Are there more bones in the arm than in the leg?

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

Explain what happens at the saturation point when adding salt to water at room temperature.

What volume of argon gas is equal to 1.60 grams of argon