2 is the correct answer because with 2O2 molecules it balances the chemical equation.
Hope that helps
The textbook Would most likely have more gravitational potential energy because it is heavier. Things that are heavier have a larger gravitational pull and are pulled to the earth faster
Its most significant when all other forces are absent
A Physical Change is what the change of ice is
A physical change<span> in a substance doesn't </span>change<span> what the substance is. In a </span>chemical change<span> where there is a </span>chemical reaction<span>, a new substance is formed and energy is either given off or absorbed.</span>