The absorbance of a 0.00004 M potassium thiocyanate solution, (KSCN), is measured as 0.632 in a 1.00 cm cell. What is the molar absorptivity, ε ? Report your answer with the correct number of significant figures in scientific notation (accepted format 1.23*10^3). Enter
Q: How many grams of potassium chloride are needed to prepare 3.500 liters of a 0.5000 M solution?
A: Since, Molarity is the number of moles of solute dissolve in one litre of the solution. Thus,
Q: A.Where are the curved arrow mechanisms locate? In each step, indicate the Lewis acid and Lewis base…
A: Given that, a reaction scheme is shown below We have to draw the curved arrow mechanism. Also, we…
Q: Calculate the enthalpy of combustion of methane at a temperature of 1500 K, if the standard enthalpy…
A: We know , ∆Cp = H2 - H1/T2 - T1
Q: When calculating enthalpy of reaction values, we use the "products minus reactants" mathematical…
A: The enthalpy of formation is the enthalpy change that occurs when one mole of a compound is formed…
Q: -6 At a particular temperature, K = 6.4 × 10 for the following balanced reaction: 2NO(g) + O2(g) →…
A:
Q: Write a K₂ expression for the reaction: H₂PO4 (ag) = 3H* 3- Pou (14) 3H+PO
A: Equilibrium constant (Kc) expression for the reaction:
Q: The specific rotation (s) carvone (at 20°C) is +61. A chemist prepared a mixture of (R) carvone and…
A:
Q: Which of the following statements is TRUE? O A scientific law is fact. Once a theory is constructed,…
A: A. A scientific law summarizes a series of related observation and is generally considered a fact.…
Q: Instructions: Give the structure of the follow 1. 4-methyl-1-cyclopentene 2. Methylcyclopentane 3.…
A: Detail explanation is given in step 2
Q: H3C, Нас CH3 CH3
A: Some basics that we must know about the chair confirmation. Cyclohexan is the most stable form as…
Q: Post-Lab Questions 1. Balance and classify the following reactions as a synthesis (SY),…
A: The given reaction is an example of Combustion reaction. A combustion reaction will always occur…
Q: Identify the alkene product in each of the following Wittig reaction: 1: Cyclohexyl methyl ketone+…
A: The given incomplete reaction is Identify the product of the following reaction
Q: The following graph shows the radioactive decay curve for lodine-131. This radioisotope is used in…
A:
Q: The gas phase decomposition of hydrogen peroxide at 400 °C H2O2(g)---> H2O(g)+ ½O2 (g) is second…
A: Given, H2O2(g) ----> H2O(g) + 1/2O2(g) The reaction is second order. Rate constant (k) = 0.650…
Q: products in this combustion reaction to determine the limiting reagent and the amount of the…
A: We will determine the limiting reagent and the amount of the reactant inexcess. Initial amounts of…
Q: Determine the [H3O+] of the eight buffer solutions made by mixing 1.10 M acetic acid and 0.900 M…
A: Buffer solution: Buffer Solution is a water solvent based solution which consists of a mixture…
Q: Common names for Ketones
A: Since, Common name are those name which is generally used to identify the chemical in the…
Q: What is the major product when 1-methylcyclohexene is reacted using the oxymercuration-…
A: The product formed from oxymercuration-demercuration follow Markovnikov rule. According to…
Q: Calculate the Rf value for each spot present in each lane? Show sample calculation. 2. How many…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…
Q: How many grams of Cl are in 27.3 g of CHCl3 ?
A: Given : Mass of CHCl3 = 27.3 gm Also, atomic mass of Cl = 35.5 gm
Q: -7 At a particular temperature, K = 2.3 × 107 for the following balanced reaction: 2SO3 (g) →…
A:
Q: Rank the effective nuclear charge Z* experienced by a valence electron in each of these atoms: atom…
A: To solve this problem we have to know about effective nuclear charges .
Q: 6. If the temperature of the equilibrium system above is decreased and the concentrations of the…
A: 6. If the reaction is exothermic, heat can be considered as a product. If the reaction is…
Q: A weak base has a base ionization constant, ?b�b, of 3.6×10−6.3.6×10−6. What is the pHpH of a 0.20…
A: We will, first calculate the equilibrium concentration of OH- from Kb and then we will calculate…
Q: The following data were obtained for repetitive mass measurements of 1.004-g standard mass on a…
A: Given, Standard mass= 1.004-g Set of data points, x= 1.002, 1.000, 0.997, 1.004, 1.003, 1.001,…
Q: What is the pH at the half-stoichiometric point for the titration of 0.22 M HNO₂(aq) with 0.1 M…
A:
Q: Consider this reaction and the following data table for this reaction 2N 2O 5 -->4NO 2+ O 2…
A: The question is premised on the concept of chemical kinetics. we need to calculate average rate of…
Q: When a 6.00 g sample of KSCN is dissolved in water in a calorimeter that has a total heat capacity…
A: Given a 6.00 g sample of KSCN is dissolved in water in a calorimeter that has a total heat capacity…
Q: A buffer solution was prepared by dissolving 0.04 mol Na2HPO4(s) and 0.02 mol NaH2PO4(s) in water…
A: In this buffer solution, the buffering molecules are the conjugate acid-base pair of NaH2PO4 and…
Q: (3). Write a balanced chemical equation for each of the following reactions: a. Iron + oxygen gas…
A: Given :- a. Iron + oxygen gas ------- iron (III) oxide b. Sulfuric acid + aluminum hydroxide…
Q: At a particular temperature, K = 5.1 x 10-6 for the following balanced reaction: 2NO(g) + O₂(g) →…
A: At a particular temperature, K = 5.1 x 10-6 for the following balanced reaction: 2NO(g) + O2(g) →…
Q: What is the product of the following reaction sequence? „lza H EtOH 1) xs CH3MgBr 2) H3O+ [TSOH]…
A: The question is based on organic reactions. we need to identify the product formed in the given…
Q: A technician in a nuclear laboratory was accidentally exposed to 5 mGy of radiation. How much was…
A: To convert from milligray (mGy) to rad, you need to multiply the value in mGy by 0.1. conversion…
Q: The condensed cell diagram for the reaction occurring in silver–zinc button batteries is (-) Zn(s)…
A: The cell diagram for the reaction is (-) Zn(s) | ZnO(s) | KOH(aq) || Ag2O(s) | Ag(s) (+) The…
Q: ndicate the position of the substituents in the more stable chair conformation of…
A: Stable conformation in cyclohexane system is the one which exhibit less 1,3 diaxial interaction.
Q: Predict the missing product of this organic reaction: OH H' P + H₂O Specifically, in the drawing…
A:
Q: what is the mechanism for this reaction
A:
Q: Consider three hypotheticals monodisperse polystyrene, with M=10,000, M= 100,000, and M=1,000,000.…
A: To calculate: weight average molecular weight (Mw) and number average molecular weight (Mn)
Q: A glucose solution is frequently used as an intravenous (IV) solution to supply hydration and/or…
A:
Q: 38°F Cloudy Two sets of ionizations are shown in the tables below. Complete the tables by ordering…
A: Ionisation energy is the amount of energy needed to remove electrons from outermost shell of…
Q: explain the effect of pka on the activity of quinolone
A: Quinolones are a class of antibiotics that are commonly used to treat bacterial infections. The…
Q: 23.0 mL of 0.150 M copper(II) sulfate reacts with 15.0 mL of 0.120 M sodium hydroxide to form a…
A: The balanced equation is CuSO4 (aq) + 2 NaOH (aq) ------> Cu(OH)2 (s) + Na2SO4 (aq) Number of…
Q: Rank the effective nuclear charge Z experienced by a valence electron in each of these atoms: atom…
A: We have to rank the given atoms on the basis of effective nuclear charge
Q: Some patterns of electron configuration are listed below. In each case, [G] stands for a noble-gas…
A: The question is based on periodic table. we need to identify the element from its configuration and…
Q: After 7.0 half-lives, how much P-32 will be left from an original sample of 225 grams? OA) 27 grams…
A:
Q: 4 5 warmth/ neat (d) Word Equation: Cloudy Precipitate/ d) Word Equation: Sodium Hydroxide +…
A: Given that, 4.Sodium hydroxide + hydrochloric acid (heat) 5.Barium chloride + Sulphuric acid(Claudy…
Q: using phenylithium and any necessary organic or inorganic reagents, suggest an efficinet sythesis of…
A: The question is based on the concept of organic reactions. We need to convert given reactant into…
Q: In a spacecraft, the carbon dioxide exhaled by astronauts can be removed by its reaction with…
A:
Q: LL F A D CH3 CH3 B E F CH3 CH3 C F CH3 CH3
A: If two high priority groups from two different carbons of alkene are on same side then the alkene is…
The absorbance of a 0.00004 M potassium thiocyanate solution, (KSCN), is measured as 0.632 in a 1.00 cm cell. What is the molar absorptivity, ε ?
Report your answer with the correct number of significant figures in scientific notation (accepted format 1.23*10^3). Enter numbers only; do not enter units.
![](/static/compass_v2/shared-icons/check-mark.png)
Step by step
Solved in 2 steps with 2 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
- An unknown cobalt (II) chloride solution is measured to have an absorbance of 0.356. Calculate the molarity of the unknown cobalt (II) chloride solution using a spectrophotometer with a path length of 1.00 cm.What are the qualitative and quantitative approaches to measure densities, respectively? In air, the mass of an piece of tiny evidence is five times as the mass when immersed in a saturated MgCl, solution (P = 1.34 g/cm³). What is the density of this evidence? What is the working principle of this measurement? Please show the formula and your calculation.A biochemist carefully measures the molarity of salt in 33.mL of photobacterium cell growth medium to be 54. mM . Unfortunately, a careless graduate student forgets to cover the container of growth medium and a substantial amount of the solvent evaporates. The volume of the cell growth medium falls to 9.1mL . Calculate the new molarity of salt in the photobacterium cell growth medium.Round each of your answers to 2 significant digits.
- To measure the blood Ca2+ concentration of a patient’s sample, 5.00 mL of blood was diluted to a total volume of 250.00 mL. A 10.00 mL portion of the diluted blood was further mixed with 40.00 mL of calcium dye solution and the final concentration of Ca2+ was determined to be 4.52 μM in the final solution. What’s the blood Ca2+ concentration for this patient? (Assume that volumes are additive)A group of students is doing an analysis of copper in a 1-peso coin. They were tasked to prepare standard solutions and weigh the analyte as the end-product of their experiment. Explain the type of error they are incurring in their experiment.The average concentration of dissolved gold in earth's oceans is 5.8 x 10^−9 g/L. of ocean water.How many micrograms of gold are in 1.1x10^3 m^3 of ocean water? (1 ml = 1 cm3)
- Calculate the solubility of copper(II) hydroxide (Ksp = 2.20 × 10-20) in pure water in grams per 100.0 mL of solution. Express your answer in grams per 100 milliliters of solution to three significant figures. ΑΣφ a ха |X| X•10" solubility = 1.76 • 10¯7 g per 100.0 mL of solution %D Submit Previous Answers Request Answer Incorrect; Try Again; 4 attempts remaining Express the equilibrium concentrations of the formed ions in terms of S (the number of moles per liter of Cu(OH), dissolved) and substitute them into the expression for Kan:The three sets of units for expressing density (or concentration, as in “mass of solute per unit volume of solvent”) below are equivalent: kg⁄L = g⁄mL =g cm! ⁄a) Using dimensional analysis, show that the above expression is true.b) What is 1.0 kg⁄L = 1.0 g⁄mL = 1.0 g cm! ⁄ expressed in SI base units?Chemistry An analytical chemist weighs out 0.410g of an unknown triprotic acid into a 250mL volumetric flask and dilutes to the mark with distilled water. She then titrates this solution with 0.0700M NaOH solution. When the titration reaches the equivalence point, the chemist finds she has added 91.5mL of NaOH solution. Calculate the molar mass of the unknown acid. Round your answer to 3 significant digits.
- A chemistry student weighs out 0.157g of lactic acid HC3H5O3 into a 250.mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1800M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Be sure your answer has the correct number of significant digits.What is the concentration, in ppm, if 0.9081 grams of Calcium chloride isdissolved in 250.0 ml of water. Give your answer inppm. (MM= 110.97) Report your answer to 4 significant figures. Do not include the unit when writing your answer.An analytical chemist weighs out 0.111 g of an unknown diprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. He then titrates this solution with 0.1000 M NaOH solution. When the titration reaches the equivalence point, the chemist finds he has added 18.8 mL of NaOH solution. Calculate the molar mass of the unknown acid. Round your answer to 3 significant digits.
![Chemistry: The Molecular Science](https://www.bartleby.com/isbn_cover_images/9781285199047/9781285199047_smallCoverImage.gif)
![Chemistry: The Molecular Science](https://www.bartleby.com/isbn_cover_images/9781285199047/9781285199047_smallCoverImage.gif)