2023 ACJC H2 Chem Prelim P4 QP-12

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Calculate the molar concentration of Fe3+ and SCN- in each of the three unknown samples (sample 4,7,and 10) made from Table 2 immediately after each sample was prepared, before the reaction occurs at all.

How do you fill out this chart with this imformation? Please help with a step by step along with equations.

Based from the given problem, What is the molecular weight and meq of potassium biphthalate (C8H5KO4)?

19. What type of sample analysis usually operates on the 10-4 g scale of sample size? A. macro analysis C. micro analysis B. semi-micro D. ultra-micro analysis analysis 20. Under what classification does a constituent group when its concentration is between 100 ppm and 1ppb? A. Major constituents B. Interferences C. Minor D. Trace constituents constituent

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Using their Ksp values, find the solubility of CaCO3, Ba3(PO4)2 and PbSO4 in Ksp(CaCO3) = 8.7 x 10-9 Ksp(Ba3(PO4)2 = 6 x 10-39        Ksp(PbSO4) = 1.3 x 10-8

I need the answer for this question as Sage Math Code. It's a linear algebra

Cengage Learnir × | Cengage Learnir x | Cengage Learnir X OWLv2 | Online X × Ar Ex3 CH 14 and 15 prod03-cnow-owl.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?lo Question 1 1pt This question has multiple parts. Work all the parts to get the most points. Question 2 1pt Question 3 Question 4 2 pts 2 pts Data in the table were collected at 540 K for the following reaction: Question 5 1 pt CO(g) + NO2(g) → CO2 (g) + NO(g) Initial concentration (mol/L) Initial rate Question 6 Question 7 2 pts 1pt [CO] [NO2] (mol/L. h) 5.1 × 10-4 Question 8 Question 9 2 pts 1pt Question 102 pts Question 111pt 0.35 x 10 4 3.9 × 10-8 5.1 x 10-4 0.70 × 10-4 7.9 x 10-8 5.1 × 10-4 0.18 × 10-4 2.0 × 10-8 1.0 × 10-³ 0.35 × 10-4 7.7 × 10-8 Question 12 1 pt 1.5 x 10-3 0.35 × 10-4 1.2 × 10-7 Question 13 1 pt Question 14 1pt Question 151 pt a Determine the reaction order with respect to each reactant. Order with respect to CO: 1 ✓ ✓ 4 Order with respect to NO2: 1 V✓ Progress: 13/15 items Due Mar 28 at…

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The protein content of the unknown samples were determined using BSA as standard. The absorbance values of the standard solutions and samples are as follows. BSA concentration (mg/mL) Absorbance 0.000 20 0.110 40 0.192 60 0.248 80 0.325 100 0.400 120 0.460 a. What is the equation of the line? b. Determine the protein concentration of samples in ug/mL. Sample dilutions 1 in 14 A540 0.150 1 in 5 1 in 8 0.380 0.235

A piece of Gold weighing 12,359 Kg is suspected of being contaminated with Iron. To perform an instrumental analysis and To confirm whether or not it contains Fe, a portion of the sample (0.954 g) is taken from the piece and dissolved with 25 mL of aqua regia. Heats up For its complete dissolution, it is cooled and made up to 100 mL. A 10 mL aliquot is taken from this solution and made up to 50 mL. From This last solution is given the appropriate treatment to visualize Fe+2, for which the 1,10-phenanthroline reagent is added. (it forms a complex that is red in color) and is taken to a visible spectrophotometer and with a 12 mm cell a absorbance of 0.45. Previously, a calibration curve of Fe+2 was obtained under the same instrumental conditions obtaining the following data: (view table) Calculate the purity of the gold piece, assuming impurities only due to Fe.

The PCC (1-piperidinocyclohexane carbonitrile) content of a clandestinely synthesized PCP (phencyclidine) sample can be determined by precipitating and weighing the product: PCC + Phenylmagnesium Bromide → PCP MW = 186.258 g/mole MW = 181.31 g/mole MW 243.387 g/mole In one analysis, 0.702 g of sample was dissolved in 25 mL of cylcohexanone and 1 g of phenylmagnesium bromide was added. After 25 minutes, the precipitate was filtered, washed with acetone, dried at 110°C, and found to weigh 0.869 3 grams. Find the recovery in wt% of PCC in the sample. In another analysis, the same sample was found to contain 5.17% of another impurity. What is the separation factor of this impurity in relation to PCC?

1.) Which solutions should you have used to make your Beer's Law Plot? 2.) What property of the product of your reaction allowed you to use visible spectroscopy to analyze your results? 3.) Using your absorbance value from Equilibrium mixture 5 (E5), show your calculation for the concentration of FeSCN^2+ in sample E5. (Provided picture for the resources)