please help me with honors chem molarity question

Question

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO₃ (ℳ = 106.45 g/mol).

A. 419 g

B. 0.419 g    

C. 0.169 g

D. 0.00394 g

E. 169 g

Answer 1

1.575 L x 0.00250 mols / L x 106.45 g / mol = 0.419 g (ANSWER B)