POSSIBLE (1-6) Which statement best describes the energy involved when an electron goes from shell 3 to shell 1 as shown in picture below.

1: Light energy is being absorbed
2: Heat energy is being emitted
3: Light energy is being emitted
4: Heat energy is being absorbed

Imagine that you own a property that is exactly 2.2 acres large. you want to sell your property, but your realtor tells you that you cannot sell your land by the acre. in order to sell your land you need to determine the area you own in units of square meters? given that there are 1.6 kilometers in 1 mile and 640 acres in 1 square mile, what is the area of land that you own in square meters square meters?

Ibeg i need 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?

Is powdered sports drink ionic or covalent ? 10pts !