Numerade

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By adding 2 mL 1 M HNO3, 2 mmol BaCO3 is dissolved and quantitatively transferred to a 100 mL volumetric flask and diluted to the mark. Take 45 mL of the solution to an Erlenmeyer flask and add 10 mL NH3 solution to adjust the pH to 10.00. The analyte is then titrated with 0.03 M EDTA. (a) What’s the molarity of the NH3 solution. Note, a buffer solution is formed, for NH3, Kb = 1.8×10-5. (b) What is the pBa at equivalence point? log Kf = 7.88 for Ba2+, αY^4– = 0.30 at pH = 10.00.

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Where does a carbonyl stretch appear in an IR spectrum? 1800-1650 cm-1 1160-1030 cm-1 740-720 cm-1 3640-3250 cm-1

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Which of the following are types of inclusions in bacterial cells? Select all that apply. thylakoids ?magnetosomes ? carboxysomes volutin granules

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1. A 5.0 \times 10^2 kg prize-winning pumpkin is raised from the ground to a truck platform, a distance of 1.02 m. It takes a group of volunteers 3.3 s to lift the pumpkin onto the platform. Calculate; a. the work required to the raise the pumpkin (3 marks) b. the power of the lift (3 marks) 2. A nurse pushes a patient in a wheelchair up a 9.7 m ramp with a force of 92 N parallel to the ramp. The patient and wheelchair have a total mass of 67 kg and the ramp is 0.8 m higher at the top than at the bottom. a. Calculate the input work done by the nurse in pushing the patient up the ramp. (3 marks) b. Calculate the output work accomplished by raising the patient. (3 marks) c. Determine the efficiency of the ramp. (3 marks) d. How could the efficiency of the ramp be improved? (1mark)

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Question 21 of 30 What quantity of heat, in kJ, is required to convert 44.0 g of ethanol ($C_2H_5OH$) at 23.0 $^\circ$C to a vapor at 78.3 $^\circ$C (its boiling point)? (specific heat capacity of ethanol = 2.46 J/g $^\circ$C; $\Delta H_{vap}$ = 39.3 kJ/mol)

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Q#3: Show that if $a$ an odd integer is, then $a^2$ has the form $8k + 1$, for some $k \in \mathbb{Z}$. (20)

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(3) Mixing of two ideal gases A rigid insulated container contains 12 kg of oxygen at 150 kPa and 280 K separated by a divider from 16 kg of carbon dioxide at 400 kPa and 350 K. The divider is removed and the mixture comes to a uniform state. (a) Find the final temperature and pressure of the mixture. (b) Find the entropy generated during the mixing process in kJ/K.

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Consider the transfer function: $H(s) = \frac{6}{2s^4 + 8s + 3}$ a) Write lines of code to find the zeros and poles of the above transfer function. b) Write lines of code to find a partial fraction expansion of the above transfer function.

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Consider the hydrostatic equilibrium (v = 0). The equation is reduced to: 0 = -âˆ‡p + Ïf Let the air pressure be p0. Solve the hydrostatic pressure p(h) at a depth h in the pool (water density Ï = constant) when the external force is f = -gk, where g is the acceleration of gravity and k is the unit vector in the upward direction. (Note: you can select z = -h.)

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1-10. In a normally distributed set of data containing 28 658 scores, determine the number of scores that fall within the given condition. (10 points) A. Within one standard deviation away from the mean B. Within two standard deviation away from the mean C. Within three standard deviation away from the mean.

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joseph b.