berapakah molaritas larutan yang dibuat dengan melarutkan 40 gram NaOH dalm 250 mL larutan ? (Ar1 Na=23 , O=16, H=1)

n = massa NaOH/ Mr NaOH
= 40/ 40
= 1 mol
n = 1 mol
M = n/v
M = 1 / 250 ml
M = 1/ 0,25 M
M = 4 M

Massa NaOH = 40 gram
V = 250 mL = 0,25 L
Mr NaOH
= Ar Na + Ar O + Ar H
= 23 + 16 + 1
= 40

n NaOH
= massa / Mr
= 40 / 40
= 1 mol

M = n/V
M = 1 / 0,25
M = 4 M