Question

What numbers go in the blank _Na2Co3+_HCI > _NaCl+H2O+_CO2​

Answer 1

Answer: $Na_2CO_3+2HCl\rightarrow 2NaCl+H_2O+CO_2$

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical equation will be:

$1Na_2CO_3+2HCl\rightarrow 2NaCl+H_2O+1CO_2$

Thus the numbers that go in the blanks are 1, 2, 2, and 1 respectively for $Na_2CO_3$, $HCl$ , $NaCl$ and $CO_2$ respectively.