Question

cal. concentration of hno3 in mole / liter which has density of 1.41g/ml and mass% of hno3 in it be 69%

Answer 1

heyy dear nikita ur answer....

Mass percent of nitric acid in the sample = 69 % [Given]Thus, 100 g of nitric acid contains 69 g of nitric acid by mass.Molar mass of nitric acid (HNO3)= {1 + 14 + 3(16)} g mol–1= 1 + 14 + 48= 63 g mol–1∴ Number of moles in 69 g of HNO3
 =69/63=1.095Volume of 100g of nitric acid solution
 mass/density=100/1.41=70.92×10^-3Concentration of nitric acid
 =1.095/70.92×10^-3∴Concentration of nitric acid = 15.44 mol/L..........i hope it will help u..               ...@kundan

Answer 2

HEY!!

Mass percent of nitric acid in the sample = 69 % [Given]
Thus, 100 g of nitric acid contains 69 g of nitric acid by mass.
Molar mass of nitric acid (HNO3)
                                  = {1 + 14 + 3(16)} g mol–1
                                            ANS)Concentration of nitric acid = 15.44 mol/L.