Question: how many hydrogen atoms are in five molecules of isopropyl alcohol?
Answer: Explanation: First, the correct chemical formula of isopropyl alcohol is C3H7OH and not C3H7O . That being said, C3H7OH represents one molecule of isopropyl alcohol, which has 8 Hydrogen atoms. So, the number of Hydrogen atoms in 5 molecules of C3H7OH will be 8×5=40 .