Q: Enter your answer in the provided box. Calculate the standard entropy change for the following react...
A:
Q: How much heat (kJ) is evolved when 4.50 g of Fe203 is reacted with excess carbon monoxide using the ...
A:
Q: look for at least three extraction methods for perfumery materials.
A: There are several methods which are used for extraction of the perfumery materials from different su...
Q: When (S)-2-bromopropanoic acid [(S)-CH;CHBFCO,H] reacts with concentrated sodium hydroxide, the prod...
A: When an electron-donating neighboring group is present, the rate of SN2 reaction increases and the c...
Q: A chemistry graduate student is given 450. mL of a 0.60M propanoic acid (HC,H,CO,) solution. Propano...
A:
Q: Glycerol gave a positive result to (acrolein test). When Benedict’s reagent was added to Sucrose + H...
A: Acrolein test is used for the detection of presence of glycerol or fat. Benedict test is used for th...
Q: A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains Du...
A: heat flows from out of the flask means heat given out by the reaction and that heat is taken by the ...
Q: Molarity : (The molar concentration of a solution of a solute species ) is the number of moles of th...
A: We have to tell whether the statement is true or false.
Q: How would the calculated molar concentration of the analyte be affected if the burette is rinsed wit...
A: Before starting any titration it is very important to rinsed the burette with the corresponding solu...
Q: le sure to answer all parts. he AG for the reaction IHg) + Ig(g) 2g) 2.60 k/mol at 25°C. la one expe...
A: H2(g) + I2(g) <==> 2HI (g) ∆Go = 2.60 kJ/mol T = 298 K
Q: How much heat is absorbed by liquid water that weighs 550 grams as it is heated from 25C to 95C?
A: Given, mass of water m= 550 g T1=25 ℃ T2=95℃ Cp for water = 4.184 J g-1℃-1 heat q=?
Q: Mercury(II) oxide decomposes to form mercury and oxygen, like this: 2 HgO(s)→2 Hg(1)+O,(g) At a cert...
A:
Q: Click in the answer box to activate the palette. Determine the empirical formula of a compound havin...
A:
Q: Methyl p-Nitrobenzoate
A: Methyl p-nitrobenzoate H1-nmr spectrum: Number of non-equivalent protons = 3 Number of signals i...
Q: i. 4-ethoxy-2-methyl-hex-1-ene j. 3-isopropoxy-butan-1-ol
A: Given, i) 4-ethoxy-2-methyl-hex-1-ene j) 3-isopropoxy-butan-1-ol
Q: The decomposition of XY is second order in XY and has a rate constant of 7.00×10−3 L mol−1 s−1 at a ...
A:
Q: 3. How many moles of NaOH would it take to neutralize 1 mol of HCI? How many moles of NaOH would it ...
A: The reaction between acid and base is known as neutralization reaction. The reaction of acid and bas...
Q: make
A: Given statement is true.
Q: Activity 2. Complete the table to prepare the given solutions with different concentrations: Mass So...
A: A. 5% by volume of 25 mL HNO3 solution
Q: parts. Calculate the molecular mass or formula mass (in amu) of each of the following substances: (a...
A: a) CH4 Atomic mass of C = 12 amu Atomic mass of H = 1 amu
Q: 8- Calculate the molar concentrations of the solute species in an aqueous solution that contains 285...
A:
Q: if the change in pH after addition of 1.0mL of 0.10N HCI is 0.09, what is the total buffer capacity ...
A: Given-> Volume of HCl = 1.0 ml Normality = 0.10 N Change in pH = 0.09 Volume of solution = 20 ml...
Q: For the ion given below: NO2- 1. Draw the Lewis Dot structure for the ion on a paper and write the...
A: Lewis structures of NO2-.
Q: What is the mass of 4.50 x 1022 Cu atoms? Multiple Choice O 747 x 102 amu O 747 x 1029 O 475 g O 63....
A:
Q: How many milliliiters of a 1.25 M HF are needed to make 150 mL of a 0.450 M hydrofluoric acid/fluori...
A:
Q: Which of the following is CORRECTLY matched? Select one: O a. Zn2* with Ka[Fe(CN)c]: white precipita...
A:
Q: Which of the following statements does NOT explain why KHP is a suitable primary standard in an acid...
A: KHP is a suitable primary standard in an acid-base titration. Here we have to find out the stateme...
Q: 12.61 The molar mass of benzoic acid (C,H,COOH) determined by measuring the freezing-point depressio...
A:
Q: When diborate (B2H6) reacts with oxygen to form boric acid (HBO2) and water, what mass of diborate w...
A: This question is related to stoichiometry which determines the quantitative relationship between rea...
Q: Describes the differences and similarities between solids, liquids and gases on a molecular level fo...
A: Solid - - > The substances which are having very high intermolecular forces between thier molecul...
Q: Give four major contributions of Jabir ibn Hayyan to the study of the central science
A: Jabir (known as Geber in western history) is generally known for his commitments to science. He unde...
Q: 1. By referring to figure below, determine whether the addition of 40.0 g of each of the following i...
A: The amount of solute present in 100 g of solvent is known as solubility. The solubility of a solute ...
Q: Describe the effects of cooling an exothermic reaction at equilibrium.
A: Given it's a exothermic reaction.
Q: what is the mass of calcium carbonate reacted?
A: Given, Mass of marble before reaction 3.0g Mass of marble after reaction 1.8g
Q: 2. What is the empirical formula for a compound containing 26.57% potassium, 35.36% chromium, and 38...
A: The empirical formula of a compound can be defined as the simplest whole number ratio of atoms pres...
Q: 1.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have...
A:
Q: Complete the table provided below for the nomenclature of alkanes. Structure IUPAC Name OH а. HO но,...
A:
Q: Be sure to answer all parts. Predict the sign of the entropy change for each of the following proces...
A:
Q: Draw the optical isomers of CH3-CHOH-CHOH-CH3. Indicate the absolute configuration of each chiral ce...
A:
Q: Draw the structure of the product/s in each of the following rea Provide your final answers in the s...
A:
Q: Н — N CI H
A:
Q: Be sure to answer all parts. Heating copper(II) oxide at 400°C does not produce any appreciable amou...
A:
Q: boron trifluoride: partial pressure: Your answer is incorrect. • Total pressure in tank: Your answer...
A:
Q: Increasing the temperature of the water by 5 °F would have a significant impact on cooking times. As...
A: Desired boiling point of water = 217 oF Volume of water/solution = 4 quarts The question requires to...
Q: 2. If a sample known to be about 17190 years old has 400 carbon-14 atoms, how many atoms were in the...
A: When organism died absorption of C-14 stops and starts diminishing. The radioactive decay follows fi...
Q: Methane burns and give off 192 Kcal/Mol, assuming 90% effeciency in heat transfer. what mass in KG o...
A: Answer: In the process of heating up ice, there will be three steps, 1. Heating of ice up to its me...
Q: Decide whether each molecule or polyatomic ion is polar or nonpolar. If the molecule or polyatomic i...
A:
Q: Balance the equation representing the reaction between iron(II) exide, FeO, and carbon monoside (CO)...
A: Answer: Balancing of a chemical reaction is based on the conservation of mass, according to which, n...
Q: Daniel '18) Will a precipitate form if 5.0 g of AgBr are added to 50.0 mL of 0.60 M HCI? r110) 4 bee...
A:
Q: A chemist measures the amount of chlorine gas produced during an experiment. She finds that 1.35 g o...
A: This question is related to stoichiometry which determines the quantitative relation between reactan...
Calculate the specific absorbance ratio (SAR), where A620 = 0.136 and A280 = 1.392. Enter your result with 3 decimal places.
Step by step
Solved in 2 steps
- Calculate the specific absorbance ratio (SAR), where A620 = 0.285 and A280 = 0.795. Enter your result with 3 decimal places.A calibration curve was created to determine the quantity of protein in a solution. The calibration curve has the form of a straight line with the equation A = 0.0182x + 0.007 where A is the corrected absorbance of the solution and x is quantity of protein in the solution in units of micrograms (µg). Determine the quantity of protein in a solution that has an absorbance of 0.344. A blank solution has an absorbance of 0.095. quantity of protein: µgThe equation of your standard curve of absorbance versus concentration (mM) is y = 1.245x + 0.0012. You put a solution of unknown concentration into the Spec20 and get an absorbance value of 0.227, which lies within the standards used to make the standard curve. What is the concentration of the unknown solution in mM?
- Calculate the specific absorbance ratio (SAR), where A620 = 0.166 and A280 = 0.557A 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.The glucose content of samples can be determined using Nelson’s test. The equation of the line for the standard curve prepared for varying concentrations of glucose is y = 3.0x + 0.2. Based on this information, determine the glucose concentration (in M) of a mango preserve having an absorbance reading of 0.891.
- 1.) Beer's Law can be used to find the concentration of a solution by measuring its absorbance. The law is given by ?=???A=ϵbC Where A is the absorbance, ?ϵ is the molar absorptivity, b is the pathlength of the light (the width of the sample cell), and C is the concentration of the solution. A student is analyzing a solution of a metal, and finds that the absorbance of the solution is 0.532. If ?=187 L⋅g−1⋅cm−1ϵ=187 L⋅g−1⋅cm−1 and ?=1 cmb=1 cm , what is the concentration of the metal in solution (in g/L)? * 352 * 2.84×10−32.84×10−3 * 2.84×10−22.84×10−2 * 96.8 2.) How many significant figures does the number 0.00358 have? Group of answer choices a.1 b.2 c.3 d.5 3.) A 10.00 mL solution of a certain food dye has a concentration of 1.47 g /L. What is the total mass of food dye in the solution? Report your answer with the correct number of significant figures.You have prepared several dilutions of a standard compound. You measure the absorbance of each solution at 340 nm using a 1 cm cuvette and your results are listed in the table below. Determine the concentration of an unknown sample with an absorbance of 0.085 at 340 nm. Concentration (uM) Absorbance at 340 nm 2. 0.009 4. 0.020 0.061 16 0.111 32 0.189The same water sample from the cave was subjected to an analysis to determine its nitrite concentration. Using a spectrophotometer, the following results were obtained for standard solutions of nitrite and for the unknown. Solution Absorbance at 550 nm 2.00 µM 0.065 6.00 µM 0.205 10.00 μΜ 0.338 14.00 μΜ 0.474 18.00 μΜ 0.598 Unknown 0.402 a. Draw a calibration curve base on the data from the standards. b. Find the slope and intercept of the curve. c. Determine the concentration of nitrite in the water sample.
- The spectroscopic data in the table is generated with five solutions of known concentration. Concentration (M) 0.0133 m= 0.0266 0.0532 0.106 0.213 Absorbance 0.1271 What is the intercept of the linear regression line? 0.08531 0.5388 1.069 Use a spreadsheet program, such as Microsoft Excel, to graph the data points and determine the equation of the best-fit line. 1.954 What is the slope of the linear regression line formed by these points? M-1From graphical analysis of a calibration plot, you generated the line y=2543.23x + 0.0034. Your sample had an Absorbance of 0.142. What is the concentration?A medical lab technician creates a standard solutions of percent hemoglobin in whole blood. The technician measures the absorbance of each solution at 520 nm and creates a standard curve of the absorbance versus percent hemoglobin in whole blood and finds the linear equation below, with an R2 of 0.9985. y=0.0523x+0.072 A patient sample has an absorbance of 0.915. Using the standard data curve data, calculate the percent hemoglobin in the sample