Question

Correct the formula to match the name of the following compounds:

1. Iron(III) oxide,;$\mathit{F}{\mathit{e}}_{\mathbf{3}}{\mathit{O}}_{\mathbf{4}}$
2. Chloric acid,;$\mathit{H}\mathit{C}\mathit{l}$
3. Mercuric oxide,;$\mathit{H}{\mathit{g}}_{\mathbf{2}}\mathit{O}$
4. Dichlorineheptaoxide,;$\mathit{C}{\mathit{l}}_{\mathbf{2}}{\mathit{O}}_{\mathbf{6}}$

Short answer

(a) The corrected formulaof Iron(III) oxide is .$F{e}_2{O}_3$

(b) The corrected formula of Chloric acid is.$HCl{O}_3$

(c) The corrected formula of Mercuric oxide is.$HgO$

(d) The corrected formula of Dichlorine heptaoxideis.$C{l}_2{O}_7$

Step-by-step solution

To Correct the formula to match the name of Iron(III) Oxide,Fe3O4

The Molecule is an ionic compound so the number of atoms depends on the charge of each ion.

The charge of iron is +3 and the charge of oxygen is -2.The charges will just interchange as subscripts.

$F{e}^{3+}{O}^{2-}\to F{e}_2{O}_3$

$\mathit{F}{\mathit{e}}_{\mathbf{2}}{\mathit{O}}_{\mathbf{3}}$would be the correct formula for Iron(III) oxide.

To Correct the formula tomatch the name of Chloric acid,HCl

The chloric comes from the Polyatomic ion chlorate with the formula $Cl{O}_3^{-}$.

To make it into acid, we must add a hydrogen as much as the magnitude of its charge. Since$Cl{O}_3^{-}$ has a charge 1, we need to add one hydrogen atom.

Therefore, The formula of chloric acid is$HCl{O}_3$ .

$HCl{O}_3$would be the correct formula for Chloric acid.

To Correct the formula to match the name of Mercuric oxideHg2O,

The Mercuric has a charge of +2, and we know that oxide has a charge of -2.

The charges will just interchange as sunscripts. The subscript should also be reduce to the smallest whole numbers that retain the ratio of the atoms.

$\mathit{H}{\mathit{g}}^{\mathbf{2}\mathbf{+}}{\mathit{O}}^{\mathbf{2}\mathbf{-}}\mathbf{\to }\mathit{H}\mathit{g}\mathit{O}$

$HgO$would be the Correct Formula for mercuric oxide.

To Correct the formula tomatch the name ofDichlorineheptaoxideCl2O6,

The Molecule above is covalent.Therefore, the number of atoms in the compound is based on its prefixes.The prefix di means two, so there are 2 chlorine and prefix hepta means seven, so there should be seven oxygen atoms.

Therefore, The Formula of dichlorine heptaoxide is $C{l}_2{O}_7$.

$C{l}_2{O}_7$would be the Correct Formula for Dichlorine heptaoxide