NOTES: Mole Conversions (pg. 86 of NB) If I have a bundle of paper clips with a mass of 20 grams, how can you figure out
the NUMBER of paper clips in that bundle?
1 paper clip = 0.5 grams
If I have the NUMBER of paper clips, how do I determine the mass of all those
paper clips?
9 paper clips

I'll give the brainliest to the best answer

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.