What is the difference between the nitrite ion and the nitrate ion?

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

At room temperature what happens to the average kinetic energy of the molecules of a solid, liquid, and a gas

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure