$0.84 \, g$ of a metal hydride contains $0.04 \, g$ of hydrogen. What is the equivalent mass of the metal?

The unit of atomic mass,$amu$ is replaced by $u$,here $u$ stands for

An element $X$ reacts with oxygen to form a compound $X_2O_3$. If the atomic mass of $X$ is $91.5$,the equivalent mass of $X$ is:

When a metal oxide is heated in a stream of hydrogen,reduction occurs. After reduction,$3.15 \, g$ of the oxide yields $1.05 \, g$ of the metal. What can we conclude about the metal?

An element of mass $A_1 \, g$ gives a chloride of mass $A_2 \, g$. Calculate its equivalent mass.

Oxygen consists of $O^{16}, O^{17}$ and $O^{18}$ isotopes and carbon consists of isotopes of $C^{12}$ and $C^{13}$. Total number of $CO_2$ molecules possible are