Challenge Problem 1: In the combination reaction of H₂ and O₂ to produce water, if you have 3 moles of hydrogen and 4 moles of oxygen, what mass of water is created? Is there anything left over? _ H₂ + _O₂ + _H₂O

Timed ! in which of these statements are protons, electrons, and neutrons correctly compared? quarks are present in protons and neutrons but not in electrons. quarks are present in protons, neutrons, and electrons. quarks are present in neutrons and electrons but not in protons. quarks are present in protons and electrons but not in neutrons.