Question

1. Based only on your illustrated diagrams:
1a). deduce the chemical formula for each of the following chemical compounds:
(i). methane;
(ii). carbon dioxide;
(ii). sulphur dioxide;
(iv). ammonia;
(v). calcium chloride;
(vi). sodium oxide;
(vii). aluminium bromide;
(viii). potassium nitride;
(ix). magnesium carbide;

Answer 1

Explanation:

 

Login

chemical compound

Sections & Media

Load Previous Page

Classification of compounds

Chemical compounds may be classified according to several different criteria. One common method is based on the specific elements present. For example, oxides contain one or more oxygen atoms, hydrides contain one or more hydrogen atoms, and halides contain one or more halogen (Group 17) atoms. Organic compounds are characterized as those compounds with a backbone of carbon atoms, and all the remaining compounds are classified as inorganic. As the name suggests, organometallic compounds are organic compounds bonded to metal atoms.

Answer 2

The chemical formula for of the following chemical compounds are:

(i) Methane - $\[C{H_4}\]$

(ii) Carbon dioxide - $\[C{O_2}\]$

(ii) Sulphur dioxide - $\[S{O_2}\]$

(iv) Ammonia - $\[N{H_3}\]$

(v) Calcium chloride - $\[CaC{l_2}\]$

(vi) Sodium oxide - $\[CaO\]$

(vii) Aluminium bromide - $\[AlB{r_3}\]$

(viii) Potassium nitride - $\[{K_3}N\]$

(ix) Magnesium carbide - $\[Mg{C_2}\]$

Explanation:

• A chemical formula is the symbolic representation of the elements present in a compound.
• It gives the number of atoms of each element present in a compound.
• Thus, a chemical formula gives the chemical composition of a compound.
• The chemical formula of a binary compound is written by writing the symbols of the elements and exchanging the valencies of the elements and writing them as subscripts.
• Therefore, the chemical formulas of the given elements are:

        (i) Methane - $\[C{H_4}\]$

        (ii) Carbon dioxide - $\[C{O_2}\]$

        (ii) Sulphur dioxide - $\[S{O_2}\]$

        (iv) Ammonia - $\[N{H_3}\]$

        (v) Calcium chloride - $\[CaC{l_2}\]$

        (vi) Sodium oxide - $\[CaO\]$

        (vii) Aluminium bromide - $\[AlB{r_3}\]$

        (viii) Potassium nitride - $\[{K_3}N\]$

         (ix) Magnesium carbide - $\[Mg{C_2}\]$