What is the chemical formula of Be+2 and N-3?

Nonpoint source pollution is difficult to control because it

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?