K2o
Anhydride means to remove a water molecule H2O from the original compound. KOH has only 1 oxygen and 1 hydrogen atom. Therefore, 2 KOH formula units are required to complete the removal--> 2KOH has to subtract 2 H and 1 O from its formula and will finally give K2O hence, the anhydride of KOH is K2O
ko
Basic. Remember metal oxides of which magnesium oxide is one, are basic oxides.
basic
RaCO3 is a salt
K+ and OH- is KOH -----------
C4H4O3
C4H2O3
Formula: KOH
KOH
This is the parent acid of the anhydride CO2 --> finding the anhydride of a parent acid can be found by subtracting an H2O molecule from it (and vice versa to determine the parent acid of an anhydride)