Consider the following three-step reaction pathway. Step 1: (CH3)3AuPH3 (CH3)3Au PH3 (fast)
Step 2: (CH3)3Au (CH3)Au C2H6 (slow)
Step 3: (CH3)Au PH3 (CH3)AuPH3 (fast)
Which is the correct list of reaction intermediates from the reaction pathway above?
A.) (CH3)3AuPH3, (CH3)3Au, and (CH3)Au
B.) PH3 and (CH3)Au
C.) (CH3)3AUPH3 and C2H6
D.) PH3, (CH3)3Au, and (CH3)Au

1. they vary with a higher number because boiling is way hotter than melting

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.