Hợp chất X có công thức cấu tạo :CH3 cù COOCH3.Tên gọi X là

your answers are a,b,,e and f

i hope this

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.

where are the choice options?

the maximum mass of nh3 is nh3 in grams