What coefficients is needed for $N a H {C O}_{3}$ to balance the following equation?
$N a H {C O}_{3} \to {N a}_{2} {C O}_{3} + H_{2} O + {C O}_{2}$

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Solution

The correct option is D $2$
$N a H C O_{3} \to N a_{2} C O_{3} + H_{2} O + C O_{2}$
In products there are $2 m o l e s$ of sodium. So add $2 m o l e s$ of $N a H C O_{3}$
$\Rightarrow 2 N a H C O_{3} \to N a_{2} C O_{3} + H_{2} O + C O_{2}$
So, the coefficient of $N a H C O_{3} = 2$

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