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2. The decomposition of $$H_2O_2(aq)$$ in aqueous solutions is first order and proceeds by the reaction: $$2 H_2O_2(aq) \rightarrow 2 H_2O(l) + O_2(g)$$. It has a half life of 10.7 hours at $$20^\circ C$$. If you were starting with a 6.0% (by mass) solution of $$H_2O_2$$ [MW = 34.0] (which has a density equal to that of water), what would be the: a) Time needed to reduce the concentration to 3% (by mass) solution of $$H_2O_2$$? Plan: Ans. = 22 b) Initial rate of production of $$O_2(g)$$, in mole/L-hr, at the beginning of the reaction? Plan: Ans. =

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Consider the following cost function (C): Upper C equals 0.2 q cubed minus 3 q squared plus 80 q plus Upper FC=0.2q3-3q2+80q+F. Part 2 The equation for average cost LOADING... (AC) is: ACequals=0.2 q squared minus 3 q plus 80 plus StartFraction Upper F Over q EndFraction0.2q2-3q+80+Fq. (Properly format your expression using the tools in the palette. Hover over tools to see keyboard shortcuts. E.g., a superscript can be created with the ^() character.) Part 3 The equation for variable cost LOADING... (VC) is: VCequals=0.2 q cubed minus 3 q squared plus 80 q0.2q3-3q2+80q. (Properly format your expression using the tools in the palette.) Part 4 The equation for marginal cost LOADING... (MC) is: MCequals=enter your response here

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Which of the following ionic compounds has the highest (most negative) lattice energy? OMgF2 OSrF2 OLiF OKCl OSrI2 OCaCl2 ONaF

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Otis just retired and will start receiving monthly pension payments at the end of this month. The first payment is 5,000 and will increase by 100 each month. What would be the price of this perpetuity if the effective annual rate is 6%? [5,247,857.10] CORRECT ANSWER IS GIVEN IN PARENTHESIS

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2. (12 pts) Consider the solution to the equation below that is being solved for all radian solutions. Identify three errors in the solution and explain in words what the errors are. Errors are statements that are not true. Decisions that are different from those you might have made are not errors. After you identify the errors, solve the equation correctly. $3\sec{2\theta} + 7 = 1$ Subtract 7 from both sides: $3\sec{2\theta} = -6$ Divide both sides by 3: $\sec{2\theta} = -2$ Use the reciprocal identity: $\frac{1}{\sin{2\theta}} = -2$ Take the reciprocal of both sides (not an error): $\sin{2\theta} = -\frac{1}{2}$ Use the inverse sine function: $2\theta = \frac{2\pi}{3} + 2\pi n$ Divide both sides by 2: $\theta = \frac{\pi}{3} + \pi n$

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Match this video with the correct description of the enzyme's function. -0:06 Select one: a. unwinds the double helix by breaking the hydrogen bonding between the two strands at the replication fork b. reduces the torsional strain that builds up ahead of the replication fork as a result of unwinding c. binds to oric and causes a short section of DNA to unwind d. prevents the formation of secondary structures within single-stranded DNA e. connects Okazaki fragments by sealing nicks in the sugar-phosphate backbone

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What software packages and/or libraries can be used to integrate ODEs and evaluate eigenvalues?

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On December 3, Sunland sold HK$650,000 of merchandise on account to Culver Ltd., terms 2/10, n/30, FOB shipping point. The cost of the merchandise sold was HK$353,600. On December 8, Culver was granted an allowance of HK$29,500 for merchandise purchased on December 3. On December 13, Sunland received the balance due from Culver. a) Prepare the journal entries to record these transactions on the books of Sunland, using a perpetual inventory system. b) Assume that Sunland received the balance due from Culver on January 2 of the following year instead of December 13. Prepare the journal entry to record the receipt of payment on January 2.

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Given three discrete time data points in a real-time signal, calculate the three points in the DFT for these points. ‘ x(n) = 4.5, 6, 3.3 Show your results as complex numbers in cartesian form X(0) = X(1) = X(2) =

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Write down a program in Java that will do the following: a. Create an input file named randString.txt. Write 100 random strings in this file. The length of the string should be in the range of 3 to 10 (including 3 and 10). b. Read the contents of the file in step a) and sort it in ascending order (alphabetically ascending). c. Replace the contents in the randString.txt with the alphabetically sorted strings generated in step b).

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jeffrey f.