First, determine the number of moles of NaOH by multiplying the volume given with the molarity.
n = (200 mL)(1 L/1000 mL)(0.150 mole/L)
n = 0.03 moles
Then, multiply the calculated number of moles above with the given molar weight.
m = (0.03 moles)(40 g/mol)
m = 1.2 g
Answer: 1.2 grams of NaOH
