How Many Moles of Na₂SO₄ Are in 250 ML of a 0.150

How many moles of Na₂SO₄ are in 250 mL of a 0.150 M Na₂SO₄ solution?

A) 0.0375
B) 0.600
C) 1.67
D) 6.00 x 10^-4
E) none of these