Question

What is the molar mass of `Al(NO_3)_3`?

Answer 1

Surely you can use the interwebz….?

Explanation:

I gets `"formula mass of aluminum nitrate"-=213*g*mol^-1`.

But how did I get that mass? I looked at the Periodic Table in front of me, which tells me that molar masses of `Al`, `N`, and `O` are `27.0*g*mol^-1`, `14.01*g*mol^-1`, `16.0*g*mol^-1` respectively...and I added these together appropriately...

`{27.0+3xx14.01+9xx16}*g*mol^-1-=??*g*mol^-1`

Answer 2

Molar mass: 213.01

Explanation:

Molar mass of a compound can be found by finding a periodic table and looking at the atomic mass of each element that is in the compound

Aluminium - 26.98
Nitrogen - 14.01
Oxygen - 16

`Al(NO_3)_3 = 26.98+3times(14.01+16times3) = 213.01`