Is a burning log an exothermic or endothermic event if the log is the system?

One or more substances changing into one or more substances is an example of a

How does a noncompetitive inhibitor reduce an enzyme’s activity?

Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons