Question

4.0 gm of NaOH...........

Answer 1

36 % will be the answer

Answer 2

if u want to know molarity then ..____////


weight of NaOH = 4 gms

molar mass of NaOH = 40 gms

Since there is no mention of solute ‘s (NaOH's) density (which is required to find NaOH ‘s volume) and solute's quantity is very less also , that ‘s why , we consider that

volume of solution ~ volume of solvent (water) ~ 500 cm³ or 500 ml or 500/1000 litres or 0.5lit.

Put values in equation (2) , we get ,

Moles = 4/40 = 0.1 mole

Now , put values in equation (1) to get molarity of solution

Molarity = 0.1/0.5 = 0.2 molar