C3H8O(l)+O2(g) balanced equation

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

What is the number of moles in 15.0 g ash3?

What is the mass of 8 moles of sodium atoms