On a hot day, the wood gate on the side of my house gets stuck and I have to push very hard to get it open and shut. Describe *on the molecular level* why this is happening. Use these terms in your kinetic energy, molecules

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together