Question

write a balanced chemical equation for magnesium carbonate decomposes to form magnesium oxide and carbon dioxide​

Answer 1

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$\bold{\small{\color{orange}{Using\:laws\:of\:conservation\:of\:mass}}}$

The laws of conservation of mass states that the total number of atoms of different elements in reactants are equal to the total number of atoms in different elements in products during the chemical reaction.

$\bold{\small{\color{green}{Balanced\:Chemical\:Equation:}}}$

$MgCO_3(s) --^{heat}--> MgO(s) + CO_2(g)$

It is a decomposition reaction.

$\bold{\small{\color{blue}{Now\:see\:how\:to\:balance:}}}$

a).Number of Magnesium atoms in left hand side is equal to the number of magnesium atoms in right hand side is 1.

b). Number of carbon atoms in left hand side is equal to the number of carbon atoms in right hand side is 1.

c). Number of oxygen atoms in left hand side is equal to the number of oxygen atoms in right hand side is 3.

Answer 2

MgCO³-------> MgO+CO² ...............