Question

Calculate final molarity of solution 10.4gram sal ammoniac the n 40ml water having density 1.0726

Answer 1

Explanation:

use the formula

*m= no. of moles of solute(n) / vol of solutn(L)*

here vol of soln is 40ml. convert into Litre by 40/1000.

for n ie no of moles use *n=given mass(m) / molar massl(w)*

m is 10.4, w is 17(NH3=(N=14 +H=3)

OKAY i seriously dont know the role of given density coz acc to density formula(d=mass/vol), mass, vol and density are given so whats the use of density over here?