a hypothetical chemical reaction with a single reactant and negligible back reaction is 40.0% complete after 185s at some fixed temperature if the initial concentration is 0.1mol per liter. If the reaction is first order, find the rate constant and the half-life​

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.