Question

2. Find out the formula of the following compounds.
(A) Water (B) Salt (C) Sugar (D) Carbon dioxide (E) Carbon monoxide (F) Vinegar
(G) Washing soda (H) Baking soda (I) Hydrochloric acid (J) Magnesium chloride

Answer 1

Explanation:

The formula for each of the given compounds are as follow.

(A) Water is made up of two hydrogen atoms and one oxygen atom. Therefore, its formula is $H_{2}O$.

(B) Salt is also known as sodium chloride which consists of one molecule of sodium and one molecule of chlorine. Therefore, its formula is NaCl.

(C) Sugar is made up of carbon, hydrogen and oxygen. It has 12 carbon atoms, 22 hydrogen atoms and 11 oxygen atoms. Therefore, its formula is $C_{12}H_{22}O_{11}$.

(D) Carbon dioxide is made up of one carbon atom and two oxygen atoms. Therefore, its formula is $CO_{2}$.

(E) Carbon monoxide is made up of one carbon atom and one oxygen atom. Therefore, its formula is CO.

(F) Vinegar has one carboxylic group and one $CH_{3}$. Therefore, its formula is $CH_{3}COOH$.

(G) Washing soda has 2 sodium atoms and one carbonate atom a chemical. Therefore, its formula is $Na_{2}CO_{3}$.

(H) Baking soda has one sodium atom, one hydrogen atom and one carbonate atom. Therefore, its formula is $NaHCO_{3}$.

(I) Hydrochloric acid has one hydrogen atom and one chlorine atom. Therefore, its formula is HCl.

(J) Magnesium chloride has one atom of magnesium and 2 atoms of chlorine. Therefore, its formula is $MgCl_{2}$.

Answer 2

A compound is a mixture of two or more elements which are present in an exact ratio. The chemical formula defines the number of atoms present in a compound.  

             $(A) \quad Water\quad -\quad { H }_{ 2 }O\\(B)\quad Salt\quad -\quad NaCl$

             $(C)\quad Sugar\quad -\quad { C }_{ 12 }{ H }_{ 22 }{ O }_{ 11 }\\(D)\quad Carbon\quad dioxide\quad -\quad { CO }_{ 2 }$

             $(E)\quad Carbon\quad monoxide\quad -\quad CO\\(F)\quad Vinegar\quad -\quad { CH }_{ 3 }COOH$

             $(G)\quad Washing\quad soda\quad -\quad { Na }_{ 2 }{ CO }_{ 3 }\\(H)\quad Baking\quad soda\quad -\quad NaH{ CO }_{ 3 }$

             $(I)\quad Hydrochloric\quad acid\quad -\quad HCl\\(J)\quad Magnesium\quad chloride\quad -\quad MgC{ l }_{ 2 }$