What is the concentration (in grams per milliliter) of a solution of Na2HPO4 when 2.00L of it can be used to prepare 350gmL of 5.00L solution

The most efficient way to establish the best possible economizer position is to measure

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 are the charges of the subatomic particles by choosing the answer from the drop down menu. protons have a (+1,0,or-1). (protons,neutrons,electrons) have a 0 charge. 3.) electrons have a (+1,0,-1)