Qué tipos de reacción representa cada una de las siguientes ecuaciones químicas FeS + 2HCl → FeCl2 + H2S

NH2OH → NH2 + H2O

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

What type of context clue you understand the meaning of  quandary?

Match the term to its description match term definition chemical energy a) internal energy caused by vibrations of atoms and molecules electrical energy b) electromagnetic energy that travels in waves radiant energy c) the movement of an electrical charge thermal energy d) potential energy stored in the bonds between atoms