Lab 3 notes

In an experiment with an Ostwald Viscometer, the times of flow of water and toluene are 45 s and 32.9 s respectively at 30°C. The density of water is 1.002 g/cc. Calculate the density of the toluene in g/ml. (µwater = 0.8916 %3D cP, utoluene = 0.5239 cP) Use 4 decimal places. 0.8853 0.8053 O 0.8080 O 0.8882

Pls help me with number 6

Number 20 through 29 for dimensional analyis

The proton NMR spectrum of a compound, C3H6Cl2, has a pentet at d 2.19 and a triplet at & 3.72 with a 1:2 integration ratio, respectively. Which compound below best matches the data? A) CH₂CH₂CHC1₂ B) CICH₂CH₂CH₂C1 C) CH3CHCH₂C1 Cl C1 D) CH3CCH3 C1

Part A: Basic Laboratory Operations Density of a Solid TRIAL 1 TRIAL 2 Mass of solid (g) 19.761 g 19.763 g Volume of water (cm³) 75.0 cm^3 75.0 cm^3 Volume of water and solid (cm³) 78.0 cm^3 78.0 cm ^3 Volume of solid (cm³) 3.0 cm^3 3.0 cm^3 Density of solid (g/cm³) 7.0 g / cm^3 7.0 g / cm^3 Average density of solid (g/cm³) 7.0 g / cm^3 Identity of solid Zinc metal [Density = 7.133 g/cm^3] 1. Density of Zinc: Consider the data and results from the density of zinc determination. Now focus on the average absolute error associated with the calculated average density of zinc. Which measurement contributes the most relative error to this value? Given that measurement and its associated absolute error, is the calculated average absolute error reasonable and why? What aspect of the experiment limited the measurements the most?

Ba(NO,l(aq) + K,SOlaq) Baso(s) + 2 KNOlaq) Volume Volume Trial 0.10 M Ba(NO)2 (ml) 0.10 M K,SO, (ml) Mass Baso4 (s) Limiting Reagent 50. 20. 0.46 50. 40. 0.92 3 50. 50. 1.15 4 50. 60. 1.15 50. 80. 1.15 • Question 8 Use the data to identify the limiting reagent for each reaction performed. V Trail 1 a. Neither/Both EV Trial 2 b. Baso4 EV Trial 3 C. KSO4 EV Trial 4 d. Ba(NO3)2 EV Trial 5 e. KNO3 Question Help: Message instructor I Calculator Submit Question • Question 9 Why is the amount of precipitate in the Data Table above the same in Trials 3 through 5? Edit Insert Formats B IVX x' A

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77 K to FK = C + 273 C = 5/9 (F-32)

ent arch X Aktiv Chemistry ADD FACTOR x( ) 4.82 × 104 10¹2 A laser pulse is 4.82 x 10-2 milliseconds How many nanoseconds is this? 10-⁰ 4.82 x 10-8 10⁰ ns 10 º 4.82 × 10² X Question 30 of 31 4.82 x 10-14 ART ms PeopleSoft session expired 10-12 4.82 x 10-5 10⁰ ANSWER 4.82 x 1016 4.82 x 10-² 4.82 x 101⁰ min 1015 X ? Anthropology and Archaeolo X μs 10³ 4.82 × 10-11 RESET 5 10-3 P 1

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58 59 57 La 61 62 60 Nd 64 63 Eu 138.91132,91140.91132.91 (145) 150.36151.97 157.25158.93 162.50 164.93/167.26/168. 65 66 67 68 Er 65 Tr Ce Pr Pm Sm Gd Tb Dy Ho 90 Th 91 92 93 Np 95 89 Ac 94 97 96 Cm 98 Cf 100 101 Md 99 tton Pa Pu Am Bk Es Fm (227) 232.04231.04238.03 (237) | (244) (243) |(237) (247) (251) (252) | (257) (258 Hill List Question 49 pp tura Media Bromobutane (C4H,Br) reacts with ethyllithium (C,HgLi ) as follows: a Media CAH9BR + C2H5LI → C4H9LI + C2H5Br The sum of the coefficients of the reactants and products in the balanced equation having the simplest coefficients (whole number) is O 2 O 5 O 4 O 3 • Previous Type here to search 144H

Determine the volume of a sample of copper in (m³) with a mass of 2.2 x 105 tons and a density of 8.96 g/cm. (1 ton = 2205 lbs, 1 lb = 16 ounces, 1 kg = 2.20 lbs,1 kg = 1000g. 100 cm = 1m) %3D %3! %3D

Part c

Rsimi, Nour 2023VVA Chemistry.7b.FA1 An unknown solid substance is heated according to the temperature versus time graph below. Temperature (°C) 70 40 30 20 288 8 2 0 0 5 15 Time (min) 20 00 4 of 5 1 2 3 4 5 25 While the substance is a liquid, at what temperature do the molecules of the substance have the greatest average kinetic energy? 2 % 3 4 5 16 7 8 insert

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A districtims.seattleschools.org/common-assessment-delivery/start/4832899123?action3Donresume&submissionld%3D490555142 Element A Element D Element X Element Z Mixture 750 700 650 600 550 500 450 400 Wavelength (nm) Use the picture above to determine what is in the mixture. Choose all the elements that are present in the mixture. V Element A OElement D O Element X O Element Z 1. 2.

Chrome File Edit View History Bookmarks People Tab Window Help 74% Sat 2:20 PM Kayley Valentine OneLogin x O Microsoft Office Home Content New Tab AALEKS-Kayley Valentin x A www-awu.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNsikr7j8P3jH-IBI5ahvJxLWwcNXdqGDIniqicnbb-P2iXO0filILEyqsWt8DxNO... E Apps HPrechecks: Test 2. O MATTER Calculating mass density Try again. Kayley v A chemist v v as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of pentane, dimethyl sulfoxide, acetone, methyl acetate, and chloroform. The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information: liquid density 0.63 mL pentane db dimethyl sulfoxide 1.1 0.79 acetone 0.93 mL methyl acetate 1.5 chloroform 3 Next, the chemist measures the volume of the unknown liquid as 1797.…

S People Tab Window Help 14% O Sun 9:41 PN ngage Learning Online Asse x * MindTap - Cengage Learning evo/index.html?deploymentld%=55750828934189288909969212&elSBN=9781305657571&nbld%3D2199898&snapshotld... ☆ Tp INDTAP Q Search this cou Use the References to access important values if needed for this question. A sample of gas contains 0.1118 mol of H2(g) and 5.590×10² mol of O2(g) and occupies a volume of 8.55 L. The following reaction takes place: 2H2(g) + O2(g)–2H2O(g) Calculate the volume of the sample after the reaction takes place, assuming that the temperature and the pressure remain constant. Submit Answer 5 question attempts remaining

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Simplify. Write each answer in scie 17) (5.4x 10")는 (7X/0") 19) (6 x 10°(4 x 10-1) 21) (7.68 x 10:)는 (9x/0°)

show-all-working-explaining-detailly-each-step Answer should be typewritten using a computer keyboard.

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A typical HPLC column is 15.0 cm long and 4.6 mm in diameter. What is the internal volume of the column? What is the volume of a 5-μm diameter particle (approximate it as a hard sphere)? Because of the way spherical particles pack in a column, the volume that is external to the particles is approximately 40% of the entire column volume, meaning that 60% of the column volume is occupied by the particles. Given this, the total column volume you calculated in part (a), and the volume of a particle you calculated in part (b), calculate the number of particles packed in a 15.0 cm x 4.6 mm column

How many different ways can 4 identical items be put into 6 possible spaces? How about 4 identical items in 7 possible spaces? & lastly, 5 identical items in 8 possible spaces?

Student Information Chem159 - Practice 5 Compounds No. of Questions Work Time Liam A Fox (laf251) Practice 20 297:49:47 6 7 8 9. 10 11 12 13 14 15 16 17 18 19 20 (Not Answered) 45.3 g of magnesium sulfate heptahydrate is heated in an oven until all the water is driven off. What is the mass of the anhydrous compound?. 9.28 g 21.5 g 23.8 g 22.1 g (Correct answer) 23.2 g

Chrome File Edit View History Bookmarks Profiles Tab Window Help 98% Sat 11:31 PM O st. John's University - My App A ALEKS - Iffat Khan - Knowledg x G neon symbol Google Search A www-awn.aleks.com/alekscgi/x/lsl.exe/1o_u-IgNslkr7j8P3jH-lijkPWvZOZLqKt1FLIq7wcPWKzBYGfE9IMFjONgB2W4zIC7htjVN0a67HFZs7j2bW9r4zFmq7-Ctsi.. Updat Knowledge Check Question 4 Iffat v A chemistry student needs 10.0 mL of chloroform for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of chloroform is 1.48 g cm -3 Calculate the mass of chloroform the student should weigh out. Round your answer to 3 significant digits. dh g I Don't Know Submit Privacy I Accessibility O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use II

Student Discipline Problems The data for a random sample of 32 months for the number of discipline problems that occurred each month at a large high school are shown. Find the 99% confidence interval for the mean when σ 3. Round your answers to one decimal place. = 13 19 10 11 14 25 16 27 22 29 23 29 28 17 17 22 28 26 29 20 22 18 14 215 16 27 17 14 17 110 11 20 19 22 Send data to Excel We are 99% confident that the mean is between 15.1 and 17.8 discipline problems per month.

The photo fixer requires 1 quart of Part B to each 2 ½-galIon cube container of PartA chemistry. What is the ratio of Part A to Part B?

Data Sheet Extraction ODD EVEN ODD EVEN GROUP   Single Extraction 1 Single Extraction 2 Multiple Extraction 1 Multiple Extraction 2 Weight of tea leaves 10.002 (g) 10.123 (g) 10.013 (g) 10.007 (g) Weight of evaporating dish + caffeine 123.689 (g) 124.334 (g) 121.815 (g) 126.523 (g) Weight of empty evaporating dish 123.513 (g) 124.147 (g) 121.614 (g) 126.246 (g) Weight of caffeine         Identify the two layers in the procedure. In which part does caffeine can be extracted?

Answer question number 7 on the attached document

help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working