Question

What is the atomic mass of a trivalent atom X if its equivalent mass is y?

Answer 1

Equivalent mass

The equivalent mass of an element is defined as the number of parts by mass, of that element which can displace or combine with 1.008 parts by mass of Hydrogen or 8 parts by mass of oxygen or 35.5 parts by mass of Chlorine.

$$\begin{gathered} ·\mathbf{}\mathbf{\text{Atomic mass=Equivalent mass X valency}} \\ \text{· X is the trivalent atom} \\ \text{· Therefore valency of the atom =3} \\ \text{· Equivalent mass=Y} \\ \text{· Therefore Atomic mass of X =Y×3} \\ \text{X=3Y} \end{gathered}$$