Which one is a true statement about endothermic reactions? question 2 options: energy is absorbed making it feel colder. the reaction container always feels hot. the reactants have less heat energy than the products. more heat is given off than is put into the reaction.

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

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car