Please help!! Which compounds contain both ionic and covalent bonds?

I. NH4NO3 II. KAl(SO4)2 III. CH3COOH

BS answers get reported!

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.