Concentrated solution of HCl(%38 by mass)has a density of 1.19g/mL. a)calculate the mass of water H20 which is necessary to obtain 200g of 5% new HCl solution from the first solution.
b)What is the molar concentration of HCl in this concentrated solution?

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

i would say b

explanation:

but i think i would need more information than that

it means there are 3 atoms of oxygen

hi my dude or dudette