A 0.1% Methylene blue solution is needed for the detection AFB (Acid Fast Bacillus) in sputum smears. To prepare this, 1±0.03 grams of methylene blue is dissolved in a 1000±0.36 mL water. Determine the relative uncertainty of the solution. You will need to measure 30 mL of this solution using a pipette. You only have a Class B 10-mL pipette (±0.04mL) and a Class A 5- mL(±0.01mL) volumetric pipette. Is it more accurate to use the Class B pipette three times or the Class A pipette six times?
Q: The final four questions will require you to determine whether the compound in question will…
A: A zwitterion is a molecule that contains an equal number of positive and negatively charged…
Q: You are supplied with the following: NaCl (Mr = 58.443 g/mol) 2.5 M Tris-Cl, pH 8 oplossing /…
A: We are given the following data and we need to calculate how to prepare 500 ml of the digestion…
Q: 1. Many natural and/or industrial reactions require the correct conditions to produce the necessary…
A: The objective of the question is to understand the conditions necessary for different types of…
Q: DO NOT upload images of handwritten or typed solutions please.
A:
Q: 2. Devise a synthetic route to accomplish the following transformations. (These transformations may…
A: Step 1: Benzol attacks the acidic proton from the given compound to form an enol intermediate. Step…
Q: Using reaction free energy to predict equilibrium composition elld Consider the following…
A: Given only N2 and NH3 in a vessel and without H2, the only direction that the reaction will go to is…
Q: You The first five ionization energies of an element are as follows (in kJ/mol): 762.2, 1538,…
A: The objective of the question is to identify the element that has the given ionization energy…
Q: 50) involves titrating a 100.0 mL sample of 0.18 M HClO4 is titrated with 0.27 M NaOH. Determine the…
A:
Q: During an operation, the patient is given a mixture of gas containing oxygen (so the patient can…
A: The objective of the question is to understand the significance of Dalton’s Law of Partial Pressures…
Q: How many grams of oxygen gas must be in a 10.0 L container to exert a pressure of 97.0 kPa at a…
A: Given:- P = 97.0 kPa (1 atm = 101.325 kPa, so this needs to be converted to atm for use with the…
Q: What is the IUPAC name for the following alkane? M CHÍCH, CHÍCH CH3-CH-CH2-CH-CH3
A:
Q: I need help Identifying the unknown it was only soluble in ether. No Halides present and tested…
A: The objective of this question is to analyze spectroscopic data along with the molecular formula…
Q: Draw the product of this Robinson annulation reaction. Ignore inorganic byproducts. O + Q KOH,…
A:
Q: 5. What is the major product of the following reaction? A) (excess) OH H OH "00" B) C) D) 20 OH OH…
A: The reaction basically is protection of the ketone by cyclohexanol in presence of acid. The acid…
Q: Question 1 Give the IUPAC name for the following structures. To preview the image Click Here Br NO2…
A: Step 1:Names of these molecules are :- A) 2-bromo-1-ethyl-4-methylbenzeneB)…
Q: 3. Propose a mechanism for the following Aldol addition and beta elimination. 1) 1.1 equiv LDA, -78C…
A: Step 1:LDA is a base that abstracts a proton to give kinetic product i.e from less substituted side…
Q: For the structure CIO4 draw a Lewis structure using Cl as the central atom. For the structure that…
A:
Q: Compared my ao values for NH4Cl=4.143 angstrom and ao values for NaCl = 5.996 angstrom to the…
A: The objective of the question is to explain the reason for the difference in the values which was…
Q: 2. Fill in the boxes with the appropriate reagents to achieve the following additions or…
A:
Q: Draw the MO diagram for NiMe2(PMe3)3. Be sure to properly label everything!
A: has a trigonal bipyramidal shape with hybridasation
Q: A 0.075 M solution of a base has a pH of 11.40. What are the hydronium and hydroxide ion…
A: The objective of this question is to find the hydronium ion concentration [H3O+] and the hydroxide…
Q: 3. Spheres are packed more efficiently in Box B, because the spheres of different layers fit into…
A: The objective of the question is to determine the number of spheres that can be placed in the second…
Q: Draw the structure(s) of the major organic product(s) of the following reaction. 1. LiAlH4/dry Et₂O…
A: Thank you,Please rate my response.
Q: a. Composition of the eutectic mixture b. Consider a mixture with overall B composition of 0.57.…
A: The main aim of this question is to show that the Txy diagram is a graphical representation of the…
Q: FO & H H3O+ N + H₂O, heat H3N O
A: Approach to solving the question: Detailed explanation: Examples: Key references:
Q: Use the References to access important values if needed for this question. The following initial…
A:
Q: Online teaching and +…
A: Step 1: Step 2: Step 3:
Q: To preview image Click Here + Assuming the pi-systems in the following structures are flat, indicate…
A: thanks
Q: Super hero expert Hand written solution is not allowed
A:
Q: 5. A common solvent for diluting biochemical samples like the protein you are using in this lab is a…
A: The objective of the question is to understand why a buffered 0.05 Molar Tris solution buffered at…
Q: In an experiment, 0.10 M CO and 0.300 M H2 are reacted in the following reaction. CO + 3H2 -- CH4 +…
A:
Q: Give me fast expert answer solutions please
A: The exercise provided in your image asks to correct the molecular structures to reflect how they…
Q: Neurotransmitters are small molecules that are produced by the body to send messages from one neuron…
A: Step 1: Step 2: Step 3: Step 4:
Q: b. Using the following values to calculate net filtration pressure (NFP). Pc (arteriole-end) = 37…
A: The objective of the question is to calculate the net filtration pressure (NFP) using the given…
Q: 2. Give the final product Ph. Ph. aj phy Ph- Phi Phi P ph ph- Ph. Ph H bjphy Ph. H
A:
Q: Please answer in tipping format
A: 1) Benzene with Cl2 forms chlorobenzene.2) Treatment with SO3 in acidic medium attacks the para or…
Q: predicts prodtcts for rxn
A: #1 and #2 are Wittig reaction in which the ketones are converted into alkenes with the Wittig…
Q: On the molecule below, highlight primary halide carbons in red, secondary halide carbons in blue,…
A: Step 1:to identify primary, secondary, and tertiary halide carbons in a molecule. We need to…
Q: How many litres of hydrogen gas will be produced by the decomposition of 90 L of water? (Assume that…
A: Approach to solving the question: Analyze the balanced equation for reactant-product ratios, then…
Q: Using the spectroscopic data given, determine the structure of the unknown
A:
Q: Draw the product of this reaction. Ignore inorganic byproducts. HO H HO- ・H HO ・H HO ・H CH2OH H2 Pt…
A:
Q: Give the products of the reaction given below and state which reaction willproceed faster?
A:
Q: A buffer solution was prepared by adding 4.92 g of sodium acetate, NaCH3CO2, to 2.50 x 10^2 mL of…
A: The objective of this question is to calculate the pH of a buffer solution after adding a certain…
Q: What is the oxidation state of Fe in K3[Fe(CN)6 ]?
A: The central metal of this complex is Fe. Fe generally show +2 and +3 oxidation states.The complex is…
Q: Question 1 In carbon NMR, the carbon atom of the carbonyl group in aldehydes and ketones has a…
A: In carbon NMR spectroscopy, the chemical shift refers to the position of a carbon atom's resonance…
Q: None
A:
Q: None
A: Thank you.
Q: :$:$;;$;);$:$:$/:
A:
Q: d.) Calculate the molality of the Nace and MgCl2.6H2O solutions.
A: Mass of MgCl2.6H2O =3.6 gMass of NaCl = 1.5 gVolume of water = 25 mLDensity of water = 1 g/mLMolar…
Q: Current Attempt in Progress Propose an efficient synthesis for the following transformation: (c) →…
A: Step 1:Step 2: Step 3: Step 4:
Step by step
Solved in 2 steps
- Suppose that you used smaller volumetric apparatus to prepare 0.250 M NH3 solution by diluting 84.6 (±0.8) µL of 28.0 (±0.5) wt% NH3 up to 5.00 (±0.02) mL. Find the uncertainty in 0.250 M.Use the unknown to solve. Label the peaks.A solution of a dye was analyzed by spectrophotometry, and the following calibration data were collected using a 1 cm cuvette. *graph in attachemnt* Using the calibration data above for the dye solution, what is the dye concentration in a solution with an absorbance (A) = 0.52 if it was measured in a 1 cm cuvette? Group of answer choices 3.0 x 10-6 M 6.0 x 104 M 2.0 x 10-6 M Not enough information is provided.
- Quantitative Analysis by External Standard Method Calcium in a juice sample is determined by atomic absorption spectrophotometry. A stock solution of calcium is prepared by dissolving 1.834 g of CaCl, 2H20 in water and diluting to 1000.0 mL. A substock calcium solution was prepared by transferring 10.00 mL of the stock to a 100.00 mL volumetric flask and diluting to the mark. Three standard solutions of calcium were prepared by transferring 2.500 mL. 5.00 mL and 10.00 mL of substock to 50.00 mL volumetric flasks and diluting to the mark. The sample is prepared by transferring 1.000 mL of fruit juice from the original bottle to a 25.00 mL flask and diluting to the mark. Strontium chloride is added to all solutions before dilution to avoid phosphate interference. Instrumental response of the standards is measured against the blank, and the following readings are recorded: 9.10, 18.6 and 37.0. The sampie reading is 28.1. Using the multipoint method, find the concentration of calcium in…Solve both parts otherwise I will downvote ... Need solution asapAn unknown sample of Cu2+ gave an absorbance of 0.475 in an atomic absorption analysis. Then 5.00 mL of solution containing 75.0 ppm (= µg/mL) Cu2+ was mixed with 45.0 mL of unknown, and the mixture was diluted to 500.0 mL in a volumetric flask. a) Write an expression for the final concentration after dilution. b) Calculate the final concentration of the added standard. c) The absorbance of the new solution was 0.987. Find the initial concentration of Cu2+ in the unknown sample
- The validation process comprises four main steps that are : hardware validation, software validation, method validation and system suitability. To evaluate a spectrophotometer’s accuracy by measuring absorbance, a solution of 60.06 mg/L K2Cr2O7 in 0.0050M H2SO4 was carefully prepared together with a 0.0050 M H2SO4 as a reagent blank. If the spectrometer’s signal is properly calibrated, it has been reported that this solution should provide an absorbance of 0.640 +- 0.010 at wavelength 350 nm. Which one of the validations mentioned above had been involved in this process? Explain your choice3. The lead in a swab sample, lead standards, together with a blank were made up in 5.00 mL volumetric flasks using 0.2 % HNO3. 20 μL aliquots of these solutions were injected into the spectrophotometer and the absorbance measured at 217 nm. The following results were obtained. lead / ppb Absorbance 0 0.0591 10.00 0.0858 50.00 0.1926 100.0 0.3260 150.0 0.4594 200.0 0.5929 Swab sample 0.3700 (a) Determine the amount of lead in the swab sample in μg.I need hand written solution only
- = 1 5 Absorbance vs. Concentration y = 0.2755x 0.2- 0.1- 1.400 2.000 1.800 1.600 1.000 0.200 1.200 0.400 0.600 Concentration (M) Using the calibration curve, calculate the molar concentration for a solution with a measured absorbance of 0.374. Round your answer to 3 significant digits Concentration = M X Sub Absorbance 0.7- 0.6- 0.5 0.4- 0.800A student prepared four standard solutions of (NH4)2Fe(SO4)2 and measured their absorbance at 505 nm. She created a calibration plot with the best-fit line of y = 9372 x + 0.0539. She measured the absorbance of her diluted unknown sample solution as (4.69x10^-1) nm. If she prepared her diluted sample solution by diluting 10.00 mL of the original solution to a total volume of 50.00 mL with deionized water, what is the concentration of Fe2+ in her original solution? Answer in units of M. Note: Your answer is assumed to be reduced to the highest power possible.Can I have some help with this chart Calculate Absorbance from % Transmittance for each Standard and the Unknown Solution using A = - log T. • Calculate the concentration of each standard based on dilution using C1V1 = C2V2 .