Their was a watch and learn assignment and I wasn’t paying attention and we had questions so if you guys have ever done this before please help me out. You can’t answer if you haven’t your teacher conduct this experiment or if you have answers from a friend or something

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?