Achemist wishes to detect an impurity in a certain compound that she is making. there is a test that detects an impurity with probability 0.90; however, this test indicates that an impurity is there when it is not about 5% of the time. the chemist produces compounds with the impurity about 20% of the time; that is, 80% do not have the impurity. a compound is selected at random from the chemist’s output. the test indicates that an impurity is present. what is the conditional probability that the compound actually has an impurity?

Achemist wants to extract copper metal from copper chloride solution. the chemist places 0.50 grams of aluminum foil in a solution containing 0.75 grams of copper (ii) chloride. a single replacement reaction takes place. (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction? a) approximately 0.36 grams, because copper (ii) chloride acts as a limiting reactant b) approximately 1.8 grams, because copper (ii) chloride acts as a limiting reactant c) approximately 0.36 grams, because aluminum acts as a limiting reactant d) approximately 1.8 grams, because aluminum acts as a limiting reactant