Use the graph from worksheet question 8 to calculate the activation energy of the reaction in units of kJ/mol.

A. Copper sulfate pentahydrate is often used to teach students about Beer’s Law by making a standard curve (linear regression). The bright blue color of the solution has a peak absorbance in the red range of the electromagnetic spectrum. The absorbance value is proportional to concentration. How many grams of CuSO4 5H2O to make up 250 mL of a 0.2 M stock of this solution? B. Using M1V1 = M2V2 how many mL would a student need to measure out in graduated cylinder to make up a 50 mL (V2) solution of 0.1M, 0.05 M, 0.025M 0.0125M solutions for a standard curve at the peak wavelenth for this compound?

em1.png Part 3: Q9 Average absorbance Flask 8 Flask 9 Flask 10 1:1 Ratio so, Flask 11 Part 3: Q Flask 8 Flask 9 Flask 10 Flask 11 Part 3: Q10 Flask 8 Flask 9 Flask 10 Flask 11 Part 3 0.146 0.166 [Fe] -0.002mol/L 0.215 0.294 [FESCN³mol/L) 4.59% 10 5.18*10* 6.64*10* 9.08*10* [FXmol/L) 5.00 *10* 5.00*10* Y=3362x-0.0083 R² = 0.9993 5.00*10* 5.00*10* (Amounts of flask 8 (9 - 11's values are in the spreadsheet) 71% volume 5.00mL Molarity of Fe(NO3))3 = 0.2M Volume of Fe(NO3))3 = 5.00mL Moles of Fe³= Molarity x volume(L) Moles of Fe¹ = 0.2M X 0.005L = 1x10-³mole x [SCN][mol/ 4x10 5×10-4 7x10 1×10 1 Concentration of Fe³ = mole of Fe³ Volume mole of Fe³1x10³ mole G.O05L 8, Average absorbance for solution 8 (same for 9 - 11) Average absorbance for flask 8 = sum of all absorbances / number of readings (0.145 +0.147 +0.148) 3 Using equation of calibration curve's line(slope) of best fit, the average absorbances of the unknown concentrations to determine [FeSCN-Jat equilibrium in solution 8:…

Pre-lab question #6-2: Calculate the percent (%) C2042- in Na2C204. 53.0 57.1 65.7 97.8

The concentration of gadolinium was measured in the discharge from a wastewater treatment plant near a large medical facility. Eight measurements were obtained: 1.411 ppm, 1.411 ppm, 1.401 ppm, 1.409 ppm, 1.979 ppm, 1.408 ppm, 1.419 ppm, 1.402 ppm. Use the Grubbs test to determine if one of these values is an outlier. What is the value of ?cal?

How would I do 2? the concentration iron is 1.85mg/vitamin tablet, and the absorbance at 508nm is 0.37

Can you help me on questions 2 AND 3

X b Answered X Co. How to Ca X N NSU Logir x PeriodicTal X M Action Rec X 0 mySigTau X G 4.25 ml to X NBA Final X G scientific X+ now.com/ilrn/takeAssignment/takeCovalentActivity.do?locator%3Dassignment-take [References] Ethene is converted to ethane by the reaction C,H4 (9) + H2 (g) Catalyst + C2H6 (9) C2 H4 flows into a catalytic reactor at 25.6 atm and 280.°C with a flow rate of 1100. L/min. Hydrogen at 25.6 atm and 280.°C flows into the reactor at a flow rate of 1400. L/min. If 13.6 kg C2 Hg is collected per minute, what is the percent yield of the reaction? Percent yield Submit Answer Try Another Version 2 item attempts remaining Previous Next Email Instructor Save and Exit Cengage Learning | Cengage Technical Support

Choose all correct answers for the following.Absorbance (A) is defined as:   Question 5 options:   2-log%T   εbc   log P/Po   -log P/Po

2. Add the absorbance of your Part III solution to the graph. Llse the of best fit of your qraph to calcuate its line concentration. Concentraton vs Absorbance 1.6 con c: 0.003M 1.4 1.2 0.8 0.6 0.4 0.2 0.0005 0.001 0.0015 0.002 0.0025 0.003 0.0035 Concentration Co.003M) Concentration you have calculated in 2 is CCrO, of Ag CrO4. calculate your experimental ksp of Ag CrO4. = [Cr O4]? Use it to 2. %3D ksp of AgCr Oy = CAg+] [CrO4] Absorbance te Out