How many grams of NaOH are needed to make 100 ml. of a 0.5 M solution of NaOH? (Atomic weight : Na=23, 0+16, H+1)

How many grams of NaOH are needed to make 100 ml. of a 0.5 M solution

1.	How many grams of NaOH are needed to make 100 ml. of a 0.5 M solution of NaOH? (Atomic weight : Na=23, 0+16, H+1)
A.	2
B.	20
C.	4
D.	1
Answer» B. 20