Question

fill in the missing words. write subscripts as regular numbers in order to receive credit for correct answers. a) the formula of sodium hydroxide is. b) the formula of zinc sulfate is. c) the formula of silver carbonate is. d) the formula of aluminum oxide is. e) the formula of nickel(ii) chloride is.

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) $NiCl_2$