Calcium stearate (Ca(OOC(CH2)16CH3)2) is sometimes used as a lubricant in the processing of poly(vinyl chloride). A sample of PVC compound containing 2 wt% calcium stearate was found to have Mn = 25,000. What is Mn of the balance of the PVC compound? %3D
Q: A 25 mL liquid bleach sample is diluted with water to 1000 mL in a bubble gel. 25 mL of the diluted…
A: The balanced chemical reactions are as follows: I- + OCl- + H2O = I2 + Cl- + 2OH- 2 Na2S2O3 + I2 =…
Q: A water sample was analyzed for Fe content using the iron-phenanthroline method. The following data…
A:
Q: A stock solution of potassium permanganate (KMn04) was prepared by dissolving 13.0g KMn04 with DI in…
A: Record the given data, The given weight of KMnO4 = 13.0 gm The molecular weight of KMnO4 = 158 g/mol…
Q: 4 g 5 g 28 100 g R Lactic acid Salicylic acid Trichloroacetic acid Flexible collodion qs ad Sig:…
A: Given, Mass of lactic acid = 4 gm Mass of salicylic acid = 5 gm Mass of tri chloroacetic acid = 2 gm…
Q: If you have 6.76 g of caffeine dissolved in 57.2 mL of water and the extraction coefficient between…
A: Extraction is a technique by which a compound dissolved in a solvent is extracted into another…
Q: (2) j lubäi On the gravimetric determination of CI, if the weight of AgCl ppt. was 1.433 g.; the…
A: This method is used for the determination of the analyte based on its mass. The principle behind the…
Q: A fly ash aerosol of monodisperse particles with a density of 2.0 g/mL and particle diameter of 10.0…
A: Stokes' law is a formula for measuring the settling velocities of small spherical particles in a…
Q: A 0.1475-M solution of Ba(OH)2 was used to titrate the acetic acid (60.05 g/mol) in a dilute aqueous…
A: w/v percentage of acetic acid in each of the sample 1 to 4 are required to calculate the mean w/v…
Q: Consider a soil with bulk density of 1.34 g/cm3 soil. Sampling the top 7 inches of this soil and…
A:
Q: A scientist wishes to measure the concentration of methyl benzoate in a plant stream by gas…
A: We are given for peak A of methyl benzoate of 1.37 mg/ml gave an area of 301, and peak B of butyl…
Q: Soil sampled down to 1.8 m was mixed together then analyzed, and found to have 3.0 g C/kg on…
A:
Q: 2. Tungsten is commonly produced from wolframite ores consisting of 6% FeW04, 4.7% MnW04, 1.01 %…
A: The given process is the purification for the ore of the tungsten. The process is followed in many…
Q: 13. The presented scheme has flaws. What is/are the flaw/s? CH3 COOH 1. Cl2, FeCa 2. KMNO. CI
A: Since you have posted multiple questions, we are entitled to answer the first only.
Q: A sample of anhydrous Na2CO3 (FM = 105.989) is suspected to be contaminated with either NaHCO3 (FM =…
A: Given information: Mass of sample = 0.7483 g Volume of solution = 50.00 mL Normality of HCl = 0.0125…
Q: concentrated H2SO4 has the following composition specific gravity 1.84 and purity of H2SO4 is 97…
A: Calculation of concentration of the solution in molarity (mol/L) with known values of density,…
Q: To a 0.5 g sample of impure NaCl are added 0.784 g of pure AgNO3 (MW = 169.88) crystal. This is in…
A: A precipitation reaction involves the formation of a solid, insoluble substance. In Stoichiometry,…
Q: (a) Water in vadose zone contains chlorobenzene of concentration 40 mg/L. What is the equilibrium…
A: “Since there are multiple questions and it is not mentioned that which one has to be solved so I am…
Q: Countercurrent Multistage Washing of Ore. A treated ore containing inert solid gangue and copper…
A: No of stages x0 =120010,000 = 0.12R0 = 10,000 kg/hrv1 = 89.2= 0.0869 By center current…
Q: and in 4) To adjust the thiosulfate (S2O32) solution to be used as a titrant in the copper…
A:
Q: A chemist received different mixtures for analysis with the statement that they contained NaOH,…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…
Q: 100.0 cm3 of a 1.234 mol.dm-3 solution of nickel(II) nitrate was added to 150.0 cm3 of a 1.178…
A: Nickel Nitrate:- Ni(NO3)2 Sodium Carbonate:- Na2CO3 1cm3 = 1ml 1dm3 = 1L Limiting reagent:- It is…
Q: The peak integrations of a chromatogram resulting from a GC analysis of a mixture containing…
A: Area under the curve of GC is correspond to mass of that component.
Q: A 0.1475-M solution of Ba(OH)2 was used to titrate the acetic acid (60.05 g/mol) in a dilute aqueous…
A: In order to find the mean w/v percentage of acetic acid in the sample. we have to find the w/v…
Q: A three-component mixture containing AgCl, SiO2, and KBr was provided to you in the lab to isolate.…
A: Filtration is a separation technique which is used for the separation of an insoluble salt from a…
Q: A scientist wishes to measure the concentration of methyl benzoate in a plant stream by gas…
A: The given data are, 1. Priliminary run, Concentration of methyl benzoate, MMB1=1.37 mg/mL…
Q: Suppose you have a soil that is made up of 10% organic matter with CEC = 200 cmol/kg, 40% kaolinite…
A: Given: A soil with- 10% organic matter with CEC = 200 cmol/kg 40% kaolinite with CEC = 10 cmol/kg…
Q: The weight of 0.1012 g of magnesium sulphate consumed 14.5 mL of EDTA solution (0.05M). What is the…
A: Given data,Mass of Magnesium sulphate=0.1012gMolarity of EDTA=0.05MVolume of EDTA=14.5mL
Q: A brewed tea brand sample was subjected to solvent extraction to extract caffeine. The cup of tea…
A:
Q: (5) If 200 g of polymer A, 300 g of polymer B, 500 g polymer C, and 100 g of polymer D are mixed,…
A: Molecular mass of polymer is a most important parameter and directly related to the physical…
Q: Forty grams of powdered banana pulp was mixed with 80.00 mL of cold Tris-HCl extracting buffer to…
A: 1. The original concentration of standard solution is 2 mg/mL.
Q: Lactated Ringer’s/5% Dextrose solution contains: 6 g/L of Sodium Chloride (NaCl MW 58.5) 3.1 g/L of…
A: Each KCl forma 1 potassium ion, K+. Hence mEq/mL of potassium ion is the same as mEq/mL of KCl…
Q: A weight of 0.50 g was taken impure container containing sodium carbonate and bicarbonate. Dissolved…
A: In the carbonate composition analysis, the mixture containing unknown amounts of sodium carbonate…
Q: which of the four binary mobile phase compositions (mixing ratio 1: 1) shown below will have the…
A: The polar and non-polar compounds are: Non-polar - Pentane, toluene. Polar - Methanol, acetone,…
Q: Fill out the Flow Scheme below. Obtain your ternary mixture and follow the steps on p. 2. in CH,Cl2…
A: 3 compounds need to be extracted. Benzoic acid Ethyl – p - aminobenzoate Naphthalene in…
Q: Louie performed paper chromatography to identify which among the four available reference mixtures —…
A: Given: The distance travelled by the solvent from the origin is 79.0 mm. The distances (in cm)…
Q: Calculate the molar concentration of H3PO4 commercial reagent that is 86% (w/w) and has a specific…
A:
Q: 12.10-3. Countercurrent Multistage Washing of Ore. A treated ore containing inert solid gangue and…
A: Soln:- No, of stages :-X0=120010,000 = 0.12R0 = 10,000 kg/ hr.V1=89.2 = 0.0869By center current…
Q: In 10 g of a PVC sample (Mw = 100,000; Mn = 70,000), you add 20 g another PVC sample with Mw 60,000,…
A: Polymers are extended chains, and huge organic molecules that are produced from multiple shorter…
Q: The test tube used in the determination of the AHrxn for nitric acid was still wet with water. […
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: burned in pure 02 and the combustion gases collected in absorbent tubes. The tube used to trap CO2…
A: Ans. The conservation of mass requires that all the carbon in the organic compound must be in the…
Q: b) The thermogravimetric curve for calcium salicylate monohydrate (CAC14H1006-H2O) is shown below.…
A: Thermogravimetry is an analytical technique that is based on mass lost from the sample when it is…
Q: A empty evaporating dish weighs 30.56g. You place 20.0mL of an NaCl solution in the dish plus the…
A: Molarity is the number of moles of solute dissolved in per litre of solution. It is denoted by M.…
Q: A 10.0mL, sample of whisky was diluted to 5.00.0 mL, A 4:00ML aliquot of the dilute Sample was…
A: Given: Volume of Fe+2 = 19.6 mL Concentration of Fe+2 = 0.1250 M Volume of Cr2O7-2 = 50.0 mL…
Q: What is the literature value of the Ksp of Ca(OH)2 ? How far off from this value was your value(s)…
A: Ksp is defined as the solubility product and the general expression for solubility product is shown…
Q: In a reversed phase liquid chromatography separation, what trend in k’ (capacity factor), α…
A: The effect of solvent system on the capacity factor, selectivity and resolution in reverse phase…
Q: It was required to limit grain size during high temperature processing of copper sheet. and the…
A: We have find out the effects of solute and particles on high temperature grain growth.
Q: 4g 5 g 2 g 100 g 49." R Lactic acid Salicylic acid Trichloroacetic acid Flexible collodion qs ad…
A:
Q: If you have 6.61 g of caffeine dissolved in 72.3 mL of water and the extraction coefficient between…
A: The extraction coefficient can be described as the ratio of the concentration of the substance in…
Q: The Ksp of Mg(OH)2 is 5.61 x 10-12, If you tried to dissolve 24.0 mg of Mg(OH)2 in 250 mL of wąter…
A: I think your question is incorrect. It should be ask the amount of dissolved solid according to…
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 2 images
- The %purity of a powdered crude sample of Na2CO3 containing only inert impurities is to be determined by reacting 225.0 mg of the crude sample to 10.0 mL of 3.00 M HCl solution, and bubbling the resulting CO2(g) product in water that is at exactly 29 °C. After the reaction has completed, the level of the liquid inside the eudiometer rests 4.30 cm above the water level in the beaker. The graduation on the eudiometer indicates that the trapped gas is 44.37 mL. The experiment was done under a barometric pressure of 755.2 torr. a. How many moles of CO2 were collected? b. What is the percent purity of the sample? Round off to the nearest whole numberThe %purity of a powdered crude sample of Na2CO3 containing only inert impurities is to be determined by reacting 225.0 mg of the crude sample to 10.0 mL of 3.00 M HCl solution, and bubbling the resulting CO2(g) product in water that is at exactly 29 °C. After the reaction has completed, the level of the liquid inside the eudiometer rests 4.30 cm above the water level in the beaker. The graduation on the eudiometer indicates that the trapped gas is 44.37 mL. The experiment was done under a barometric pressure of 755.2 torr. What CASE does this experiment satisfy?The concentration of purified OXA-M290 is tested with a BCA assay. Serial dilutions of a bovine serum albumin (BSA) stock solution are prepared, then pipetted into a 96-well plate; each dilution of the BSA standard is tested in triplicate. Then, bicinchoninic acid and Cu2+ ions are added to all of the wells of the plate. After incubating the plate for 1 hour, a microplate reader is used to measure the absorbance of all of the wells in the plate at 560 nm. This generates the following data: BSA conc. (μg/mL), Replicate 1 Absorbance, Replicate 2 Absorbance, Replicate 3 Absorbance 40, 1.360, 1.403, 1.481 20, 0.750, 0.745, 0.810 10, 0.380, 0.344, 0.398 5, 0.198, 0.160, 0.183 2.5, 0.090, 0.100, 0.085 1.25, 0.038, 0.043, 0.051 0.625, 0.024, 0.028, 0.019 Prepare a calibration curve using these data. You can use Excel, R, SPSS or an equivalent graphing software. In this graph, plot absorbance (y-axis) against the concentration of the protein standard (x-axis). Calculate and plot…
- The % purity of a powdered crude sample of Na^2CO^3 containing only inert impurities is to be determined by reacting 225.0 mg of the crude sample to 10.0 mL of 3.00 M HCl solution, and bubbling the resulting CO2(g) product in water that is at exactly 29 °C. After the reaction has completed, the level of the liquid inside the eudiometer rests 4.30 cm above the water level in the beaker. The graduation on the eudiometer indicates that the trapped gas is 44.37 mL. The experiment was done under a barometric pressure of 755.2 torr. Write the balanced chemical equation of the reaction in your solutions sheet. What is the sum of all the coefficients of the balanced chemical equation? Determine the pressure of the trapped gas inside the eudiometer in mmHg. Determine the partial pressure of the collected CO^2 in mm Hg. How many millimoles of CO^2 was collected? What is the % purity of the sample to the nearest whole number?The % purity of a powdered crude sample of Na^2CO^3 containing only inert impurities is to be determined by reacting 225.0 mg of the crude sample to 10.0 mL of 3.00 M HCl solution, and bubbling the resulting CO2(g) product in water that is at exactly 29 °C. After the reaction has completed, the level of the liquid inside the eudiometer rests 4.30 cm above the water level in the beaker. The graduation on the eudiometer indicates that the trapped gas is 44.37 mL. The experiment was done under a barometric pressure of 755.2 torr. What is the % purity of the sample to the nearest whole number?Suppose you have a soil that is made up of 10% organic matter with CEC = 200 cmol/kg, 40% kaolinitewith CEC = 10 cmol/kg, and 50% vermiculite with CEC = 100 cmol/kg.1- Calculate the overall CEC of the soil by taking a weighted average of the three soil components.2- What percentage of the overall CEC is contributed by the organic matter? How does that numbercompare to the 10% of the soil itself that is organic?
- A 100 g soil containing 20% smectitie mineral matter was mixed with 150 mL solution containing 0.10 M Pb. CEC of pure smectitie is 110 emol(+)/kg. CEC of the soil (cmol(+)/kg) is:A second spectrophotometric method for the quantitative analysis of Pb2+ in blood yields an Ssamp of 0.712 for a 5.00 mL sample of blood. After spiking the blood sample with 5.00 μL of a 1560 ppb Pb2+ external standard, an Sspike of 1.546 is measured. What is the concentration of Pb2+ in the original sample of blood?A 0.1475-M solution of Ba(OH)2 was used to titrate the acetic acid (60.05 g/mol) in a dilute aqueous solution. The following results were obtained. (See attached image)(a) Calculate the mean w/v percentage of acetic acid in the sample.(b) Calculate the standard deviation for the results. (Take note if n-1 should be used)(c) Calculate the 90% confidence interval for the mean.(d) (d) At the 90% confidence level, could any of the results be discarded?
- A stock solution of potassium permanganate (KMn04) was prepared by dissolving 13.0g KMn04 with DI in a 100ml volumetric flask and diluting to the calibration mark. Determine the molarity of the solution.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.10.5mL (mw 106) of benzaldehyde and 2.9g(3.63mL, mw 40) of acetone react with 5g of NaOH and 25mL of Ethanol to form 6.7g of Dibenzalacetone. What is the theoretical, actual and percent yield?