How many atoms are in 3CH4?

To determine the number of atoms in 3CH4, we first need to break down the molecular formula. CH4 represents one methane molecule, which contains one carbon atom and four hydrogen atoms. Therefore, 3CH4 would consist of 3 methane molecules, resulting in 3 carbon atoms and 12 hydrogen atoms in total. Thus, there are a total of 15 atoms in 3CH4.