Write the formulas of the compounds formed by NH4+ with the following anions: CN−, HCO3−, SO42−, HPO42−

2 answers

NH4CN
(NH4)2SO4

Make the charges add to zero.
You see +1 charge for NH4 and -1 charge for CN.

You see +2 charge for NH4 and -2 charge for SO4.
lala