Which statement describes magnetic field lines at the north and south pole of a bar magnet?

a. field lines begin near the magnet's south pole and extend toward its north pole
b. field lines begin near both the magnet's north and south poles and meet in the middle
c. field lines begin near the center of the magnet and extend toward the north and south poles
d. field lines begin near the megnet's north pole and extend toward it's south pole

What is the molar mass of potassium nitrate, kno3

The valence of aluminum is +3, and the valence of the chlorine is -1. the formula fir the aluminum chloride is correctly written as

How is electrolysis most commonly used to produce an energy source? a - splitting water molecules produces oxygen, which organisms breathe to fuel their bodies. b - splitting water molecules produces hydrogen gas, which is used to power machines through hydrogen fuel cells. c - splitting carbon dioxide molecules produces coal, a form of carbon that can be burned to produce heat. d - splitting carbon dioxide molecules produces natural gas, which can be burned to generate electricity in power plants.