Calculate the distance moved by the compound in millimeters with the data given below (please provide your answer as a whole number): Width of TLC plate used: 43 mm Time of elution: 24 seconds Rf Value: 0.59 Length of TLC Plate used: 100 mm Distance moved by the mobile phase: 72 mm

Calculate the distance moved by the compound in millimeters with the data given below (please provide your answer as a whole number): Width of TLC plate used: 43 mm Time of elution: 24 seconds Rf Value: 0.59 Length of TLC Plate used: 100 mm Distance moved by the mobile phase: 72 mm

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter5: Errors In Chemical Analyses

Section: Chapter Questions

Problem 5.12QAP

See similar textbooks

Similar questions

The spectrophotometer is set at 600 nm. The absorbance of each cuvette is read. The data is shown below: Cuvette 1 is the clank Cuvette # ml albumin Absorbance 0. 0.2 .063 3 0.4 .163 4. 0.6 .187 0.8 .253 1.0 .289 Using this data, plot an Excel graph showing absorbance (y-axis) vs ml albumin (x-axis). Find the correlation coefficient (r). R2 > 0.99 = excellent data; r2 0.98-0.95 good data r2 0.94 -0.90 = fair data. How would you describe this data?- To find the relative sensitivity, for each of tubes 2-6 (neglect blank), perform the following operation absorbance (Lowry)/Absorbance (Biuret x 0.5 gram albumin (Biuret)/0.05 gram (Lowry) x 200 ml (Lowry)/100 mL (Biuret). This implifies to Relative sensitivity = 20 dilution factor x absorbance (Lowry)/Absorbance (Biuret). Report your relative sensitivity as an average of all 5 values.
Which is more accurate, a transfer pipet or a measuring pipet? How much is the uncertainty in microliters when you deliver (a) 10 !L or (b) 100 !L from a 100- !L adjustable micropipet?
Hydrocarbons in the cab of an automobile were measured during trips on the New Jersey Turnpike and trips through the Lincoln Tunnel connecting New York and New Jersey. The total concentrations ( ± standard deviation) of m- and p-xylene wereTurnpike: 31.4 ± 27.0 μg/m3 (32 measurements)Tunnel: 54.9 ± 29.8 μg/m3 (32 measurements)Do these results different at the 95% confidence level?
You measure 35 turtles' weights, and find they have a mean weight of 72 ounces. Assume the population standard deviation is 3.1 ounces. Based on this, construct a 99% confidence interval for the true population mean turtle weight. Give your answers as decimals, to two places ounces
In the Mountain Dew assay, the absorbances recorded for a 10.0 mg/L caffeine solution at 230 nm were 0.2842, 0.2847, 0.2850. The average absorbance and its standard deviation, to the correct number of statistical significant figures, is: Select one: a. 0.2846 (±0.0004) b. 0.2844 (±0.0001) c. 0.2850 (±0.0001) d. 0.2849 (±0.0002) e. 0.2846(±0.0007)
The pharmacist attempts to weigh 80mg of sodium carbonate on a balance having a sensitivity requirement of 4mg. Calculate the maximum potential error in terms of percentage.
2) What is the relative error in delivering a volume of 18.28 mL from a class A 25 mL buret? (Remember, burets require two readings to deliver a certain volume, pipets only require one reading!) NIST Tolerances for Volumetric Glassware, Class Aa Tolerances (mL) Capacity (mL) (Less Than and Including) Volumetric Flasks Transfer Pipets Burets 1000 +0.30 500 ±0.15 100 +0.08 ±0.08 +0.10 50 ±0.05 +0.05 +0.05 25 +0.03 +0.03 +0.03 10 +0.02 +0.02 +0.02 5 +0.02 +0.01 +0.01 2 +0.006 "Corning Pyrex glassware and Kimball KIMAX, Class A, conform to these tolerances.
G Unit 4 Test goformative.com/formatives/605a3bd6021bbe6342a71d44 OYouTube Maps 3 4 6. 7. 8. 10 11 12 13 14 15 16 17 18 19 20 21 9. Keyon and Jarred performed the following experiment: A piece of magnesium was placed on a watch glass; the watch glass and magnesium together weighed 2.00 g. They burned the magnesium and it produced bright light, smoke, heat and a white residue. They then weighed the white residue on the watch glass. Watch glass with residue weighed 2.25 g. From this information, they reached separate conclusions: 1 Keyon: The magnesium gained mass, but it was due to some type of problem with their measurements. Jerrod: The extra mass had to come from the oxygen in the air; burning something always means it combines with oxygen. Which student has the best explanation for the gain in weight and why? Keyon because the experiment should be done several times to make sure they are getting accurate measurements. Jerrod is correct because oxygen in the air added mass, by…
Amylum, commonly known as starch is a white powder with variable molecular formula due to the different number of repeating sugar units based on the plant that it is obtained from. A sample of amylum in the form of spherical beads was subjected to series of analyses to determine physicochemical properties in the quality control unit of a factory. From the results each bead is found to have a 4.5 mL volume and 1.47 g/mL density. 4 of the beads were placed in a reaction chamber combusted, as a result, 43.1 g CO2 and 14.7 g H2O were obtained. If the molecular weight of the amylum is 972.84 g/mol how many repeating units the starch molecule consist and what is the molecular formula of the starch? [Empirical Formula=CxHyOz, Repeating unit=n, Molecular Formula=( CxHyOz)*n= CnxHnyOnz]
Name: Lyna Nichols NetID: Imn 194 9. A 0.250 L sample of blood plasma was found to weigh 0.25625 kg. What is the density (in g mL-¹) of blood plasma? 1L =1000 mL 250mL 256259 1 kg = 1000g 2578-5.9 250 ml over bluorle noitampo rise to 11. Convert 843 nm to m. = Im | nm = 10-9 m 100,000,000 nm .. 10. Laboratories that perform blood tests can perform 14 individual tests from a single 100.0µL sample of blood. Assuming each test required the same volume of blood, what volume (in µL) of blood is needed per test? = 10025 $1.02gmL- 0.0056709 ✓ significant Figures leading zeros not significant. 843nm = mgg VML 843, 843mm x 10-9 4 significant Figures 4 digits with a decimar 43-08 8.43 x 10-7m 12. How many significant figures are in the following set of numbers? 0.0056709; 1.157×107; 2 1.157 x 107 x 10-9 m ont enimmets. ㅇ ㅋ m | AACST) 1.81 x 6 eara A: 1.02 I significant Figure. A: 7.143 IsrW A: 8.43 x 10-7 =1 A: 5, 4, 1
Dr. Caras was characterizing a cytochrome (an iron containing protein) from a new strain of bacteria. He obtained eight measurements of the percent iron in the protein: 0.3205%, 0.3202%, 0.3196%, 0.3198%, 0.3316%, 0.3197%, 0.3208%, and 0.3197%. Calculate the mean () and standard deviation (s) for these results. x = Use the Grubbs test to determine if one of these values is an outlier. What is the value of Gealeulated? Gcalculated = Should this potential outlier be rejected with 95% confidence? Critical values of G can be found in this table. The potential outlier should be kept. The potential outlier should be rejected.
Estimate the absolute deviation and the coefficient of variation for the results of the calculation below. Round off the result so that it contains only the significant digits. The numbers in parentheses are absolute standard deviations.