One molecule of bromine and two molecules of potassium chloride combine in a reaction. How many atoms are in the products?
a.six
b.two
c.three
d.four
The balanced chemical equation for this reaction is:
Br2 + 2 KCl -> 2 KBr + Cl2
Looking at the products, we have 2 molecules of KBr and 1 molecule of Cl2.
Each molecule of KBr contains 2 atoms of potassium (K) and 1 atom of bromine (Br), so in total, we have 2 x 2 = 4 atoms of potassium and 2 x 1 = 2 atoms of bromine in the KBr molecules.
The Cl2 molecule contains 2 atoms of chlorine (Cl).
Adding these together, we have:
4 atoms of potassium (K)
2 atoms of bromine (Br)
2 atoms of chlorine (Cl)
Therefore, there are a total of 4 + 2 + 2 = 8 atoms in the products.
So, the correct answer is d) four.