In the chemical reaction below, all three chemicals are best classified as -- NaCl2O3 add heat NaCl + CIO2 three compounds O three elements O one element and two compounds one compound and two elements

yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes

explanation:

b. examine and describe cells

i think it's letter a.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.