A mixture of magnesium carbonate and magnesium oxide of mass #12.46*g# underwent fierce heating. After heating, there were #8.43*g# of salt remaining. What were the masses of magnesium carbonate, and magnesium oxide in the original sample?
Well, we use the general decomposition
And we would have to heat the magnesium salt VERY fiercely to get complete decarboxylation.
And therefore in the original mixture there were
The balance of the salt must have