19. Look at the following chemical equation.
NaBr + Cl2 → 2NaCl + Br2
Is this a balanced chemical equation?
A. Yes, because the mass of the reactants is equal to the mass of the products.
В.
No, because the mass of the reactants is less than the mass of the products.
C.
No, because the reactants contain fewer molecules than the products.
D
Yes, because the reactants contain the same number of chlorine (CI) atoms as the products.

В.  No, because the mass of the reactants is less than the mass of the products.

Explanation:

Chemical equation:

NaBr + Cl₂      →      2NaCl + Br₂

The given equation is not balanced because number of moles of sodium and bromine atoms are less on reactant side while more on the product side.

There are one mole of sodium and one mole of bromine atom on left side of equation while on right side there are 2 moles of bromine and 2 moles of sodium atom are present. The number of moles of chlorine atoms are balanced.

Balanced chemical equation:

2NaBr + Cl₂      →      2NaCl + Br₂

Now equation is balanced. Number of moles of sodium , chlorine and bromine atoms are equal on both side.

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