Note the Myoglobin O₂ binding curve below. YO2 1.00 0.80 0.60 0.40 0.20 0.0 Myoglobin O₂ Binding Curve 0 2 5 1.6 moles of O₂ 1.0 moles of O₂ 0.4 moles of O₂ 0.2 moles of O₂ 10 15 20 25 30 po₂ (torr) How much O₂ is released by 4 moles of myoglobin moving from pO₂ = 10 torr to pO₂ = 2 torr?

The following equation represents a reversible decomposition: CaCO3(s)CaO(s)+CO2(g) Under what conditions will decomposition in a closed container proceed to completion so that no CaCO3 remains?

Classify each of the following statements as true or false. aSome equilibria depend on a steady supply of a reactant in order to maintain the equilibrium. bBoth forward and reverse reactions continue after equilibrium is reached. cEvery time reactant molecules collide, there is a reaction. dPotential energy during a collision is greater than potential energy before or after the collision. eThe properties of a transition state are between those of the reactants and products. fActivation energy is positive for both the forward and reverse reactions. gKinetic energy is changed to potential energy during a collision. hAn increase in temperature speeds the forward reaction but slows the reverse reaction. iA catalyst changes the steps by which a reaction is completed. jAn increase in concentration of a substance on the right-hand side of an equation speeds the reverse reaction rate. kAn increase in the concentration of a substance in an equilibrium increases the reaction rate in which the substance is a product. lReducing the volume of a gaseous equilibrium shifts the equilibrium in the direction of fewer gaseous molecules. mRaising temperature results in a shift in the forward direction of an endothermic equilibrium. nThe value of an equilibrium constant depends on temperature. oA large K indicates that an equilibrium is favored in the reverse direction.

Substances that poison a catalyst pose a major concern for many engineering designs, including those for catalytic converters. One design option is to add materials that react with potential poisons before they reach the catalyst. Among the commonly encountered catalyst poisons are silicon and phosphorus, which typically form phosphate or silicate ions in the oxidizing environment of an engine. Group 2 elements are added to the catalyst to react with these contaminants before they reach the working portion of the catalytic converter. If estimates show that a catalytic converter will be exposed to 625 g of silicon during its lifetime, what mass of beryllium would need to be included in the design?

Determine rxnH 25 C for the following reaction: NO g O2 g NO2 g This reaction is a major participant in the formation of smog.

. Hydrogen gas and chlorine gas in the presence of light react explosively to form hydrogen chloride H2(g)+Cl2(g)2HCl(g)The reaction is strongly exothermic. Would an increase in temperature for the system lend to favor or disfavor the production of hydrogen chloride?

Ammonia is a weak base that reacts with water according to this equation: NH3(aq)+H2O(l)NH4+(aq)+OH(aq) Will any of the following increase the percent of ammonia that is converted to the ammonium ion in water? (a) Addition of NaOH (b) Addition of HCI (c) Addition of NH4CI

For each of the changes listed will the rate of the following chemical reaction increase, decrease, or remain the same? Fe(s)+2HCl(aq)FeCl2(aq)+H2(g) a. the concentration of HCl is decreased b. the iron is ground into a powder c. a catalyst is added to the reaction mixture d. the temperature of the solution is decreased

この 云 10 Free Energy (kcal/mol) [Review Topica] [References) 25 15 B A. Reaction progress Use the reaction energy diagram above to answer the following questions. Calculate the activation energy, AGt, for the step B to C. kcal/mol Calculate the overall energy change, AG°, for the process A to B. kcal/mol Which step is faster, (a) C to B or (b) B to A? Submit Answer Retry Entire Group 8 more group attempts remaining MacBook Air DD 08 OL F7 F8 64 F4 F5 & * $ % 8. :]:1:/

The graphs below show the relative concentration of N₂O4(g) and NO2(g) as various stresses are exerted on the equilibrium system N₂O4(g) + heat 2 NO2(g). (Note: The graphs are not drawn to scale.) Graph M Concentration (mol/L) Concentration (mol/L) Graph N Graph M Graph P N₂O4(2) Graph O NO 20 Reaction coordinate N₂OA NO2(g) Graph O Reaction coordinate 1. 2. 3. Concentration (mol/L) Match each of the graphs with the appropriate stress. 4. Concentration (mol/L) N₂O) NO ₂0 Reaction coordinate N₂O) NO 21 Graph N Graph P Reaction coordinate removing NO2(g) cooling system adding heat adding N₂O4(g)