The following data are for the determination of lead in Gasoline: 5.4, 6.8, 6,5, 6.3 and 5.9. What is the true value at 90% confidence level. (t-table at 90% C.L = 2.132). Consider significant figures, O a. 6.2 ± 0.5 O b. 6.2 ± 0.59 O c. 6.1 ± 0.6 O d. 6.14 + 0.59

The following data are for the determination of lead in Gasoline: 5.4, 6.8, 6,5, 6.3 and 5.9. What is the true value at 90% confidence level. (t-table at 90% C.L = 2.132). Consider significant figures, O a. 6.2 ± 0.5 O b. 6.2 ± 0.59 O c. 6.1 ± 0.6 O d. 6.14 + 0.59

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.27QAP

See similar textbooks

Related questions

Q: 7. Calculate the Mn, Mw and D for a polymer mixture sample comprising 2 g of polymer molecules…

A: Please find the attachment.

Q: Determination of AHf of NH4CI(s) & AH soln AHf of NH4CI(s) using your values of AH neut AHf of…

A: Please note that dissolution is an endothermic process. So, ∆Hsol should be 8.68 kJ/mol ( a positive…

Q: Dr. Caras was characterizing a cytochrome (an iron containing protein) from a new strain of…

A: First calculate mean (μ) of 8 measurements. Sum of all measurements = 2.5719 Mean of all…

Q: es of CO₂ = (Mass of CO₂) ÷ (Molar Mass of CO₂) 0.781/44.01 = ar Volume = VSTP + Moles of CO₂ ent…

A: I think you have solved some of them correctly but mostly are wrong due to a minor mistake. Here, I…

Q: The 95 % confidence limit for Zn in certain water sample is 2.90± 0.25 mg/L. Circle the correct…

Q: The true mass m can be calculated from the observed mass, m'. d. 1- d, m = m' d a Where: da is the…

A: Given reaction of CaC2O4 with KMnO4: C2O42- + MnO4- + H+ → CO2 + Mn2+ + H2O

Q: Which of the following correlation coefficients indicates the strongest relationship between…

A: The value of correlation coefficients ranges from -1 to +1 . the strongest relationship between the…

Q: Data from M. J. Samide, J. Chem. Ed. 2004, 81, 1641. (a) Do the volumes delivered by student 1 from…

A: a. First calculate the volumes delivered by student 1 from burette. Mean volume (V¯) = 10.01 ml No.…

Q: Determine the percentage error and the concentration of the prepared NAOH given the following data.…

A: Given: NNaOH true = 0.045 N And the experiment data is,

Q: . A student performed four trials to determine the molar mass of butane in Gas Laws lab. The average…

Q: Determine the percentage error and the concentration of the prepared NaOH given the following data.…

A: Given data - NNaOHtrue = 0.045N Weight of KHP = 0.2503g For trial -1Vf NaOH= 25mlVi NaOH = 0mlFor…

Q: The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O:…

A: Ammonia reacts with oxygen to form nitrogen dioxide and water. The equation for the balanced…

Q: 5. Consider the following sets of replicate measurements: *A в *C D "E F 0.514 0.503 0.486 2.7 70.24…

Q: Value of (5) is equal ат JP/V ат aP/V ӘР ( ат у ӘР as V to....

Q: 1. Which of the following is NOT a true representation of the Lineweaver-Burk equation? Group of…

A: Since we only answer one question at a time, we’ll answer the first one. Please resubmit the…

Q: Given the following data, calculate the 95% confidence interval. 0.452 0.453 0.448 0.456…

A: Given , Average = 0.4534 Standard deviation = 0.003847

Q: 7. What effect will a 1.0°C error (all temperature readings are 1.0°C greater than the actual value)…

A: If regarding 1°C greater than the actual value for the final temperature ΔT will be greater than the…

Q: The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O: 4 NH3 (g) + 7 02 (g)…

Q: An analysis of city drinking water for total hardness was done by two students in the laboratory and…

A: We are given data : For student A: 228.3, 226.4, 226.9, 227.1, and 228.6. And For student B:…

Q: 4. Use the information below to calculate Sº 3 PbBr2(s) Pb²+ (aq) + 2 Br(aq) Substance AHºf (kJ/mol)…

A: From thermodynamics , we have ∆G° = ∆H° - T∆S° So to calculate S° of PbBr2 (s) , we need ∆S° . To…

Q: Mercury analysis results performed on a drinking water sample are given in the table below. Analysis…

A: The average of the given data, x = 54.1+55.5+63.8+54.4+55.8+57.96= 56.9 The value of average with 90…

Q: The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O:…

Q: Trial 1 Trial 2 Trial 3 Mass of solution 29.824 g 29.855 g 29.816 g Volume of solution 25.00…

A: The relative average deviation (RAD) of a data set is defined as a percentage that shows the…

Q: How do I solve number 11?

A: The density of the substance can be described as the mass of the substance per unit volume. The…

Q: The combustion of ammonia in the presence of excess oxygen yields NO2 and H20: 4 NH3 (g) + 7 02 (g)…

Q: The combustion of ammonia in the presence of excess oxygen yields NO2 and H20: 4 NH3 (9) + 7 02…

A: ★ Answer : The combustion 263 grams of ammonia consumes 864 grams of oxygen. ★Solution :…

Q: How many sig figs should the result of the following have? Xs are digits that are purposefully not…

A: In the question 1. we have to determine the significant figure from the given equation which has…

Q: Which of the following would be a correct interpretation of a 99% confidence interval such as…

A: To determine the critical values for the confidence interval for the standard deviation from the…

Q: Identify the effect of the condition on the indicated parameter. Write increase, decrease, or no…

A: Here,we are measuring heat of reaction by reacting reactants with nitric acid.

Q: Suppose that two students perform a gas law experiment multiple times, resulting in the average PV…

A: Given, Student A=1.19×106±350000 Pa-mL Student B=1.2×106±22000 Pa-mL

Q: What is the 95% confidence interval for the mean of the data, assuming

A: (χi - μ) (χi - μ)2 1 3.55 0.10 0.010678 2 3.65 0.20 0.041344 3 3.14 -0.31 0.094044 Mean…

Q: 9) The following results were obtained in the determination of Vitamin E mass in tablet samples.…

Q: Given the below [S] and V determine Km, Kcat and Vmax (E] =3.8e M. Attach spreadsheet. [S] V 1.25…

A: It is example of enzyme kinetics we are required to determine Vmax ,Km, Kcat for the given data

Q: 7-6. The last result in each set of data in Problem 7-4 may be an outlier. Apply Q test (95%…

A: By applying Q-test we can easily find whether the data point in question is an outlier or not. If…

Q: Q1: The table below shows the Oxygen purity and Hydrocarbon levels observed in five tests performed…

Q: An analyst analyse two cans of beer each 5 times to determine the ethanol contents. The first can…

A: By applying t-test for comparison of the means of two samples: ±t = [(x1 - x2)/Sp] × √(N1N2/(N1 +…

Q: In the distillation of the mixture of acetic acid (MW=60.05 g/mole; d=1.05g/ml) and water (MW= 18.00…

A: Density of acetic acid = 1.05 g/ml Density of water = 1.00 gm/ml Molarity of NaOH = 1.00 M Volume…

Q: q (joules) AH (ki/mol) RUN REAGENT MASS/VOLUME TI It AT 24.82°C 0.1100 g 100 ml 19.20°C Mg HCI…

A: Mass = Volume × Density Amount of Charge (q) = Mass × Specific heat capacity × temperature change…

Q: A mixture of Al2O3(s) and CuO(s) weighing 18.371 mg was heated under H2(g) at 1 0008C to give 17.462…

Q: The percentage of an additive in gasoline was measured six times with the following results: 0.13;…

A: The expression for the confidence interval is shown below: Confidence interval =μ±t×σN where; μ =…

Q: 2. As the director of a research laboratory you are paid to decide if there is a significant…

A: Given: Hence we have to find out whether there is any difference between two sets of data or not .…

Q: Certified Reference Material (CRM), GSS-5, is certified to contain 40.67 ± 3.33 mg/kg of Ni in soil.…

Q: Complete the following table: Subst. weighed Subst. sought Grav. Factor 1.AgCI NaCl 2.Baso, SO3…

A: The gravimetric factor is the ratio between the grams of a compound and the grams of a single…

Q: The contents of similar containers of sulfuric acid are 9.8, 10.2, 10.4, 9.8, 10.0, 10.2, and 9.6…

Q: 10) The following results were obtained in an analysis of iron content in an ore sample. The results…

Q: Temp °C Temp Kelvin Ka In(Ka) AG'=-RTIN(Ka) 22.1 295.25 0 o044521 -1.12 18950.34962 35 308 .1Sk -901…

A: The data given is,

Q: 3.A core sample is saturated with an oil (po = 35°API), gas and water. The initial weight of the…

Question

The following data are for the determination of lead in Gasoline: 5.4, 6.8, 6,5, 6.3 and 5.9. What is the true value
at 90% confidence level. (t-table at 90% C.L = 2.132). Consider significant figures,
а.
6.2 + 0.5
O b. 6.2 + 0.59
O c. 6.1 ± 0.6
O d. 6.14 + 0.59

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

What is the Molecular weight of a certain volatile liquid which is placed in 225 g flask which has total capacity volume of 252.17 mL. After the liquid was heated to 96.7 oC the gass volatilized and the weight of the flask measure 227.33g. What is the could be the MW of the volatile sample?
An analysis of city drinking water for total hardness was done by two students in the laboratory and produced the following results (in ppm CaCO3): Student A: 228.3, 226.4, 226.9, 227.1, and 228.6. Student B: 229.5, 226.1, 230.7, 223.8, and 227.5What is the 95% confidence interval for the mean?
What is ΔSsurr for a reaction at 28.6 °C with ΔHsys = 38.9 kJ mol-1 ? Express your answer in J mol-1 K-1 to at least two significant figures.
The following molarities were calculated from replicate standardization of a solution: 0.5021, 0.5015, 0.5035, 0.5007, 0.504, 0.5025, and 0.5008 M. Assuming no determinate errors, what is the upper limit of the 95% confidence interval?
A mixture of Al2O3(s) and CuO(s) weighing 18.371 mg was heated under H2(g) at 1 0008C to give 17.462 mg of Al2O3(s) 1 Cu(s). The other product is H2O(g). Find wt% Al2O3 in the original mixture.
An analyst obtained the following data for the percent compound Z in triplicates (n=3) of an insecticide preparation: 7.47, 6.98, and 7.27. Calculate the 90% confidence limit for the mean of the data assuming that only information about the precision of the method is the precision for the three data points.
Ammonia (considered to be ideal gas, 1 mole) initially at 25 oC and 1 bar pressure is heated at constant pressure until the volume has tripled.Use CP = 25.895 + 32.999 x 10^– 3 T – 30.46 x 10^– 7 T2 , J/mole-KCalculate: c) delta H d) delta U e) delta S show complete solution
Explain and show work step by step: 1. A mixture of Al2O3(s) and CuO(s) weighing 18.371 mg was heated under H2(g) in a thermogravimetric experiment. On reaching a temperature of 1000 °C, the mass was l7A62 mg and the final products were Al2O3(s), Cu(s), and H20(g). Find the weight percent of Al2O3(s)in the original solid mixture.
Chemistry The levels of an organic pollutant (P) in the groundwater at the perimeter of a plant were a cause for concern. A 10 mL sample of the water was taken and the pollutant was extracted with 95% efficiency using 25 mL of diethyl ether. GC was used to analyse the concentration of P in diethyl ether. A calibration curve was plotted for a series of standards of P which yielded the following results: Peak Area Toluene Conc. (µg/ml) 12,000 2.6 23,700 5.0 35,500 7.7 46,800 9.9 31,250 Sample Determine the concentration of P in ppb in the initial groundwater sample.
6. A nitrogen gas (MW = 28) occupies a volume of 5ft3 at 2550 lb/ft2 abs and 755oR. What are its specific volume and specific weight? (3 DECIMAL IN FINAL ANSWER PLS!!)
Measurement Trial #1 Trial #2 Trial #3 mass of water/calorimeter/lid 82.73g 82.02g 84.46g mass of empty calorimeter & lid: 8.12g 8.16g 8.18g Mass of Water 74.61g 73.86g 76.28g Tf of water (in calorimeter) 26.8c 26.1c 26.4c Ti of distilled water: 20.6c 20.4c 20.3c ΔT water 5.48c 5.7c 6.1c Determine the amount of heat transferred from the metal cylinder to the water in the calorimeter for each trial using the equation below. The change in temperature used for this calculation is the change in temperature of the water (ΔTwater). Show your work. Do not round your answers for these calculations. qwater = mwater ´ Cp of water ´ ΔT water
A titrimetric method for the determination of calcium in limestone was tested with the analysis of a NIST limestone containing 30.15% CaO. The mean of the four analyzes is 30.26% CaO with a standard deviation of 0.085%. From the data accumulated from many analyzes, s→ϭ=0.094% CaO was found.a) Do the data indicate the presence of systematic error at the 95% confidence level?b) When a value for ϭ is unknown, do the data show a systematic error at the 95% confidence level?