Identify the following reaction type
Na2O + CaCl2 -->

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 a property of a double replacement reaction

Name the element in group 17, period 2. (periodic table)