Two positive charges are placed as shown in the diagram. Which arrow best represents the electrostatic force from the white positive charge onto the yellow positive charge?
O A- towards
OB-away
O C-up
O None of the above

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

How many atoms are there in 5.70 mol of mg