Question

which statement is true about a chemical reaction?
a the physical states of the atoms in the reactants determine the products.
b some of the atoms in the reactants will be a part of the products.
c the number of atoms in the reactants determines the products.
d all of the atoms in the reactants will be a part of the products.

Explanation:

According to the law of conservation of mass in chemical reactions, atoms are neither created nor destroyed. They are just rearranged. So all atoms in reactants must be part of products.

• Option A: Physical states don't determine products. Chemical properties do.
• Option B: It's not "some" but "all" atoms from reactants that are in products.
• Option C: Number of atoms doesn't determine products. Arrangement (chemical reaction) does.

Answer:

D. All of the atoms in the reactants will be a part of the products.