How do you calculate the formula mass of aluminum carbonate?

1 Answer
anor277
Sep 17, 2016

Of "aluminum carbonate", the formula mass is the sum of the individual atomic masses; approx. 234.08*g*mol^-1.

Explanation:

The formula mass of Al_2(CO_3)_3 = {2xx26.98("Al")+3xx12.011("C")+9xx15.999("O")}*g*mol^-1} = ??

From where did I get the individual atomic masses? Did I know them off the top of my head? From where will you get them if you are asked this question in an exam?

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