can someone help me with these, i am very confused ):

Solution Calculations Calculate the molarity of the following solutions: 12.4 g NaOH dissolved in 250 mL water 2.9 L water containing 170 g silver nitrate How many grams of solute indicated should be dissolved in 500 mL solvent to arrive at the final concentration: 0.00650 M CH3OH How much of a 4.0 M NaOH stock solution should be diluted to 200.0 mL to produce a 0.080 M NaOH solution? What is the percent composition (%v/v) of a solution made by mixing 15 ml ethanol with 35 ml H2O? What is the percent composition (% w/w) of a solution made by dissolving 15 g ferric sulfate in 200 ml H,0? (assume density of water - 1.032 g/ml) What is the percent composition (% w/v) of the solution created by dissolving 2 packets of sugar (5.0 grams each) into a 24 ounce glass of ice tea (density - 1.104 g/ml)? Calculate the molality (m) of the sweet tea solution in the question above given that table sugar is sucrose, C12H2011