An oxide of cobalt has the formula Co2O3
Which cobalt ion is present in this oxide?

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

An uncovered pot of water lies out in the sun. which statements correctly describe what happens at the surface of the liquid water? 1. the vapor pressure remains constant regardless of the water temperature. 2. the vapor pressure is produced by water molecules that have evaporated. 3. the vapor pressure increases as the sun heats the water in the pot. 4. evaporation stops once the vapor pressure reaches a certain point. 5. evaporation and condensation both occur on the liquid’s surface.

50 points - answer entirely - will reward brainliest