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elizabeth s-ez

elizabeth s.

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Complete the balanced chemical equation for the following reaction between a weak acid and a strong base. $H_2S(aq) + 2 KOH (aq) \rightarrow K_2S(aq) + 2 H_2O (l)$

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Which of the following is true for two objects that have the same mass, but Object 1 has twice the volume of Object 2?a) Object 1 will have a density that is twice that of Object 2.b) Object 2 will have a density that is half that of Object 1.C) Objects 1 and 2 will have the same density.d) Object 1 will have a greater density.e) Object 2 will have a greater density.

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Select three names for the angle.. \angle QRS \angle QSR \angle 8 \angle R \angle SQR \angle S8Q

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If different interviewers assessing the same person cannot come up with the same results, the concept of ______ holds that the instrument cannot possibly be measuring what it is intended to measure. test-retest reliability interrater reliability construct validity internal consistency

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The activation energy of a certain reaction is 34.2 kJ/mol. At 22 °C, the rate constant is 0.0120s?¹. At what temperature in degrees Celsius would this reaction go twice as fast? Express your answer with the appropriate units.

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Calculate the value to be used for Capital gains tax. Share matching rules Q12: Jessica currently owns 6,000 Hardman plc shares. Her transactions in these shares have been as follows: 26 June 2023 Bought 10,000 shares for £1.20 each. 16 February 2024 Sold 8,000 shares for a total of £15,000. 10 March 2024 Bought 4,000 shares for £2.00 each. Required: Calculate the net chargeable gain arising in 2023-24 on Jessica's disposal of Hardman plc shares.

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Consider the following reaction and associated information for Problems 2 and 3. 4 NH$_3$(g) + 5 O$_2$(g) $\longrightarrow$ 4 NO(g) + 6 H$_2$O(g) Rate = k[NH$_3$]$^2$[O$_2$]$^{1/2}$ 2. Which of the following is a correct representation of the relationship between the average rate of reaction and the concentration of chemicals? A. 4(rate) = $\frac{\Delta[NH_3]}{\Delta t}$ B. rate = $(\frac{1}{4})(\frac{\Delta[NH_3]}{\Delta t})$ C. 5(rate) = $-(\frac{\Delta[O_2]}{\Delta t})$ D. 4(rate) = $-\frac{\Delta[NO]}{\Delta t}$ E. rate = $-(\frac{1}{6})(\frac{\Delta[H_2O]}{\Delta t})$

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Two 2.7 cm-diameter disks face each other, 3.0 mm apart. They are charged to \pm 14 nC. What is the electric field strength between the disks? Express your answer with the appropriate units. A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have to just barely reach the positive disk? Express your answer with the appropriate units.

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(a) Using the potential energy formulation, $\pi_T = \int_0^L \frac{1}{2}k \left(\frac{dT}{dx}\right)^2 dx - \int_0^L Q T dx + \frac{1}{2}h(T_L - T_\infty)^2$ Prove that the element conductivity matrix is: $[k_T] = \frac{k}{l_e} \begin{bmatrix} 1 & -1 \ -1 & 1 \end{bmatrix}$

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USING THIS INFORMATION Table 1: Variation of absorbance with changes in the copper ion concentrations Copper Ion Concentration (ppm) 0 10 100 500 1000 Absorbance (@806 nm) 0.000 0.002 0.033 0.115 0.226 ppm = parts per million = mass (g) of copper ion per 1 000 000 g solution Filtrate after removal of copper ions 0.088 SOLVE : 2. Determine the concentration of copper ions in the filtrate using the data collected in part B of this report. Show all calculations. (Individual work) /2 3. Comment on the efficiency of the precipitation of copper ions from your copper sulfate solution. (Individual work) /2

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