Answers by visitors named: Supreme

@Anonymous is right, the correct given answer is 0.773. Given by nSolve(440/(1 - x/343) = 442, x) / 2

Number of moles of NaOH=4/40=0.1 Molarity of solution= 500 cm3= 5 litres 0.1/5=0.02M Ans 0.02 M

I got 20 answers too.