Question

How many Hydrogens are their in $4{\mathrm{H}}_2\mathrm{O}$ ?

Answer 1

Step 1: To find out the Coefficient of the $4{\mathrm{H}}_2\mathrm{O}$ molecule

The coefficient is $4$.

Step 2: To find out the total number of Hydrogen atoms in the given molecule

The number of Hydrogen atoms given $=$ $2$

Total number of Hydrogen atoms present $=$coefficient of the molecule $\times$ Total number of Hydrogen atoms in the molecule

$$\begin{gathered} =4\times 2 \\ =\mathbf{}\mathbf{8} \end{gathered}$$

Hence, the number of Hydrogen atoms present in $4{\mathrm{H}}_2\mathrm{O}$ is $\mathbf{8}\mathbf{}$.