In the copper plating solution lab, you placed copper (cu) pennies in vinegar. vinegar is a weak acid with hydrogen ions (h+). when you put the pennies in the vinegar, you should have observed small gas bubbles. what were these bubbles composed of, and how did they form

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.