Concentration [M] Absorbance Solution 1 86.29 0.64 Solution 2 51.986 0.29 …. Fig 1: [graph of the calibration curve, make sure to show: function, R2, 0 intercept]
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|
|
Concentration [M] |
Absorbance |
|
Solution 1 |
86.29 |
0.64 |
|
Solution 2 |
51.986 |
0.29 |
|
…. |
|
|
|
|
|
|
Fig 1: [graph of the calibration curve, make sure to show: function, R2, 0 intercept]
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- Use the data in Figure 4.8 to estimate the ratio of radiation intensity at 10,000 Å (infrared) to that at 5000 Å (visible) from a blackbody at 5000 K. How will this ratio change with increasing temperature? Explain how this change occurs.A particular liquid crystalline substance has the phasediagram shown in the figure. By analogy with the phasediagram for a nonliquid crystalline substance, identify thephase present in each area.Given that ln(A1) = ln(A0) – kt1 ……….. (i) ln(A2) = ln(A0) – kt2 ……….. (ii) Where A1 = A0 - x1 A2 = A0 - x2 Y = x2 – x1 Prove that x(1)={Ao-[y/(1-e^-k(t2-t1)]} Using SOUND, BALANCED NUCLEAR EQUATION/REACTION AND PRINCIPLE ONLY, explain “How does KI work to help mitigate the effect of exposure to radiation?” http://www.thestar.com/news/article/954546--radiation-fears-spark-run-on-iodide-pills ® ® ® “the SOURCE OF HEAT that resulted in the melt-down at the Fukushima-nuclear-reactor?” [Actual balanced nuclear equations showing heat generated or absence of certain things required for full point]…
- Apply the Q test to the following data sets to determine whether the outlying result should be retained or rejected at the 95% confidence level. a. 85.10, 84.62, 84.70b. 85.10, 84.62, 84.65, 84.70Determine the molecular mass and nominal mass of phenol, C,H,OH. molecular mass: Da nominal mass: Da Determine the molecular mass and nominal mass of 1,2-dibromoethane, C,H,Br,.auDUIUance UI U.I JU ai 4JJ IIII III 1. UU CIII cuvclic. Calculate the molar absorptivity of the pigment at 453 nm? Q5) A student is tasked to determine the number of moles of H2SO4 (aq) in a 200 ml of an unknown solution. The student prepares a series of solutions with known concentrations of H2SO4 (ag) and measures the absorbance of each at an appropriate wavelength. These data are used to construct the calibration plot shown below. 1.00 0.80- 0.60 - 0.40- 0.20- 0.00- 3 x 10-4 6 x 10-4 Concentration (mol/L) If the absorbance of the unknown solution is 0.70, how many moles of H2SO4 (aq) does the 200 ml sample contain? Absorbance
- a laccd sign i X C tab McGraw-Hil X A ALEKS-Shu X https://www-awu.aleks.com/alekscgi/x/Isl.exe/1o_u-lgNslkr7j8P3jH-IvUrTNdLZh5A8CnG03PBGuXr8iCPa7ZMmym9HtY-pEBmXkvCfq... O CHEMICAL REACTIONS Calculating ion molarity using solute mass shift ↑ Calculate the molarity of Cl anions in the chemist's solution. Be sure your answer is rounded to the correct number of significant digits. caps lock esc Explanation ALEKS A chemist prepares a solution of vanadium(III) chloride (VC13) by measuring out 1.50 g of VCl₂ into a 300. mL volumetric flask and filling to the mark with distilled water. ILION K →1 E mol L ? Type here to search A Graw X HI Check 12 (8) 2 Z W S # 3 X alt $ D 4 C x10 f5 % X 100 LO 5 V f6 4- (0) 6 ALEKS G 14.1 f7 4+ & Y B hp 7 X H McGraw-Hi x A ALEKS-Shix Sign In 시기 fg IAA * © 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessibilit # a @ 76°F ㅅ 11:03 7/25/2 00 8 N 19 DII 9 fo K M DDI 2/5 0 P 12 insert [ = X + alt prt sc 46 Shusha 0 1 A backs paus cteFor the equation 2K + Cl2------>2KCl. I understand Cl is diatomic , but where does the 2 in front of the K come from.I need step by step process solving [4.184x156(Tf-295)] + [4.184x85.2(Tf-368)] = 0. because my work is wrong. Thank you!!
