The solubility product of pbbr2 is 8.9 10-6. determine the molar solubility in the following. (a) pure water webassign will check your answer for the correct number of significant figures. m (b) 0.28 m kbr solution webassign will check your answer for the correct number of significant figures. 4.5e-4 incorrect: your answer is incorrect. seenkey 0.00011 your response differs from the correct answer by more than 100%. m (c) 0.24 m pb(no3)2 solution webassign will check your answer for the correct number of significant figures. m

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.

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