Question

1. oxygen reacts with iron to produce rust and with hydrogen to produce water. which statement describes both reactions? new molecules are formed but the same elements are found. both a change of state and of elements is involved. a different solution is formed in each case. a different mixture is formed in each case.

Explanation:

In both the reaction of oxygen with iron to form rust and with hydrogen to form water, chemical reactions occur. Chemical reactions involve the formation of new molecules. In the rust - formation reaction, iron oxide is formed from iron and oxygen, and in the water - formation reaction, water molecules are formed from hydrogen and oxygen. The same elements are not present in the reactants and products in their original form, new substances are created.

Answer:

A. New molecules are formed but the same elements are found