What is the atomic number of an oxygen atom that has 8 protons in its nucleus? 4 6 8 12

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

A40 kilogram skier starts at the top of a 12 meter high slope. at the bottom, she is travelling 10 meters per second. how much energy does she lose to friction