Easy five Chem1 questions (due in 2 hours)

DUE in 2 hours quick!! Please provide solutions and answers!!

1. What is the molar concentration of NaOH when 23.7786 g is dissolved in enough water to fill a 500.00 mL volumetric flask? (MW NaOH = 39.997 g/mol)

2. What is the molality of a solution prepared by dissolving 12.011 g of sucrose in 250.0 mL of water at 24^oC? (Hint: Use Table 2-7.  MW_sucrose = 342.30 g/mol)).

3. A solution is prepared that is 23.44 wt% NaCl in water. What is the molality of the solution? (MW_NaCl = 58.443 g/mol)

4. How many grams of PbCl₂ will be produced if excess HCl is added to 30.00 mL of a 0.2319M solution of PbNO₃ according to the following reaction.  (Assume that the reaction proceeds to completion.  MW_PbCl2 = 278.1164 g/mol.)