Answer
a) $NaHCO_{3}$
b) $KNO_{3}$
c) $(NH_{4})_{2}SO_{4}$
d) $Mg_{3}(PO_{4})_{2}$
e) $Ca(HSO_{4})_{2}$
f) $Ba(OH)_{2}$
Work Step by Step
a) valency of Na = 1 and $HCO_{3}$ is 1. hence the formula is $NaHCO_{3}$
b) valency of K = 1 and $NO_{3}$ is 1. hence the formula is $KNO_{3}$
c) valency of $NH_{4}$ = 1 and $SO_{4}$ is 2. hence the formula is $(NH_{4})_{2}SO_{4}$
d) valency of Mg = 2 and $(PO_{4})$ is 3. hence the formula is $Mg_{3}(PO_{4})_{2}$
e) valency of Ca = 2 and $HSO_{4}$ is 1. hence the formula is $Ca(HSO_{4})_{2}$
f) valency of Ba = 2 and $OH$ is 1. hence the formula is $Ba(OH)_{2}$
