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Concentrated nitric acid used in the laboratory work is `68%` nitric acid by mass in aqueous solution. What should be the molaritiy of such a sample o

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Concentrated nitric acid used in the laboratory work is 68% nitric acid by mass in aqueous solution. What should be the molaritiy of such a sample of the acid if the density of solution is 1.504gmL-1 ? Select the correct answer from above options

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Correct Answer - 16.23M 68% by mass that 68g of HNO3 is present in 100g of solution. Volume of solution = Massofsolution Densityofsolution = 100g 1.50gmL-1 =66.5cm3=0.65L Molar mass, MwB of HNO3=1+14+48=63 Molarity= WA MwB×V = 68g 63gmol-1×0.0665 =16.23M

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