 in 340.0 mL of solution

What volume of each of the following solutions contains the indicated amount of dissolved solute?

1. 50.0 g solute in 0.375 M NaF
2. 50.0 g  solute in 0.375 M CdCl2
3. 50.0 g solute in 0.406 M K2CO3
4. 50.0 g solute in 0.406 M Fe(ClO3)3