Answer:
Option d) 0.25
Explanation:
Molar Mass of NaOH = 23 + 16 + 1 = 40g/mol
Mass of NaOH from the question = 80g
Number of mole = Mass/Molar Mass
Number of mole of NaOH = 80/40 = 2moles
Volume = 8L
Active mass = mole /Volume
Active mass = 2moles/8L
Active mass = 0.25mol/L
