Question

Write the chemical formulae, elements present and state of matter of the following compounds:

Common salt, glucose, hydrochloric acid, Sulphur dioxide, sugar, and Nitrogen dioxide.

Answer 1

Chemical formula: A chemical formula tells us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many there are for each element in the form of subscripts.

Common salt:

• The chemical formula of Sodium chloride is $\mathrm{NaCl}$.
• The elements present in this compound are Sodium and Chlorine.
• The physical state of sodium chloride is solid at room temperature

Glucose:

• The chemical formula of Glucose is ${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6$
• The elements present in this compound are Carbon, Hydrogen and Oxygen.
• The physical state of glucose is solid at room temperature.

Hydrochloric acid:

• The chemical formula of Hydrochloric acid is $\mathrm{HCl}$.
• The elements present in this compound are Hydrogen and Chlorine.
• The physical state of Hydrochloric acid is liquid at room temperature.

Sulphur dioxide:

• The chemical formula of Sulphur dioxide is ${\mathrm{SO}}_2$.
• The elements present in this compound are Sulphur and Oxygen.
• The physical state of Sulphur dioxide is gas at room temperature.

Sugar:

• The chemical formula of Sugar is ${\mathrm{C}}_{12}{\mathrm{H}}_{22}{\mathrm{O}}_{11}$.
• The elements present in this compound are Carbon, Hydrogen and Oxygen.
• The physical state of Sugar is solid at room temperature.

Nitrogen dioxide:

• The chemical formula of Nitrogen dioxide is ${\mathrm{NO}}_2$.
• The elements present in this compound are Nitrogen and Oxygen
• The physical state of Nitrogen dioxide is gas at room temperature.