3. In the chemical reaction CH,+ 20, - CO,+ 2H,0, there are reactants on the left of the equation and products on the right. If you count the atoms in the reactants, there are
a) 4 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms
b) 1 carbon atom, 4 hydrogen atoms, and 2 oxygen atoms
c) 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms
d) 4 carbon atoms, 4 hydrogen atoms, and 4 oxygen atoms