Show that following equations are in accordance with the law of conservation of mass:
( $H = 1; Cl = 35.5$ )
$H_{2} + {Cl}_{2} \to 2 HCl$

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Solution

Law of conservation of mass:
It was given Antoine Laurent Lavoisier in 1789.
According to him during a chemical reaction in an isolated system mass can neither be created nor be destroyed it remains conserved.
Mass of reactant $=$ Mass of product
$H_{2} (g) + {Cl}_{2} (g) \to 2 HCl (g)$
Hydrogen Chlorine Hydrogen chloride
mass of hydrogen $+$ mass of chlorine $=$ mass of hydrogen chloride
$2 g$ of $H_{2}$ $+$ $71 g$ of ${Cl}_{2}$ $=$ $2 x 36.5 g$ of $HCl$ (here, mass of $HCl$ ( $1 g$ of $H$ $+$ $35.5 g$ of $Cl$ )
$73 g$ of reactant $=$ $73 g$ of product
This equation shows the reaction is in accordance with the law of conservation of mass.

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Show that following equations are in accordance with the law of conservation of mass:(H=1;Cl=35.5)H2+Cl2→2HCl

Show that following equations are in accordance with the law of conservation of mass:
( $H = 1; Cl = 35.5$ )
$H_{2} + {Cl}_{2} \to 2 HCl$