Molar mass of Al(OH)3 =

78.01 g/mol

Explanation:

To find the molar mass of Al(OH)₃, we have to look at the mass of each individual element on the periodic table.

Al - 26.98

O - 3(16.00) = 48.00

H - 3(1.01) = 3.03

Now add it all together.

26.98 + 48.00 + 3.03 = 78.01 or 78 g/mol

Hope that helps.

you need to give more information

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.