Hydrogen gas explodes when burned with oxygen gas. Where does this energy come from?

work done on both oxygen and glucose molecules

kinetic energy of the oxygen molecules

kinetic energy of the hydrogen molecules

chemical bonds between hydrogen atoms and between oxygen atoms

Acm ruler with main graduations from 1 to 10 from left to right there are 10 secondary graduations between each of the main graduations there is a line that begins. at the left end of the ruler 10 secondary graduations to the left of the “1 main graduation the right end of the line ends on the eighth secondary graduation to the right of 3 how long is the line