Gas chromatography was used to analyse for residues of toxic solvents, including benzene and 1,2-dichloroethane (DCE), in a pharmaceutical preparation. The following conditions were used: Column: 30 m long capillary with polysiloxane stationary phase Carrier gas: He at 35 cm s–1 constant flow Oven program: 40 °C at t = 0, increasing at 10 °C min–1 to 240 °C at t = 20 min. Detector: flame ionisation (FID) Benzene eluted with retention time = 11.5 min, peak width = 0.26 min 1,2-dichloroethane (DCE) eluted with retention time = 11.8 min, peak width = 0.28 min (i) What are the strengths and limitations of the flame ionisation detector in this application, compared with other possible methods of detection? (ii) What is the resolution, RS, for the separation of benzene and DCE on this column? (iii) Suggest two ways by which the resolution of benzene and DCE might be improved. Explain your choices.

Raoults law- 2 significant digits

- c. Use the table space below to calculate k by linear regression. 1. c(NiCl₂) (M) 0.273 A 0.1365 0.0682 0.601 0.2047 0.451 0.300 0.151 ΣCA = k = ECA/Ec²= Text CA 0.164 0.092 0.041 0.010 Text c² 0.075 0.042 0.019 0.005 Ec²= Text

For a gas obeying Dieterici's equation of state for 1 mole is p(V - b) = RTe-a/RTV (i) (ii) Prove that the equation of the inversion curve is 2a RT a p = (22-27) exp (b), hence find the maximum inversion temperature Imax.

Estimate the mixing ratio of NO in the following condition: NOx = 30 ppb, 03 = 100 ppb, [M] = 2.5x1019 cm 3, INO2 0.015 s1, kNO+03 1.9x10 14 cm3s1. Answer in ppb and put value without unit.

Evolution of the Ge X SC 13.1 Solution Form.... M Gmail www-awu.aleks.com/alekscgi/x/Isl.exe/10_u-IgNslkr7j8P3jH-lvTqeviKFP6W0cqJcWJdIACROQwyw24GWHInUXFyQvdkZh5virDOPm Σ Significant Figures YouTube OKINETICS AND EQUILIBRIUM Using the general properties of equilibrium constants At a certain temperature, the equilibrium constant K for the following reaction is 9.53 × 10 5: H₂(g) + Cl₂(g) 2 HCl(g) Use this information to complete the following table. Explanation Q Suppose a 24. L reaction vessel is filled with 0.37 mol of H₂ and 0.37 mol of Cl₂. What can you say about the composition of the mixture in the vessel at equilibrium? What is the equilibrium constant for the following reaction? Round your answer to 3 significant digits. 2 HCl(9) H₂(9) + Cl₂(9) ← Maps G hess law organic c... What is the equilibrium constant for the following reaction? Round your answer to 3 significant digits. 3H₂(g) + 3Cl₂(9) 6 HCl(9) Check Depar # 3 с E 9 $ 4 R There will be very little H₂ and Cl₂. O There will…

Given the following data in the Determination of Molar Mass of CO2 lab : Mass (before rxn): test tube + HCl(aq) + stir bar + capsule Mass (after rxn): test tube + HCl(aq) + stir bar + capsule Volume of water displaced from squirt bottle Temperature of CO₂(g) 26.611 g 25.783 g 144 mL CO2(g) pressure Gas constant R 293.6 K 0.986 atm 0.08206 L'atm/mol.K a) Calculate the mass of CO₂(g) produced, in grams. b) Calculate the density of CO₂(g) in g/L. C) Calculate an experimental value for the molar mass of CO2 based on the mass, volume, and temperature data from the Determination of Molar Mass of CO₂ lab. d) Calculate the number of moles of CO₂(g) produced. Use the accepted value for the molar mass of CO2.

A. Draw structure of compound. B. Label base peak and molecular ion peak.

3.4. At 0°C, enthalpy of fusion of ice water is 1434,6 cal/mol. Volume of water in solid an liquid form are 1,098 and 1,001 ml/g, respectively. Determine the dP/dT for the melting proces and the melting temperature of ice water at 4 atm. Answer: Tfusion (4atm) = -0,0243 °C

I have set up my spreadsheet using this sample data and reproduced the result with a pKa of 4.64. true or false