What is the value of the equilibrium constant for this redox reaction? 2cr3+(aq) + 3sn2+ (aq) 2cr(s) + 3sn4+(aq) e = -0.89 v a. k = 5.13 x 10-93 b. k = 6.27 x 10-91 c. k = 7.92 x 10-46 d. k = 8.56 x 10-31 e. k = 9.25 x 10-16

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

Which is not true regarding reaction rates? (2 points) catalysts are not used up in the reaction. catalysts speed up reactions by lowering the activation energy. reaction rates decrease as the concentration of reactants decrease. during reactions, concentrations of all reactants decrease at the same rate.

Achemist tests new mixtures for paint samples and decides one mixture's stickiness makes it worthless. a scientist working in a nearby lab suggests a different use for this sticky mixture. which statement best describes this situation?