List the steps required in gravimetry to prevent impurities in the final precipitate.

Q: Ph PHHC-PPH3

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Q: 3. Assign the absolute configuration to the stereocenters (marked A through G) below. Note: "extract...

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Q: Why is acetylcholine not commonly used as a drug? O It is not orally active O It is not selective fo...

A: Acetylcholine is essential for all voluntary movement .it rapidly inactivation , multiplicity in act...

Q: What is the pH after 0.150 mol of HCl is added to the buffer from Part A? Assume no volume change on...

A: When acid is added the concentration of HA increases and concentration of salt decreases. 

Q: How many grams of potassium permanganate are required to prepare 432 mL of 0.540 M solution

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Q: A solution is prepared by dissolving 10g sucrose, density=1.59g/mL, (C12H22)11) in 50g of water. The...

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Q: A. b. Now consider the two molecules A. and B. Note that A. is a dianion and B. is a neutral molecul...

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Q: A HCN – NaCN solution has a pOH of 8. The HCN concentration is 0.2F. Find the concentration of the N...

A: Consider the given information is as follows; pOH = 8 Ka of HCN = 4×10-10 Concentration of HCN = 0.2...

Q: Methane (CH4) burns according to the equation CH4 (g) + 2 O2(g) ➞ CO2(g) + 2 H2O(l) with the liberat...

A: Given :-  CH4 (g) + 2 O2(g) ➞ CO2(g) + 2 H2O(l)  Heat released = 990 kJ  To calculate :-  Amount of ...

Q: If 4.7 g of sodium carbonate reacts with calcium hydroxide, what is the mass of the precipitate?

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Q: How many grams of MnSO 4 can be prepared from the reaction of 15.0 g of KMNO 4 with 22.6 g of H 2SO ...

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Q: suggest the MIC for the unionised form of the acidic preservative with a pKa of 4.2 is 0.0185mg/mL. ...

A: Given that, the MIC for the unionized form of the acidic preservative with a pKa of 4.2 is 0.0185mg/...

Q: How many moles of cobalt (Co) atoms are there in 6.00 × 10° (6.00 billion) Co atoms? × 10 mol Enter ...

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Q: BH

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Q: Calculate the initial concentrations for all the solutions. The concentration of stock solutions are...

A: Concentrations of all solutions can be calculated using dilution law                                ...

Q: hat is the mass of 4.50 x 1022 Cu atoms? Multiple Choice 747 x 102 g 4.75 g

A: Molar mass Cu is 63.546

Q: 3. The Seliwanoff Test tests for ketoses by forming hydroxymethyl furfural (shown below) when heated...

A: The hydroxy groups at position- 2,3 and 4 are involved in dehydration reaction necessary to convert ...

Q: Clikk in the ansner box to activate the palette. Determine the ompirical formula of a compound havin...

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Q: Which of the following processes is exothermic, given the folowing N2ig) +202lg) - N2040) AH"=9.67 k...

A: An exothermic reaction is tha t reaction in which heat is released. 

Q: Which of the following represents 2-ethylbutanoyl chloride ? .C1 C1

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Q: 4.The elementary and irreversible reaction 2A B+C takes place in 50°C and the rate constant is 1 min...

A: Given elementary reaction is :  2A -----------> B + C  Rate constant = k = 1 min-1 M-1  Initial m...

Q: Do the following:  a. Circle and name the functional group b. Name the Hydrocarbon

A: IUPAC Rules : Identify the functional group Identify the longest carbon chain as parent chain.  Star...

Q: if ammonia is added with cupric oxide,how many moles of gas is produced from 6 moles of cupric oxide

A: Number of moles of cupric oxide = 6  Number of moles gas produced = ?   

Q: 2NaOH + H2SO4 ® Na2SO4 + 2H2O If you begin with 100 g of each reactant, how many moles of water will...

A: Number of moles is calculated by dividing the given mass with molecular mass.

Q: For the reaction, N2(g) + 2 O2(g) ➞ 2 NO2(g) , the enthalpy change is 33.9 kJ/mole of NO2 formed. Wh...

A: Enthalpy is a thermodynamic property which is an extensive additive property we are required to find...

Q: How is the term "organic" used among farmers and food stores today? Carbon's atomic number is six. W...

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Q: . Calculate the final pressure (in atm) if the temperature is changed to 54 degrees C at constant vo...

A: Using Gay-lussac law, At constant volume,  P1/T1 = P2/T2 1.4/294 = P2/327 P2 = 1.6 atm So, final pre...

Q: 6. Using the phase diagram in Question 5, determine the kilograms of beryllium that must be added to...

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Q: Enter your answer in the provided box. The reaction between nitric oxide (NO) and oxygen to form nit...

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Q: QUESTION: What is the total number of d electrons in a single (ground state) K atom?

A: Atom K = potassium  Atomic number of potassium = 19 Hence potassium has 19 electrons 

Q: What is the molarity of a HCl solution if 58.5 mL of the solution are required to react with 0.367 g...

A: Molarity is defined as number of moles of solute divide by volume of solution

Q: How much heat is required to raise the temperature of 15 x 10g of water from 45F to 130F? The specif...

A: Answer: This question is based on the following formula: Q=mS∆There:Q=heat exchangedm=mass of the wa...

Q: To wire your stere0 equipment, 325cm of speaker wire is needed, which sells for $0.15M. How much wil...

A: Length of speaker wire = 325 cm

Q: If the molar solubility of MnCO3 is 2.1l × 10-0 M at a certain temperature, what is the Kgp for the ...

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Q: Mercury and oxygen react to form mercury(II) oxide, like this: 2 Hg(1)+O2(g)–→2 HgO(s) At a certain ...

A: Kc is the ratio of  product of concentration of products raised to their stoichiometric coefficient ...

Q: Rank the following molecules in order of increasing acidity (least acidic to most acidic). Br HO. HO...

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Q: Earth’s atmosphere by volume. What is the partial pressure of argon  when the total pressure is 760 ...

A: Total pressure = 760 mm Hg Mole fraction of Argon = 0.0093  Partial pressure = mole fraction × Total...

Q: In nature, COT adopts a "tub-shape," as was shown in class. Assuming the molecule distorts to this n...

A: In the given problem we are required to predict whether the cyclooctatetraene is aromatic, non aroma...

Q: Draw the Lewus structure for the following atoms and assign the correct number of valence electrons ...

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Q: The pH of a sodium acetate-acetic acid buffer is 4.50. Calculate the ratio [CH¿CO0¯]/[CH;COOH].

A: Answer and explanation is attached below hope you like it.

Q: Use the References to access important values if needed for this question. When the following skelet...

A: Concept  1) The species which oxidised others while reduced itself is called oxidising agent.  2) Th...

Q: SnO2  +  H2   ? Sn  +  H2O

A: The balanced equation is-  SnO2 + 2H2 = Sn + 2H2O

Q: When the Pb2+ concentration is 1.15 M, the observed cell potential at 298K for an electrochemical ce...

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Q: What is N3− classified as? Group of answer choices strong acid weak acid strong base weak base salt...

A: Given,  N3− 

Q: Pentaborane BgHgls) burns vigorously in O2 to give B203s) and H2O0. Calculate AHren for the combusti...

A: Moles of B5H9 = 5 mole  

Q: Select the single best auswer. Which of the following has more atoms: 4.08 g of hydrogen atoms or 18...

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Q: Which of the following additions will result in a decrease in the pH of the solution? O Adding ammon...

A: 1) adding ammonium nitrate to an ammonia solution.

Q: In a liter of 0.2F solution of propionic acid, HCSHO2_it has ionization constant of 1.34 x 10, calcu...

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Q: NH2NH2 ? H Mild Acid N-Me Vicodon Мео. Мео. H H N-Me H* H N-Me N NH2 Me HN в A Meo, Meo. H H N-Me H ...

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Q: 45.00 mL of 0.010 M HCI(aq) was mixed with 65.00 mL of 1.0 M Ba(OH)2(aq) in a Styrofoam cup calorime...

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