What is the purpose of using blank before measuring the absorbance of a substance?

Q: Diels-Alder Product CN CN CO₂Me CO₂Me

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Q: Question 18 of 41 What volume in liters of CH₂OH gas are formed when 3.20 L of H₂ gas are completely…

A: Given : 3.2 L H2

Q: [Review Topics] [References] Calculate the [OH] of each of the following solutions at 25°C. Identify…

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Q: Consider the thermochemcial equation for the combustion of acetone C3H6O in the equation:  C3H6O…

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Q: How many liters of water should be added to 305 mL of 12.7 M X to create a solution of 1.0 M X?

A: Given- Initial concentration= 12.7M Final concentration= 1.0M Initial volume= 305 mL

Q: How many moles of hydrogen atoms are there in 0.375 mole of C 2H 6?

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Q: Question 20 of 23 > Balance the chemical equation for the reaction of BaCl, and Na₂SO4. chemical…

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Q: for the eqilibrium below 2SO3(g) -> 2SO2(g) + O2(g)  Kc= 4.08 X 10-3 at 1000k calculate Kp

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Q: Draw the product of the E2 reaction shown below. Ignore any inorganic byproducts.

A: Elimination reaction of alkyl halide: Alkyl halide gives an elimination reaction by reacting with a…

Q: How many grams of 4 Al(s) + 3 0₂(g) → 2 Al₂O3(s) Step 1: Show the strategy for solving this problem.…

A: Aluminum reacts with oxygen to form aluminum oxide. The equation for the balanced chemical reaction…

Q: a. Which element has the largest atomic radius? ONa b. Which element has the largest electron…

A: we have to select the element with  largest atomic radius  largest electron affinity  largest…

Q: In the laboratory, a general chemistry student measured the pH of a 0.590 M aqueous solution of…

A: we have to calculate the value of Kb for methylamine

Q: ow many grams of boric acid are needed to prepare 500 mL of an isotonic boric acid eye wash?

A: Answer : E value of Boric acid  = 0.52 to prepare isotonic solution 0.9 % w/v NaCl equivalent…

Q: Which one of the following statements is not true? Group of answer choices   -A greenhouse gas is a…

A: Greenhouse gases absorb IR radiations. IR photons are  absorbed  only when the vibration in the…

Q: What is the pH of a solution which is 0.1396 M in C 5H 5NH 2 and 0.1345 M in C 5H 5NH 3Br?…

A: Note- Since the given question is a multiple question hence I solved first question according to…

Q: The solubility of Ni(OH)2 in water at 25 °C is measured to be 4.9 × 10-4. Use this information to…

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Q: An element X has a half-life of 5250 years. It’s originally found in a fossil and weighs 12g. How…

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Q: VIII. Please plan the following synthesis. Any reagents/solvents can be used CH3 CH3 -H CH₂CH3…

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Q: i + 요 CH3NH₂ NH3 CH room temp 1₂ HO J + K (h)

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Q: When 1 cal of heat is supplied to 1 g of water at 14.5 oC under constant atmospheric pressure, then…

A: Here we have to determine the  molar heat capacity of water if 1cal of heat is supplied to 1g of…

Q: Determine the equilibrium constant for the following and whether it is product or reactant favored…

A: The reaction is given as, 2A +B <--> 3C And the data given are, the concentration of A at…

Q: An aqueous solution at room temperature is 0.25 M in both Ba²⁺ and Ca²⁺ ions. You want to separate…

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Q: Ionic bonding is expected in which of these compounds?     KF     H2     OF2     Cl2     HF

A: The ionic bond is formed in the KF compund. The ionic compound is the compound in which the electron…

Q: Complete the structure of aspirin by removing the R substituent and drawing the correct functional…

A: To solve this problem we have to draw the structure of asprin .

Q: Draw the product of this reaction. Ignore inorganic byproducts. Br2 (2 equiv) Select to Draw

A: This is an example of addition reaction where 2 mole of Bromine adds to alkyne to form tetra bromo…

Q: b. Which involves the emission of more energy in the H atom, an electron moving from n=4 to n=1 or…

A: we have to determine the transition that emits more energy

Q: Predict the products of the following acid-base reaction.

A: Given : reactants Tip : to find conjugate base remove H+    To find conjugate acid add H+

Q: aqueous solution at room temperature is 0.25 M in both Ba²⁺ and Ca²⁺ ions. You want to separate…

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Q: A sample of air has a volume of 3.50 L at 1.00 atm. What is the volume of this air sample if the…

A: Given -->  V1 = 3.50 L  P1 = 1.00 atm  P2 = 86.04 atm  V2 = ? L  T1 and T2 = constant

Q: 6. Please provide the correct IUPAC names for the following compounds, including the correct…

A: Dear student, we are authorised to solve only one question at a time. Please post rest of the…

Q: Question 21 of 23 34.6 g Al x grams of Al2O3: 26.98 g Al 1 mole O₂ Answer Bank 1 mole Al 1 mole…

A: Moles = Mass/Molar mass  A balanced chemical equation contain equal number of atoms of each elements…

Q: The following are examples of what kind of isomers?

A: Given : compounds

Q: 1. Multipr 1. Which of the following alkyl halides is the second most reactive one in a SN2…

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Q: For a given electrolyte: Concentration = 0.01 M & g = 0.898 Concentration = 0.05 M & g = 0.800 What…

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Q: Using standard heats of formation, calculate the standard enthalpy change for the following…

A: The standard enthalpy change for the reaction is calculated as:…

Q: At high temperatures, iodine molecules can dissociate into iodine atoms. For the reaction I₂(g) ⇌ 2…

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Q: emains the same 38. Bi(s)|Bi2S3(s)| Bi2S3(aq)|Bi(s) has a standard cell potential of +0.96 V at 25…

A: In Bi22S3  Bi oxidation state is +3 So 6 electrons transferred during electrochemical reaction.

Q: Suppose you performed a similar experiment using an unknown carbonate sample. The pressure and…

A: The answer to the following question is-

Q: What are the properties of a solution to monitor the rate of reaction? What technique should be used…

A: The rate of a chemical reaction is defined as the measurement of the speed of the reactants to form…

Q: Consider the gaseous reaction at N2+3H 2 2NH 3 2.00 mole of N2 and 3.00 mole of react , H_{3} which…

A: Limiting reagents is a reagent that consumed first in chemical reactions

Q: ▼ Heliox, a breathing gas that is 79 percent He and 21 percent O₂ for patients who have difficulty…

A: We need to determine solute and solvent in all these parts.  In a solution, solute is that substance…

Q: 3. Atomic Orbitals. Which of the following arrangements of quantum numbers do not describe a…

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Q: Question 1 Write the structures of the organic products (A-K) in the following reactions. i Br CH,Br…

A: #(A): This is an example of cross Aldol condensation, where an aldehyde(Ph-CHO) and ketone (PhCOCH3)…

Q: O Molecula

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Q: 1A H2A Li Be 1B 2B 3A 4A 5A 6A 7A He BC N O F Ne Al Si P S Cl Ar Na Mg 3B 4B 5B 6B 7B8B K Ca Sc Ti V…

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Q: Neutron Proton Electron Type here to search O The model in the illustration repr The model in the…

A: Question 1 - Cation Question 2 -  +1 ( one positive) electric charge

Q: Review | Constants | Periodic Tall Among three bases, X, Y, and Z-, the strongest one is Y-, and the…

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Q: Draw the major product of this elimination. Consider regiochemistry and stereochemistry. Ignore…

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Q: Which of the following reactions will lead to the smallest temperature change in the calorimeter? A…

A: When acid reacts with a base, salt and water and heat energy. The smaller the amount of water formed…

Q: A 0.316 mol sample of nitrogen gas, N₂(g), is placed in a 4.00 L container at 315 K. What is the…

A: Value of gas constant (R) is.                       62.4 L torr/mol Kelvin