Plutonium-239 is the primary isotope of plutonium used in nuclear energy. If a nuclear reactor has 5.00 grams of Pu-239, how much would remain after 7 half-lives? 

 Based on the graphs below which of the following statements is/are correct The reaction is zero order with respect to A. Increasing the concentration of the reactant by a factor of 3 (3x) will not change the rate of the reaction. The half-life of this reaction stays constant as time goes on.

At a certain temperature the following reaction has an equilibrium constant KC= 3.65  x 102. Determine the equilibrium concentration of HBr if a scientist adds 0.522 M of H2 and Br2 to a vessel. H2(g) + Br2(g) ⇌2HBr(g)

What is the correct equilibrium expression for the following reaction? 2Um(g) + 2Z(l) ⇌ 3J(aq) + 3A(g)

For the following reactions, at 30 oC, a researcher adds 0.453 M X2 and 0.550 M Y2. X2(g) + 3Y2(g) ⇌2XY3(g) The researcher determined there was 0.280 M XY3 at equilibrium. What is the KC for this reaction at 30 oC?

What is the correct equilibrium expression for the following reaction? 2X(g) + 2Y(l) ⇌ 2Q(aq) + 3R(aq)

A flask of Super Kami Water from the world of Dragon Ball has an H₃O⁺ concentration of 4.9 × 10-4 M at 25.0 °C. What is the concentration of OH⁻ in the Super Kami Water?

Which of the following is the non-zero price for which the total revenue is zero?

Which of the following statements is/are correct. At equilibrium the concentration of reactants and products stay constant At equilibrium the rate of the forward reaction is greater than the rate of the reverse reaction At equilibrium forward and reverse reaction stop

Part A- The initial rate of the reaction of X and Y was measured at 25 °C using various concentrations of X2 and Y2. The data collected is shown in the table below: 2X2(g) + Y2 (g) → 2X2Y(g) Experiment , (M) , (M) Initial Rate, (M/s) 1 0.022 0.015 1.25 x 10-2 2 0.044 0.015 2.50 x 10-2 3 0.022 0.030 1.25 x 10-2   1) Determine the rate law of the reaction above, show all your work.     Part B- Below is the reaction profile for the reaction in part A use it to answer the questions below. 2) What is the rate limiting step of the reaction Step 1 or Step 2? Explain your reasoning? 3) Is the reaction exothermic or endothermic? Why? 4) What is the ΔH of the overall reaction? Show your work?   Part C- Using information from Part B answer the following 5) Predict the sign on delta S for the reaction? And explain your reasoning. 2X2(g) + Y2 (g) → 2X2Y(g) 6) Predict the spontaneity (Delta G) of this reaction and explain your answer.   Part D- Use the information in Part A and Part B and the proposed mechanism shown below to answer the following questions about this overall reaction: 2X2(g) + Y2 (g) → 2X2Y(g) Proposed mechanism: Step 1: X2 (g) →  2X (g) Step 2: 2X(g) + X2 (g)+ Y2 (g)→ 2X2Y (g) 7) Identify any intermediates present? Explain your answer. 8) Identify any catalyst present? Explain your answer. 9) Is the reaction mechanism valid? Why or why not? Explain your reasoning in 1-2 sentences.