Help with Chemistry...

Are there any Chemistry gurus out there that can help me solve these problems?  Thank you in advance...

1)  Consider that there is 28.53 g NaCl in a solution that has a total volume of 1,830 mL with a density of 0.9094 g/mL.
A) What is the molarity of NaCl?
B)What is the mass/mass %?
C)What is the molality?

2)  A 7.00-mL sample of a sulfuric acid solution of unknown concentration is titrated with a 0.1601 M Sodium Hydroxide solution. A volume of 4.99 mL of the base was required to reach the endpoint. What is the concentration of the unknown acid solution? Write the neutralization reaction, balance it, name the products THEN Solve the problem above

3)  Solution A has a concentration of 0.10 M sugar and Solution B has a concentration of 0.20 M sugar. If the two solutions are separated by a semipermeable membrane, which of the following occurs during osmosis?
A. The molarity of A increases.
B. Sugar molecules move from B into A.
C. Solvent molecules move from B into A.
D. The molarity of B increases.
E. none of the above