# How many grams are there in 4.50 moles of #Ba(NO_2)_2#?

##### 1 Answer

number of moles (n) = 4.50 moles

mass (m) =

molar mass (M) = ?

Your first step is to find out what is the molar mass (M) of

To find a molar mass of a compound, break the compound up into component parts so you could see what elements are involved.

If you break

You got to find the molar mass of each elements involved. You can identify the molar mass straight away if you look into the periodic table.

Ba =

N =

O = There are 2 O atoms inside the bracket and doubled because of the 2 outside the closing bracket, so there are 4 O atoms altogether.

So to get the molar mass of

n = 4.50 moles

m = ?

M = 229.3

Step 2, you can now find the mass of

Therefore, there are 1031.85 grams in 4.50 moles of