Chemistry - Mole Concept Question with Solution | TestHub

Atoms can neither be created nor destroyed. This is the statement of law of conservation of mass. Under similar conditions of temperature and pressure, equal volume of gases contain equal number of atoms. As, $PV=nRT$ (Ideal gas equation) If, for Ist case, for IInd case, $$\begin{array}{rl}& P_1{V}_1=n_{1}R{T}_1\\ & P_2{V}_2=n_{2}R{T}_2\end{array}$$ $$\Rightarrow \frac{P_1{V}_1}{P_2{V}_2}=\frac{n_{1}R{T}_1}{n_{2}R{T}_2}\Rightarrow n_1=n_2\left(\because P_1,=P_2,V_1=V_2,T_1=T_2\right)$$