Potassium manganate is a dark green , crystalline substance whose composition is 39.6 % К, 27.9% Mn, and 32.5 % O, by mass. What is its empirical formula? Empirical formula:

Q: What is the pH of a bleach solution that has a [OH−]=7.1×10−4 M?[OH−]=7.1×10−4 M? pH=pH=     Is blea...

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Q: 5.)20.0 ml of 0.200M hypobromous acid, HBrO, is titrated with 0.250M sodium hydroxide, NaOH. Calcula...

A: Volume of HBrO = 20 mL Molarity of HBrO = 0.200 M Molarity of NaOH = 0.250 M To determine pH at equi...

Q: molecules

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Q: A certain element consists of two stable isotopes. The first has a mass of 68.9 amu and a percent na...

A: Mass of first isotopes = 68.9 amu Mass percent of first isotope = 60.4% Mass of second isotopes = 70...

Q: It is possible to separate multi-component solutions with the help of two solvents. O True O False

A: Solvent is present in large amount  in the solution .Solution is composed of solute  and solvent. So...

Q: Draw the MO diagram for the following conjugated systems. Using one of the MO diagrams your develope...

A: THE MO DIAGRAMS OF THREE COMPOUNDS ARE GIVEN BELOW

Q: v milliliters c

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Q: Part A Which of the following acids is the weakest? The acid is followed by its K value. O HBRO, 2.8...

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Q: Unknown compound D has a melting point of 102-103 degrees C. Carbon/ Hydrogen analysis of compound D...

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Q: How many grams of Co are there in a sample of Co that contains 9.57×1023 atoms? grams

A: 1 mole of any atom corresponds to Avagadro's number i.e. 6.023 x 1023 atoms. Therefore, Cobalt (Co) ...

Q: Question states. Select all forms that would definitely produce the photoelectric effect from a piec...

A: When a photon of electromagnetic radiation with sufficient energy falls on the surface of the metal,...

Q: ler certain conditions the rate of this reaction is zero order in hydrogen iodide with a rate consta...

A: Rate Constant,k = 0.0044M/s

Q: • Which of the following radicals is expected to be the least selective? 1. HO• 2. F. 3. Cl• 4. Br• ...

A: Answer 2 :-  Radical chain chlorination of 2,3-dimethyl pentane :  2,3-dimethylpentane 1 Alkane) rre...

Q: For calibration curve of true conc. 8,5, 6, 14, 40 and Ing/ml, find out the dynamic range and LLOQ, ...

A: Given that, for calibration curve of true concentration 8, 5, 6, 14, 40 and 1 ng/mL. We have to find...

Q: Part 1 Determine the number of significant digits in each number and write out the specific signific...

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Q: What is a molecule

A: Molecule is a combining of two are more than two elements by a chemical bonds.  Molecule is a electr...

Q: Determine the oxidation number of the Carbon in this given compounds. Note: Put the corresponding ch...

A: Given  Formula of molecule  = CO2 Oxidation number of carbon  =  ?

Q: СО (аq) + Н,0 (1) —D НСО, (аq) + ОН (аq) [HCO, ][H2O] (Co ]H2O] Keq [HCO3][OH¯] (Co] Kea -eq [HCO3] ...

A: Write equilibrium constant of the given reaction--

Q: Temperature "C Temperature "c

A: Solution-  Fractional Distillation- In fractional distillation, “fractionating” columns are insulate...

Q: Chemistry: Bonding 1. a. Identify and describe the type of bonding present in BaCl2. b. What is th...

A: Types of bonds:  1) Covalent bond:  Covalent bond is formed by the mutual sharing of electrons the t...

Q: Look at the table below: Substance pH Apple Juice 3.37 Apricots, pureed 3.83 Cherries, California 4....

A: pH is defined as negative logarithm of hydrogen ion concentration.

Q: Magnesium metal reacts with aqueous sulfuric acid solution to produce magnesium sulfate (in solution...

A: an increase in oxidation number means oxidation  a decrease in the oxidation number means the reduct...

Q: This is the laboratory apparatus used for liquid-liquid extraction. Florence flask Volumetric flask ...

A: For liquid liquid extraction is extraction of a particular compund from a solution with the help of ...

Q: Photosynthesis in plants converts carbon dioxide and water into glucose and oxygen. Calculate the ∆H...

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Q: 2. What is the mass of KHP that you will weigh? a. The instructions read "Weigh out accurately 700 t...

A: answer :

Q: rate

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Q: one of the following is not classified as native element a. diamond b. pyrite c. graphite d. quicks...

A: The element which occurs in nature in uncombined form is known as the native element. Hence the spec...

Q: Which statement is true concerning an oxidation-reduction reaction? O The reactant which is reduceci...

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Q: 6KNO3 How many moles of KNO, qre Produced If 439 of Ni(NO,)3 reacts

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Q: Which of the following has the greatest solubility? a. NiS (Ksp = 5.6 x 10-16) 3. %3D b. Fe(OH)2 (Ks...

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Q: he reaction will proceed to the right to establish equilibrium.

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Q: How many liters of 0.750 M lead (II) nitrate are necessary to react completely with 1.00 L of 2.25 M...

A: Pb(NO3)2 (aq) + 2 NaCl (aq) → PbCl2 (s) + 2 NaNO3 (aq)   Find Moles of NaCl:    Using Formula : Mol...

Q: When (CH3CH2)3CBr is added to CH3OH at room temperature, the major product is (CH3O)C(CH2CH3)3 and a...

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Q: At 298 K, the Henry's law constant for oxygen is 0.00130 M/atm. Air is 21.0% oxygen. At 298 K, what ...

A: Henry's Constant , KH = 0 .00130M/atm

Q: 1.) Arrange ice, liquid water, or water vapor according to their decreasing strength of intermolecul...

A: Since you have asked multiple questions, we will solve the first question for you. If you want any s...

Q: Calculate the activity of La3+ in a saturated solution of La(IO3)3 in 0.010 M La(NO3)3. Ksp = 1.0 x ...

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Q: Determine if each molecule below is an aldehyde, ketone or alcohol based on the ending. heptanal 3-m...

A: Alcohol contains R-OH  functional group . Ketone contains R-CO-R functional group. Aldehyde contain ...

Q: 3. Explain why the following names are incorrect and give a correct name in each case: a. 3-pentyne-...

A: This question belong to nomenclature of organic compound. In this question incorrect IUPAC name are ...

Q: A student dissolves 12. g of sucrose (C12H0) in 150. mL of a solvent with a density of 1.06 g/ml. Th...

A: Weight of sucrose=12g Solvent volume=150mL Density=1.06g/mL

Q: A Dumas nitrogen analysis of a 5.72-mg sample of compound E gave 1.31 mL of nitrogen measured a 20 d...

A: Given, A Dumas nitrogen analysis of a 5.72-mg sample of compound E gave 1.31 mL of nitrogen measured...

Q: Determine the [H3O+] of the eight buffer solutions made by mixing 1.10 M acetic acid and 0.900 M sod...

A: [Acetic Acid] = 1.10 M [Sodium acetate] = 0.9 M   We have to determine the concentration of hydroniu...

Q: (CH3),CHCI AlCl3 CH2 CH3

A: Given, 

Q: What is the molecular formula of the following structure? (CH3CH2)3COH O A. C7H160 O B. C7H140 O C. ...

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Q: Under certain conditions the rate of this reaction is zero order in dinitrogen monoxide with a rate ...

A: Rate Constant = 0.0028M/s Volume = 4L  

Q: Write the rate law for the reverse reaction: 2 NO = N202

A: Note : Since you have posted multiple questions, we are entitled to answer the first only. Please re...

Q: One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is b...

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Q: An analytical chemist is titrating 164.9 mL of a 0.3400M solution of propylamine (C,H,NH,) with a o....

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Q: Determine the magnitude and direction of the electric field at a point 0.5 m to the left of a point ...

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Q: Problem Solving Write all the steps for the statistical testing. The homogeneity of the chloride lev...

A: Answer is given below

Q: How many moles of Zn are there in a sample of Zn that contains 3.14×1024 atoms? moles

A:

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.