When 100.g Mg3N2 reacts with 75.0 g H2O, what is the maximum theoretical yield of NH3?

Mg3N2(s) + 6H2O (l) → 3Mg(OH)2(aq) + 2NH3(g)

Answer choices:
1280 g
70.8 g
213 g
23.6 g
25.0 g

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

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.

the ratio of the conjugate base to the acid required to attain the desired ph.