Chemistry

predict the retention order for the following combinations of mobile and stationary phases: a. a polar stationary phase/nonpolar mobile phase?
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true or false: as the nu,ber of attached oxgen atoms increases, the oxidation number of the central atom decreases.
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the empirical formula of a chemical substance is ch2. the molar mass of a molecule of the substance is 56.108 g/mol. what is the molecular formula of the chemical substance? (4 points) c3h4 c4h8 c2h4 c6h6
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during glycolysis and the citric acid cylce are passed from organic molecules to a molecule of that results in the formation of
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I will give brainly IF CORRECT. What describes an electrolyte?Question 1 options:Substances that prohibit electricity from traveling across a solventSubstance that gives out ions when dissolved in water, which are able to conduct electricityA chemical used to combust flames in a laboratory settingA type of current that is utilized to determine if there is a blockage anywhere in the system
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a solution contains 25.0 grams of caffeine, c8h10n4)2, in a total soltuion volume of .450 l. what is the concentration of caffeine in the solution
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write an equation showing how the mass of the substance sought can be derived from the mass of the weighed substance on the right.
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liquids are anisotropic because their properties are independent of the axis of testing. true or false
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Can someone help me with this? Only need someone to show me how to get the concentration of the first one or two? The wavelength is 530nm. Thanks!
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what occurs when a solution of na2so4 containing several drops of phenolphthalein is electrolyzed between pt electrodes?
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which of the following statements about activation energy is correct? group of answer choices it is the same for all reactions. no correct response. it is low for reactions that take place rapidly. it is the maximum energy a reacting molecule may possess.
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a 175.0 ml solution of 2.594 m strontium nitrate is mixed with 215.0 ml of a 3.162 m sodium fluoride solution. calculate the mass of the resulting strontium fluoride precipitate.
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A lab technician adds 0.20 mol of NaF to 1.00 L of 0.35 M cadmium nitrate, Cd(NO3)2. Which of the following statements is correct? Ksp=6.44 x 10^(-3) for CdF2. A) The presence of NaF will raise the solubility of Cd(NO3)2B) The solubility of cadmium fluoride is increased by the presence of additional fluoride ions.C) One must know Ksp for cadmium nitrate to make meaningful predictions on this system. D) Cadmium fluoride precipitates until the solution is saturated. E) The solution is unsaturated and no precipitate forms. stel et shnt nan ha added to 1.00 L of
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what is the total number of chain bonds in an average molecule calculate repeat unit molecular weight
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a student made a buffer using 0.750 moles of hcn and 0.250 moles of nacn dissolved into 2.00l of solution. a) what is the ph of the buffer? b) does this buffer have a higher capacity for additions of acid or additions of base? c) how much naoh can you add before the ph will change by 1 ph unit?
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Which is an example of a covalent molecule?a. CH4b. NaClc. CuSO4d. LiF
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As cocentration increases the vapor pressure does
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Universal waste shipments records must be retained for a minimum of three years
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a cholesterol sample is prepared using acetyl coa molecules in which both the methyl group and the carboxyl functional group of the acetyl are radiolabeled with 14c. in the cholesterol product, the 14c label would appear:
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PLEASE HELP AND FASTHeredity Lab ReportInstructions: In the Heredity lab, you investigated how hamsters inherit traits from their parents. Record your observations in the lab report below. You will submit your completed report.Name and Title:Include your name, instructor's name, date, and name of lab.Objective(s):In your own words, what was the purpose of this lab?Hypothesis:In this section, please include the if/then statements you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.Test One: If I breed a short fur, FF female with a short fur, Ff male, then I will expect to see (all short fur; some short and some long fur; all long fur) offspring.Test Two: If I breed a short fur, Ff female with a short fur, Ff male, then I will expect to see (all short fur; some short and some long fur; all long fur) offspring.Test Three: If I breed a long fur, ff female with a long fur, ff male, then I will expect to see (all short fur; some short and some long fur; all long fur) offspring.Procedure:The procedures are listed in your virtual lab. You do not need to repeat them here. Please be sure to identify the test variable (independent variable) and the outcome variable (dependent variable) for this investigation.Remember, the test variable is what is changing in this investigation. The outcome variable is what you are measuring in this investigation.Test variable (independent variable):Outcome variable (dependent variable):Data:Record the data from each trial in the data chart below. Be sure to fill in the chart completely.Test OneParent 1: FFParent 2: FfPhenotype ratio:________ :________short fur :long furTest TwoParent 1: FfParent 2: FfPhenotype ratio:________ :________short fur :long furTest ThreeParent 1: ffParent 2: ffPhenotype ratio:________ :________short fur :long furConclusion:Your conclusion will include a summary of the lab results and an interpretation of the results. Please write in complete sentences.Which genotype(s) and phenotype for fur length are dominant?Which genotype(s) and phenotype for fur length are recessive?If you have a hamster with short fur, what possible genotypes could the hamster have?If you have a hamster with long fur, what possible genotypes could the hamster have?Did your data support your hypotheses? Use evidence to support your answer for each test.Test One:Test Two:Test Three:Which hamsters are the parents of the mystery hamster? Include evidence to prove that they are the correct parents.
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fill in the blank. the___is the organelle that is formed when an endosome, containing hydrolytic enzymes necessary for the digestion of the materials, reaches a low ph of approximately 4.5.
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describe the major non-silicate minerals, including their general characteristics such as color, cleavage, and any diagnostic attributes.
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3. The program can potentiallyeven send drones to spray asubstance that can slow thespread of fire?
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The vaporization of from the liquid to the gas state requires 7.4 kcal/mol (31.0 kJ/mol).What is the sign of for this process? Write a reaction showing heat as a product or reactant.How many kilocalories are needed to vaporize 5.8 mol of How many kilojoules are needed to evaporate 82 g of
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