How many significant figures are in the measurement 0.003 4 kg

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

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

Nan element’s square on the periodic table, the number with the greatest numerical value represents the