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1. A buffer is prepared by adding $ \mathbf{1 5 . 0 0} \mathrm{g} $ sodium acetate ( $ \mathrm{MM}= $ $ 82.0343 \mathrm{~g} / \mathrm{mol} $ ) and 12.50 g acetic acid (MM= $ \mathbf{6 0 . 0 5 2} \mathrm{g} / \mathrm{mol}) $ to enough water to make 500 mL of solution. a. What is the $ \mathbf{p H} $ of the buffer? b. The buffer is diluted by adding enough water to make 1.50 L of solution. What is the pH of the diluted buffer? 2. A buffer is prepared by adding 5.50 g ammonium chloride (MM $ =53.491 \mathrm{~g} / \mathrm{mol} $ ) and 0.0188 mol of ammonia to enough water to make 155 mL solution. a. What is the $ \mathbf{p H} $ of this buffer? b. If enough water is added to double the volume, what is the pH of the solution? 3. A solution with a $ \mathbf{p H} $ of 8.73 is prepared by adding water to 0.614 mol of NaX to make a 2.50 L solution. What is the pH of the solution after 0.219 mol of HX is added? 4. An aqueous solution of 0.057 M weak acid, HX has a pH of 4.65. what is the pH of the solution if 0.018 mol KX is dissolved

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Match each inhibitor type to its effect. Competitive Noncompetitive Uncompetitive [Choose] ? [Choose] Decreasing the Vmax Decreasing the Vmax and apparent Km Increasing the Km

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Two populations of rattlesnakes were monitored. Population A lived in a 10 square mile area and had a population size of 100, Population B lived in a 100 square mile area and had a population size of 500.

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Cell signaling Question 18 options: a. Upon activation by insulin, the insulin receptor directly phosphorylates substrate proteins. b. Epinephrine can cause either vasodilation or vasoconstriction, depending on the specific type of adrenergic receptor that it activates. c. Alpha-bungarotoxin is a snake toxin that specifically targets the nicotinic acetylcholine receptor. d. Both a) and b) are correct and c) is incorrect e. Statements a), b) and c) are all correct

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If matrix A is 3 x 5, matrix B is 5 x 2 and matrix C is 2 x 4, what are the dimensions of AB + C?

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[25 pts.] Given the circuit below; a. Draw the two circuits for determining the h parameters. b. Find the h parameters for the T circuit in terms of $R_1$, $R_2$, and $R_3$. c. Evaluate the parameters when $R_1 = 1 \Omega$; $R_2 = 4 \Omega$, and $R_3 = 6 \Omega$

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a. [5 points] Given p=23, q=7, and e=5, generate the public key (n,e) and the private key (n,d) using RSA Key generation algorithm. b. (5 points) Given Bob's public key of (85, 7) and private key of (85, 55), show how Alice can encrypt m=10 to send to Bob. Show the ciphertext. c. (5 points) Given Bob's public key of (85, 7) and private key of (85, 55), show how Bob can decrypt the ciphertetx y=8 received from Alice. Show the plaintext. d. [5 points] Using the fast exponentiation method (page 182), determine $3^{25} \mod 37$. Show your work.

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modulo-2 adder X1 X2 X3 X4 ? output clock Figure 2: Linear feedback register 2.

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Which of the following would not appear on a firm's accounting statement? Insurance costs Sunk costs Explicit costs Implicit costs Fixed costs

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7 El resultado de las potencias dadas es: La potencia de 2 equivalente a $4^3 \times 8^2$ es:

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