Respuesta :

Willchemistry
hey there:

Molar mass NaOH = 39.997 g/mol

Number of moles:

n = m / mm

n = 15.5 / 39.997

n = 0.387 moles

Volume in liters:

250.0 mL / 1000 => 0.25 L

Therefore:

M = n / V

M = 0.387 / 0.25

= 1.55 M

Answer D

hope this helps!

Answer:

A.  6.2 M

B.  0.00155 M

C. 0.062 M

D.  1.55 M

E.  62 M