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?

Q: Block # 4 Mass 41 451g Length 3 32 Find density and percent error of the solid. Show work and circle…

A: Here we are making multiplication and division to solve for the answer.  According to the rule of…

Q: "Analytical data are never more reliable than the sampling technique". Explain this statement.

A: Answer- Analytical data is a collection of data that is used to support decision making and/or…

Q: · A few drops of blue food dye were added to water followed by a solution of bleach. (Initially, the…

A: Note - Since you have asked multiple questions, we are bound to do only the first question for you.…

Q: Determine the molar concentration of food dye in the sample

A: We are given absorbance of analyzed sample to be 0.349 we have to find molar concentration

Q: Convert 986 mm Hg to Pa.     9.99 x 107 Pa     1.01 x 103 Pa     7.49 x 105 Pa     1.30 Pa…

A: The method "unit conversion" contributes in changing the given standard unit from one unit form to…

Q: 18. Pa-mm = ? Pa m

A: A student sets up the following equation to convert a measurement. The missing part is to be filled-

Q: State whether the errors in (a)–(d) are random or systematic: a. A 25-mL transfer pipet consistently…

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Q: A stock solution of 0.225 +/- 0.003 M NaNO2 was transferred to a 100 mL volumetric flask (class A)…

A: Given that Concentration of stock NaNO2 solution = 0.225 ± 0.003 M When 7 mL of stock NaNO2 was…

Q: Read the length of the metal bar with the correct uncertainty error range (+/-). 5 10 15 20 cm

A: Length is measurement of anything from end to end.

Q: Shown is a thin-layer chromatography (TLC) plate. In this case, a student decided not to line up the…

A: The R f factor is called retention factor. The expression to find out R f factor in thin layer…

Q: The percent relative uncertainty of a buret reading of 24.35 ± 0.02 is: The choices are : A.…

A: Introduction: We have to calculate the uncertainty of a buret reading of 24.35 ± 0.02 .

Q: What is the absolute error of the answer for the following operation? (8.12 +- 0.03)-(3.12+-0.02) =…

A: The operation given is, =>

Q: You are trying to determine the caffeine content of brand X coffee using HPLC-UV/VIS analysis. You…

A: Mean is the average of the numbers, i.e., add up all the numbers, then divide by how manynumbers…

Q: A series of standards were analyzed which gave the following results SOLUTION % Transmittance  0 mL…

A: Beer-Lambert Law: The absorbance (A) is proportional to the concentration (c) of the solution and…

Q: cube welg pe. Caleu late the densite of a metal 0.4 98 Hg length of 4.21 cm in 3/mL. 1 mL = 1 cm²…

A: Given :  Mass = 0.498 kg  Length = 4.21 cm

Q: the VT of a column is 30 cm3 , and VS is 20 cm3 , and Vo is 7 mL, find Vi (in mL).

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Q: Determine the missing values. Express in 3 SF If the number is too big/small, Express the following…

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Q: 02 (9) + 2 H2O (1) + 4 Ag (s) → 4 OH¯(aq) + 4 AgT(aq) Express your answer using two significant…

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Q: What is the percentage error if tasked with weighing 120 mg of atropine sulfate on a class A…

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Q: 44.8 R Benzoin Tincture Peru Balsam Cold Cream Sig: cold sore ointment 18 ml 10 g 70 g If benzoin…

A:

Q: 1. Make sure you know how to obtain the highlighted results from the given information. Molar…

A: Hi, Since you have asked multiple questions (two tables), we will solve the first question for you.…

Q: Which of the following weights would you expect to be suitable for weighing on an ordinary bathroom…

A: Most bathroom scales use pounds (lb) to measure weight.Hence, we will convert each unit to pounds.…

Q: One of Dr. G’s CHEM 102 students is working part-time at a hardware store. A customer tells this…

A: There is a significant difference between the significant numbers and the exact number. In…

Q: 80 75 70 65 60 55 50 15 10- 5. 3000 2500 2000 1500 1000 4000 3500 %Transmittance 45 20 3618.11…

A: The question is based on the concept of IR Spectroscopy. we have been given the spectra. we have to…

Q: MİCRONS 5.5 2.5 100 26 27 28 2,9 3 3.5 4,5 11 12 13 90 70 50 40 30 20 1773 cm 10 3800 300 3400 3200…

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Q: At 36.0 °C the density of water is 0.9936870 g/cm3. At 37.0 °C the density of water is 0.9933390…

A: The given information is: Density of water (36.0 °C)= 0.9936870 g/cm3. Density of water (37.0 °C)=…

Q: Julie has been asked to measure the concentration of a sample solution using a spectrophotometer.…

A: On dilution, the no of moles does not change. As no of moles = Molarity × Volume Thus, (Molarity ×…

Q: What is the most positive characteristic of a Thermoluminescence dosimeter compared to film badges

A: The thermoluminescence dosimeter (TLD) involves the measurement of the ionizing radiation on…

Q: 3. A student weighed an unknown mass directly on an electronic balance of intermediate sensitivity,…

A: Weight of beaker + unknown = 59.121 gWeight of beaker = 30.346 gWeight of unknown = (59.121-30.346)…

Q: . A graduated cylinder with a least count of ± 0.5 ml is used in a density experiment. The initial…

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Q: In the determination of the concentration of chloride ion in water five experiments were done: 254.3…

A: Given,  Concentration of chloride ion in water five experiments were: 254.3 ppm, 254.7 ppm, 249.9…

Q: Measuring the proportional response of an analyte to things such as light or an electric current is…

A: Option A is correct answer.

Q: What should you write in your lab notebook if you measure 10 mL of a liquid as accurately as you can…

A: There are different types of glassware which are being used while performing any sort of experiment…

Q: Julie has been asked to measure the concentration of a sample solution using a spectrophotometer.…

A: Final concentration =5.5X10-5m Final volume =250 ml                              =250X 10-3 l{since…

Q: 3. Calculate the average deviation of the densities and comment on the precision of the…

A: The question is based on the concept of analytical chemistry. we have to calculate average deviation…

Q: The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the…

A: The volume of concentrated solution is 100.0µL Concentration of the diluted solution = 6.21×10-6 M…

Q: A metal cube having a mass of a112 kg is dropped into a graduated cylinder containing 0030 Laf…

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Q: 50.00 45.00 40.00- 36.00 30.00 3 25.00 20.00 15.00 10.00 5.00 MM CM 0.00 0.00 120 6.00 10.00 1 14.00…

A: Area of sorbitol peak is calculated in the following step.

Q: (a) Explain the difference between systematic and random errors. State whether the errors in (b)–(e)…

A: Error is the difference between the measured value and the true value. More the error in the…

Q: The following data were obtained in order to determine the density of cylindrical metal bar: Trial 1…

A:

Q: Indicate which of the following are determinate and indeterminate errors.

A: We have to classify given errors

Q: how can i round this Kc = qcalorimeter = 170.0cal = 36.95655217 cal/°C                 ∆T…

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Q: The level of mercury in fish is 0.040μg/mL (w/v), that is equivalent to   Group of answer choices…

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Q: The tolerance of a Class A 25 mL transfer pipet is +0.03 mL. A student uses an uncalibrated Class A…

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Q: A group of students have a 1000-mL beaker with graduation markings every 50 mL and a volume error of…

A: Measuring cylinder of 1000mL with graduation marking of 25mL should be used to accurately measure…

Q: the value of the proportionality constant?

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Q: The tolerance of a Class A 10 mL transfer pipet is +0.02 mL. A student uses an uncalibrated Class A…

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Q: The length of one pencil is measured with a ruler, the following measurements are obtained; 5.49…

A: Arranging the obtained length in arranging order we get: 3.28 , 5.34 , 5.38 , 5.41 , 5.49 Finding…

Q: What is the relative error in the determination of a density for which the accepted value is 0.945…

A: Relative error = |accepted value - experimental value|/accepted value

Q: attempt, she realizes that, to make the measurement, she must first dilute the sample solution.…

A: Solution- Final concentration =5.5X10-5m Final volume =250 ml =250X 10-3 l{since ml =10-3l}…