Medium
Complete the missing components/variables given as $x$ and $y$ in the following reactions:
$(a)$ $Zn(s) + H_2SO_4(aq) \longrightarrow ZnSO_4(x) + H_2(y)$
$(b)$ $CaCO_3(s) \xrightarrow{x} CaO(s) + CO_2(g)$
$(a)$ $Zn(s) + H_2SO_4(aq) \longrightarrow ZnSO_4(x) + H_2(y)$
$(b)$ $CaCO_3(s) \xrightarrow{x} CaO(s) + CO_2(g)$
(A) In the reaction between zinc and sulfuric acid, $ZnSO_4$ is formed as an aqueous solution, so $x = (aq)$. Hydrogen gas is released as a product, so $y = (g)$.
$(b)$ The decomposition of calcium carbonate into calcium oxide and carbon dioxide requires the application of heat, so $x = \text{Heat}$.
$(b)$ The decomposition of calcium carbonate into calcium oxide and carbon dioxide requires the application of heat, so $x = \text{Heat}$.
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