Question

conservation of matter states that the reactants have to equal the ______
a products
b enablers
products and reactants in a balanced chemical reaction have the same number of ______ of each element.
a atoms
b molecules
if the equation on the board had shown 3 atoms of carbon on the reactants side, how many atoms of carbon would need to be represented on the products side?
a 2
b 3

Explanation:

1. The law of conservation of matter states that in a chemical reaction, the mass of reactants equals the mass of products. So, reactants have to equal the products.
2. In a balanced chemical - reaction, products and reactants have the same number of atoms of each element. Molecules can be different in number but the atom count for each element is conserved.
3. According to the law of conservation of matter, if there are 3 atoms of carbon on the reactants side, there must be 3 atoms of carbon on the products side to maintain the balance.

Answer:

1. A. products
2. A. atoms
3. B. 3