..I know how to calculate molecular weight for but this got me stuck; I've never seen one like this.
The molar mass of B2(SO4)3. 15 H2O
What got me confuse is the no. 15
This is what I have in my paper:
B 2 x 10.811 =
A 3 x 32.066 =
O 12 x 15.9994 =
* Do I combine S and O's answer, and then times by 15? What about H, do I leave it alone because it's coefficient is 2?