fill in the missing words. write subscripts as regular numbers in order to receive credit for correct…

Explanation:

Step1: Determine ions for sodium hydroxide

Sodium ion is $Na^+$ and hydroxide ion is $OH^-$. They combine in a 1:1 ratio.

Step2: Write formula for sodium hydroxide

The formula is $NaOH$.

Step3: Determine ions for zinc sulfate

Zinc ion is $Zn^{2 +}$ and sulfate ion is $SO_4^{2 -}$. They combine in a 1:1 ratio.

Step4: Write formula for zinc sulfate

The formula is $ZnSO_4$.

Step5: Determine ions for silver carbonate

Silver ion is $Ag^+$ and carbonate ion is $CO_3^{2 -}$. Two silver ions are needed to balance the charge.

Step6: Write formula for silver carbonate

The formula is $Ag_2CO_3$.

Step7: Determine ions for aluminum oxide

Aluminum ion is $Al^{3+}$ and oxide ion is $O^{2 -}$. To balance the charges, we need 2 aluminum and 3 oxygen atoms.

Step8: Write formula for aluminum oxide

The formula is $Al_2O_3$.

Step9: Determine ions for nickel(II) chloride

Nickel(II) ion is $Ni^{2+}$ and chloride ion is $Cl^-$. Two chloride ions are needed to balance the charge.

Step10: Write formula for nickel(II) chloride

The formula is $NiCl_2$.

Answer:

a) $NaOH$ b) $ZnSO_4$ c) $Ag_2CO_3$ d) $Al_2O_3$ e) $NiCl_2$