1. Show that following equations are in accordance with the law of conservation of mass:
( $Fe = 56$ ; $S = 32$ )
$Fe + S \to FeS$

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Solution

Law of conservation of mass:
During 1789 Antoine Laurent Lavoisier discovered the law of conservation of mass.
According to him during a chemical reaction in an isolated system mass can neither be created nor be destroyed it remains conserved.
Mass at reactants side $=$ Mass at product side
Given ( $Fe = 56$ ; $S = 32$ )
$Fe (s) + S (s) \to FeS (s)$
Iron Sulphur Iron(II) sulphide
$56 g$ of Iron $+$ $32 g$ of sulphur $=$ $88 g$ of Iron(II)sulphide here, (mass of $FeS$ $=$ mass of $Fe$ $+$ mass of $S$ )
$88 g$ at reactant side $=$ $88 g$ at the product side
This equation shows law of conservation of mass.

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1. Show that following equations are in accordance with the law of conservation of mass:(Fe=56; S=32)Fe+S→FeS

1. Show that following equations are in accordance with the law of conservation of mass:
( $Fe = 56$ ; $S = 32$ )
$Fe + S \to FeS$