H2O2 solution used for hair bleaching as a solution of approximately 5.0g H2O2 per 100 ml of the solution. The molecular weight of H2O2 is 34. The molarity of this solution is approximately
molarity=no of moles of solute/vol of soln in litres
no of moles = given mass/molecular mass=5/34
sol in litres= 100 mL=0.1 L
=>molarity= (5/34)*10=1.5