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- The atomic hydrogen exists in space at an estimated concentration of one particle per cubic meter. If the collision diameter is 2.5 ×10^(–10) meter and the temperature is 2.7 Kelvin, how many kilometers away will the next potential collision be?For the reduction 2FeCl3 + SnCl2 =====➔ 2 FeCl2 + SnCl4 in aqueous solution the following data were obtained at 25oC t(min) 1 3 7 11 40 Y 0.01434 0.02664 0.03612 0.04102 0.05058 Where y is the amount of FeCl3 reacted in moles per liter. The initial concentrations of SnCl3 and FeCl3 were respectively, 0.03125, 0.0625 moles/L. a.)Show that the reaction is third order (derive the rate law), and b.) calculate the average specific rate constant.The percentage protein content of chicken breasts are determined 5 times and the following results obtained: 28.5, 30.1, 30.2, 30.0 en 30.2%. The first value (28.5%) appears anomalous. Should it be retained or rejected at a 90% confidence level? Show all equations.
- Chemistry An aquifer contaminated with petroleum is found to have the following component concentrations at a particular site: benzene158 ppm toluene124 ppm ethylbenzene91 ppm xylene45 ppm n-heptadecane161 ppm pristane 84 ppm Provide an estimate for the age of the spill at this site using (a) BTEX ratio and (b) nC17:Pr ratio. Show your calculations and use units throughout. Give proper s.f. for the answer.The atomic hydrogen exists in space at an estimated concentration of one particle per cubic meter. If the collision diameter is 2.5 ×10^(–10) meter and the temperature is 2.7 Kelvin, how many kilometers away will the next potential collision be? Express the answer in three significant figures.I AM NOT A NATIVE ENGLISH SPEAKER, PLS WRITE IT CLEAR. The following is a formulation of the decomposition of penta-nitrogen dioxide in 456K N2O5(g) → 2NO2(g) +1\2O2(g) ? = 6.35 × 10−3?−1 A 0.18 liter hard vessel located in the 456K was inserted N2O5(G) At a pressure of 1.22 atmospheres. the reaction above happend. 1. How long from the start of the experiment will the pressure in the system rise to 1.54 atmospheres? 2. Calculate the partial pressure of each component in the mixture 100 seconds from the start of the experiment. 3. It was found that at a temperature of K 400 the value of the rate constant for a decomposition reaction of a nitrogen Fanta-oxygen equals 5.42*10-3 sec-1. Calculate the operating energy for the reaction. in all sections show calculations.
- A chemist obtained the following data for percent lindane in the triplicate analysis of an insecticide preparation: 7.23, 6.95, and 7.53%. Calculate the 90% confidence interval for the mean of the the three data, assuming that (a) the only information about the precision of the method is the precision for the three data. (b) on the basis of long experience with the method, it is believed that s---->σ lindane. (c) If s=0.28 is good estimate of σ, how many replicate measurement should be made in order for the mean for the analysis of sample to be within 0.2% of the true mean 90% of the time.Potassium dichromate has several industrial applications. To determine the purity of the salt that will be used in different industrial processes, a sample mass equal to 2.660 g was dissolved and quantitatively transferred to a 500.00 mL flask. An aliquot of 25.00 mL of this solution was treated with excess KI and the released iodine was titrated with 0.1000 mol L-1 sodium thiosulfate, spending 27.00 mL. Calculate the purity of the analyzed salt. Data:K = 39.10 O = 16.00 Cr = 52.00 I = 126.9 S = 32.07The slope of an Arrhenius plot was found to be -4570 K, and the intercept was found to be 3.3 with the time plotted in seconds. What is the frequency factor? Enter your answer with two sig figs.
- Three large proteins are ionized at the pH at which an electrical FFF separation is carried out. (i) if the ions are designated A2+, B2+, and C3+, predict the order of elution. (ii) What is FFF? (iii) List the four subtechniques of FFF.2AB2(g) = A2(g) + 2B2(g) A 500,0 ml ask is filled with 0,384 mol of AB2. the appearance of A2 is monitored at timed intervals. assume that temprature and volume are kept constant. the data obtained are shown in the table below. time/min : 0 10 20 30 40 50 moles of A2 : 0 0,0541 0,0833 0,1221 0,1432 0,1567 a. make a similiar table for the dissapearance of AB2 b. what is the average rate of dissapearance of AB2 over the second and the third 10 minutes intervals? c. what is the average rate of appearance of A2 between t=30 and t=50?kindly help me with this problem Thank you! Subject: Physical Chemistry Instructions: solve as neatly as possible and show complete solution.No rounding-off for your decimals (include all decimals in your calculator in your computation). The following data were obtained for the adsorption of acetone on charcoal from an aqueous solution at 180C. Y (millimoles/g) C (millimoles/liter) 0.208 2.34 0.618 14.65 1.075 41.03 1.5 88.62 2.08 177.69 2.88 268.97 a) Find the constants k and n of the Freundlich equation. b) Find the constants a and b in the Langmuir equation. c) Find the constants k and n in the Temkin isotherm. d) Which of the isotherm fit the data best?
