Lab Report 02 - Russell

Unit 3-Two slides 11. Create a question that involves your compound and the formula m= n.M. Solve the question and show all of your work. wwwww 12. Create a question that involves your compound and the formula n = N/NA. Solve the question and show all of your work. TE

Methods of Analysis Test #1: Polarity, or Effect of a charged rod on a stream of liquid: This test was used to determine the relative polarity of the unknown liquid. The liquid was allowed to run out of a buret and a charged rod was brought up next to the stream. The observations were reported as to whether or not the stream of liquid responded to the charged rod and to what degree. Try this at home with water and a plastic spoon. Rub the plastic spoon against a sweater and move it close to a small stream of water running out of your faucet! Test #2: Volatility, or Rate of Evaporation: A thermometer probe was wrapped with a strip of filter paper. This assembly was soaked in one of the liquids for one minute. The probe was removed, and the temperature change was monitored as the liquid evaporated. The results are given in Graph 1 below. (See Graph)   Graph 1: The curves generated of the change in temperature over time for the substances acetone, hydrogen monoxide, ethylene glycol,…

2. The goal behind suction filtration is to remove soluble impurities that are on the surface of the crystals. Therefore, why can't you simply use suction filtration instead of recrystallization to purify an impure solid?

Nanoparticle was synthesis from silver atoms with 1.8 nm of diameter. Find the ratio of the surface atoms of this particle.

use ion exchange method in analytical separation to separate mercury and nickel from polluted water using analytical steps and protocols.

+ terface/acellus_engine.htm?ClassID=1467683063 Use the data below to determine the mass ratio of iron to oxygen for compound 2. Compound 1 2 Et onal Academy of Science. All Rights Reserved. Mass Fe (grams) 15.55 20.98 [20:1 Enter the answer that belongs in the green box. Iron Ratio Cmpd 2 Mass O (grams) 4.45 9.02 Sh Enter

MIDTERM-EXAM (1) (Protected View) - Word À Dryan Zen File Home Insert Design Layout References Mailings Review View Help O Tell me what you want to do 요 Share A PROTECTED VIEW Be careful-files from the Internet can contain viruses. Unless you need to edit, it's safer to stay in Protected View. Enable Editing NAME: HO mstry Stepe H. Е. SHOW THE EXPANDED CONDENSED FORMULA: Page 2 of 2 105 words + 396% 10:50 AM O Type here to search 32°C Mostly sunny W 4/23/2022 出

What is a possible testable question (in correct format) That Mrs love might ask for this Sanrio?

When choosing unknown organic substances which are critric acid, acetone, urea, benzaldehyde, glycerol, and MTBE Write one or two paragraphs summarizing this experiment of properties of organic substances and see what results they got using the numerical data obtained and calculated to support the claims.

student found a bottle of unknown origin in the basement of an "CAUTION—contains С₁H₁O.” No other A old house. The bottle was labelled information was given, but inside the bottle were some white crystals. The student took the bottle to a chemistry laboratory, where she analyzed the crystals with the help of the laboratory staff. C₁2H₁6O reacted with Br₂ in CCl4 adding one mole of Br, and forming C₁₂H₁OB2₂. When a sample of C₁₂H₂O was reacted with O3 followed by Zn/H₂O, two different samples, J and K, were obtained. Compound J had a molecular formula of C.HgO₂, and its NMR is shown below. Compound K had a molecular formula of C₂H₂O, and it could be oxidized to compound L, with a molecular formula of C₂H₂O₂. The IR spectrum of L showed a very wide, strong band centred around 3000 cm*¹. The NMR spectrum of L showed only two different absorptions: a doublet (6H) at 0.9 ppm and a septet (1H) at 3.6 ppm. There was also a singlet (1H) off the scale at 11.8 ppm. students, deduce possible…

You were tasked to separate the components of a mixture containing silica, sodium chloride and charcoal. TNāCI dissolves in water while silica and charcoal are not water-soluble. Only charcoal dissolves in carbon disulfide. a. Write a short experimental procedure to carry out the separation of the mixture. b. Given the following data, determine the percentage of charcoal, sodium chloride and silica. Mass (g) Mass of beaker 100.000 Mass of beaker + mixture 110.000 mass of evaporating dish 62.000 mass of evaporating dish + solid after evaporation of water 65.000 Mass of beaker + charcoal + silica after evaporation of excess water 117.000 mass of beaker + silica after decanting dissolved charcoal and drying 113.545

To run a spectrophotometry experiment, begin by warming up the spectrophotometer and preparing the samples. Be sure to select the correct absorbance (X), then run a measurement on the sample solution. Follow up by running measurements on sample solutions. Once data is collected, turn off the instrument, clean the area, and discard the samples. Partially correct (2 of 4 correct)

Which one is the most common method used for the purification of liquid mixtures? Filtration Chromatography Evaporation Distillation

Calculate the percent error between your average experimental value and theoretical value for the mass percent of oxygen in KClO3. Show your work clearly.  TV = 39.165% EV = 40.767%

00 %2A # 3. 5o09 awww.awu.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-lijulplKKWv4bwenmyrLYoBHBAAsJtmzj53GErnx_viTdHblGMF9jvgkSu_nrizREmdQXHPJbMzqOmOrXJcuonZITOhB66q?1oBw7QYlbav. LEKS-Courtney Wh New Tab + x O CHEMICAL REACTIONS Percent yield of chemical reactions Courtney S0 OC Gaseous butane CH. reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (CO,) and gaseous water (H,0). If 2.32 g of water is produced from the reaction of 1.74 g of butane and 10.2 g of oxygen gas, calculate the percent yield of water. Be sure your answer has the correct number of significant digits in it. % 固 Explanation Check ©2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessibility 24 %23 2 4. 9. 5. 8. by k 4 69 C. alt 123

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°)

Please show all steps

II. b) What is the difference between liquid-liquid, solid-liquid and solid-phase extraction? Complete the table below and sort the following examples in the correct column: Steeping tea, washing an organic phase (workup), brewing beer, chemical desalting of crude oil, activated carbon sugar decolorization. liquid-liquid solid-liquid solid-phase Phase that contains analyte before extraction? Phase that contains analyte after extraction? Example(s)

What does a refractometer reading of 2 mean when distilling ethanol?

Explain your rationale for using the summative assessment (below) from the lesson plan on mixing substances in a 5th-grade classroom based on the below standard and learning objective, including how it aligns with the learning objective.  Summative Assessment  Summative: Components of the Lab Report Purpose: The student should clearly state the purpose of the experiment, which is to determine whether the mixing of two or more substances results in new substances. Procedure: The student should describe the steps they took to conduct the experiment. This includes the substances they chose to mix and the safety equipment they used. Observations: The student should record any observable changes that occurred when the substances were mixed. This could include a color change, the formation of a precipitate, or a change in temperature. Conclusion: The student should state whether a new substance was formed based on their observations. They should also reflect on their accuracy in…

1) Listen -5 The Ksp value for calcium sulfate [CaSO4] is 2.40 X 10 and a professor made 1825 mL of a CaSO4(ag) solution but then one of his graduate student accidentally poured in a 0.125 M solution of calcium phosphate [Cag(PO4)2] solution. You may ignore the additional volume coming from the Ca3(PO4)2 solution to make the calculation simpler. Calculate the new sulfate (SO42) ion concentration at equilibrium with this common ion effect. 6.40 x 10-5 5.25 x 10-5 6.21 x 10-5 5.44 x 10-5 201591..docx LAB EXP. #3 -..docx Show All

The composition of a binary material (having elements 1 and 2) can be expressed by using “weight percent” (wt.%) or “atomic percent” (at.%). Derive the formula for converting weight percent to atom percent.

What is calibration and why is it essential in relation to food analysis? Provide examples.

A pheromone is a type of volatile compound produced by a variety of insect species for chemical communication. These molecules can be used to signal alarm, to attract a mate, or to indicate the presence of food. The presence of 1.00 x 10-8 g of a pheromone can be sensed by another insect within a radius of 0.500 miles. Calculate the density of this pheromone. (1609 m = 1 mile) %3D Calculate the density (g/L) of the pheromone in this cylindrical air space.

H20, H2S H9SO4 CrO3, H2SO4 HO, РСС

I am struggling with finding tcalc, I know it is not 1.64

Can paper chromatographt be used to separate and identify very volatile substances? Explain.

Chromatography can be used as a means to purify a reaction product or to analyze a reaction mixture. Group of answer choices True False

TRUE OR FALSE: Volatile drugs are best protected with waxed paper. Carbon dioxide is released as a result of acid-base reaction. Vegetable parchment is a transparent waterproof paper. In cascade impaction, the particles are passed by mechanical shaking through a series of sieves. Bulk powders are dispensed in individual doses. When making powders there is a manufacturing expense in individual wrapping of powder doses Powders packed are usually not potent Granules are intended for use with potent drugs because of inherent error Bulkiness decrease with increase in particle size Low angle of repose poorly flow and has high bulk density