The chemist in charge of Mack Produtos Químicos received a batch of ammonium hydroxide in whose invoice stipulated the 25% ammonia content. In turn, the responsible chemist collected
in an Erlenmeyer flask, previously tared, a sample weighing 0.820g. Then he added water and
methyl red and titrated it with a solution of HCl, consuming 13.05mL of this acidic solution.
It is known that the HCl solution was standardized with pure sodium carbonate (P. A.), using 1.1498g
of salt against 30 ml of acid. What is the chemist's attitude towards the batch received? justify

the answer is d : ) have a good da

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

give me abc and i will get it for u.