3. Kinetics study on the decomposition of phosphine at 950 K was done by injecting PH3 gas into a reaction vessel. Then, the total pressure at constant volume was measured. Given the balanced chemical reaction and data obtained in the study, 4 PH3 (g) → P4 (g) + 6 H₂ (g) Time (s) 0 40 80 120 PTotal (Torr) 100 150 167 172 a. Show the kinetic plots from zero- to second-order and select which order the reaction appears to obey using Linear Regression Analysis (R²) b. What is the rate law that describes this reaction?

2NO(g) +O2(g) →  2NO(g) The following kinetic data were obtained for the initial rates of disappearance of NO:  Expriment Initial Conc. of NO Initial Conc. of O2 Initial Rate Exp. 1 0.0125 M 0.0253 M 0.0281 M/s Exp. 2 0.0250 M 0.0253 M 0.112 M/s Exp. 3 0.0125 M 0.0506 M 0.0561 M/s What is the rate law for the reaction? Input the answer in the form rate = k[A]2[B]

2NO(g) +O2(g) →  2NO(g) The following kinetic data were obtained for the initial rates of disappearance of NO:  Expriment Initial Conc. of NO Initial Conc. of O2 Initial Rate Exp. 1 0.0125 M 0.0253 M 0.0281 M/s Exp. 2 0.0250 M 0.0253 M 0.112 M/s Exp. 3 0.0125 M 0.0506 M 0.0561 M/s What is the value of the rate constant for the reaction? Express your answer to three significant figures. Just enter the number  (e.g. 2.48x10^-4) and the unit.

In a study of the gas phase decomposition of dinitrogen pentoxide at 335 K N2O5(g)2 NO,(g) + ½ O2(g) the concentration of N2O5 was followed as a function of time. It was found that a graph of In[N,O3] versus time in seconds gave a straight line with a slope of -7.38×10-3 s and a y-intercept of -3.13. Based on this plot, the reaction is | order in N2O5 and the half life for the reaction i | seconds.

The overall reaction of ozone reacting to form oxygen has been proposed to occur in a reaction mechanism of: Step 1: O3(g)-→O2(g) + O(g) Step 2: O3(g) + O(g) →202(g) What is the role of O(g) and what is the overall balanced equation? Periodic Table and Datasheet Select one: O a. O(g) is an intermediate; 203(g) + O(g) →302(g) + O(g) O b. O(g) is a catalyst; 203(g) + O(g)→302(g) + O(g) O c. O(g) is an intermediate; 203(g) → 302(g) O d. O(g) is a catalyst; 203(g)→302(g) Which statement best describes general equilibrium?

Calcium oxide (CaO), an important ingredient in cement, is produced by decomposing calcium carbonate (CaCO3) at high temperature: CaCO3(s) → CaO(s) + CO2(g) In one particular reaction, 40 g of CaCO3 is heated at 450°C in a 5.0 L vessel. The pressure of CO2 is 0.12 atm after 7.0 minutes. What is the average rate of CO2 production in moles per minute during the 7 minutes? (Enter in mol/min.)   If you assume this rate of decomposition remains constant, how many minutes will it take for the entire sample of CaCO3 to decompose?

33) For the reaction PC15 (g) PC13 (g) + Cl2 (g) Kc= 0.0454 at 261°C. If a vessel is filled with these gases such that the initial concentrations are [PC15]= 0.2 M, [PC13] = 0.20 M, and [Cl2]= 2.25 M, in which direction will a %3D reaction occur and why? A) toward reactants becauseQ=1.8 B) toward reactants becauseQ= 0.0454 C) toward products becauseQ = 2.8 D) it is at equilibrium because Q=1 E) toward products becauseQ = 0.56