Para que serve o balanceamento de equações químicas?

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Nonpoint source pollution is difficult to control because it

When water dissociates, each water molecule splits into a hydroxide ion and a) h 3 o + b) a hydrogen atom c) a hydrogen ion d) h 2 o e) oh —