9:37:09 24.0 YA :49|39% expert.chegg.com/exper = Chegg Time remaining: 01:50:25 Chemistry What is the free energy change associated with the passage of a pair of electrons from NADH to Oz if the passage of one proton from the matrix to the intermembrane space costs +20.1 kJ mol-1 as shown in Sample Calculation 15.3? Use 3 significant figures. AG= kJ mol-1 SAMPLE CALCULATION 15,3 Problem Calculate the free energy change for translocating a proton out of the mitochondrial matrix, where pHmatriy = 7.8, pHtrol = 7.15, Ay = 170 mV, and T= 25°C. Solution Since pH = -log (H (Equation 2.4), the logarithmic term of Equation 15.7 can be rewritten. Equation 15.7 then becomes AG = 2.303 RT(pH - pH) + ZFAy Substituting known values gives AG = 2.303(8.3145 J K-- mol-)(298 K)(7.8 - 7.15) +(1)(96,485 J- v-. mol(0.170 V) = 3700 J- mol- + 16,400 J- mol- = +20.1 kJ mol Your answer Typed answers are easier for students to read than handwritten notes Submit Skip

Use the information below to draw the dot cross model for Ethan molecule C2H6 accurately: 1 H. Hydrogen 1.008 C Carbon 12.011

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solve the question in the image and you may provide handwritten answer also.

Question 2 (20 pts) The decay of U-238 to Pb-206 can be used to estimate the age of inorganic matter. The half-life of U-238 is 4.5 X 10 years. In a particular rock sample, the ratio of the numbers of Pb-206 to U-238 atoms is 0.66. Assume all of the Pb-206 present is due to the decay of U-238. What is the age of the rock? -kt .693 -10 C=Coe Ty2: .693 K K= = 1.54 X10 4.5 410

The fraction recrystallized-time data for the recrystallization at 350°C of a previously deformed aluminum are tabulated here. Assuming that the kinetics of this process obey the Avrami relationship, determine the fraction recrystallized after a total time of 116.8 min. Assume y1 = 0.38 and y, = 0.73. Fraction Recrystallized Time (min) 95.2 126.6 i

This problem is (12.5) from a book  "Thermodynamics and Statistical Mechanics An Integrated Approach by M. Scott Shell"

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A saturated solution of sucrose was prepared at 30.0 °C using 500.0 g of water. How many grams of sucrose were required to prepare this solution?