How many kilojoules of heat will be released when exactly 1 mole of manganese, mn, is burned to form mn3o4 at standard state condaition?

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

What type of electromagnetic waves does the human eye see as the colors red blue or green a visible light waves b radio waves c infrared waves d microwaves

State one important difference between a physical change and a chemical change?