The empirical formula of compound R is ____________________

Q: In what way do aerosols affect atmospheric cloud formation?

A: a. An increase in anthropogenic aerosol typically increases cloud condensation nuclei and cloud drop...

Q: ete chemical formula for the

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Q: aqueous solution was prepared by dissolving 4.93 g of KI in enough water to make 500.0 mL of solutio...

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Q: A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 4....

A: Answer: Since, heat is flowing out of the water bath and entering into the flask, therefore temperat...

Q: Question 16 Which of the given statements are CORRECT for an indicator that ionizes as shown below (...

A: Given :  Ka of indicator = 1.0 x 10-4  => pKa = - log Ka = - log(1.0 x 10-4) = 4 

Q: Question 11 OH O: H FC- OH но—с —н н—с H- -OH H -C-H OH Which of the following best describes the sa...

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Q: A 0.800 M HCl was diluted to a final volume of 500. mL . If the new concentration is 0.20M . What wa...

A: Given: Initial concentration of HCl = 0.800 M Final volume of solution = 500 mL. And the final conce...

Q: Fill in the blanks of the following reaction scheme using any reasonable starting materials and reag...

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Q: For the equation SnO2 + 2H2 → Sn + 2H2O, tin (IV) oxide reacts with excess hydrogen to produce tin a...

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Q: Consider the following reaction: 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) If 3.60 g NH3 and 5.40 g O2...

A: The answer is as follows:  

Q: Which of the following combination can be used to prepare a buffer with a pH of 7? са NaHCOз and Naz...

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Q: Which carbon of the open-chain form of a sugar becomes the anomeric carbon in the cyclic form?     ...

A: when a pair of stereoisomer is developed due to the difference in configuration at  C1 chiral centre...

Q: How many atoms does a simple cubic cell contains? Select one: a. 2 atoms b. 3 atom c. 4 atoms d. 1 a...

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Q: What volume of 0.220 M HBr solution is required to produce 0.0190 moles of HBr? Answer should be in...

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Q: One of relatively few reactions that takes place directly between two sollds at room temperature is ...

A: For a balanced reaction number of atoms of each element must be equal on both sides.   Given :  Mass...

Q: The heat of vaporization of hexane is 30.8 kJ. mol-1. The boiling point of hexane at a pressure of 1...

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Q: Nitrogen and hydrogen react to form ammonia, like this: N,(g)+3H,(g) 2NH, (g) Suppose a mixture of N...

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Q: If 10.0 mL of hydrochloric acid is titrated by 16.4 mL of NaOH that has a concentration of 1.7 M, wh...

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Q: Which structure is a portion of 1. chitin 2. glycogen 3. Dextran 4. Cellulose? IN-, 1. B 2. A 3. D 4...

A: the solution is shown below.

Q: 3H2 (s) + N2 (g) --> 2NH3 (s) (balanced) When 19 grams of nitrogen react, the actual yield is 10.5 ...

A: 3H2 (s) + N2 (g) --> 2NH3 (s) (balanced)From the equation  1 mole N2  = 28 gm of N2  produce =2 m...

Q: A 0.355 L soft drink contains 45.5 g of sucrose, which has a molecular weight of 342.3 g/mol. What i...

A: Given that, Volume = 0.355 L  Mass of Sucrose = 45.5 g  Molar mass or Molecular weight of Sucrose = ...

Q: 1. Write the equilibrium expression and identify the specific equilibrium constant symbol possible, ...

A: In equilibrium expression pure solid and pure liquid do not appear because their activity is taken a...

Q: A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 3....

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Q: 1.46 g Potassium hydrogen phthalate requires 34.3 mL of 0.145M NaOH for neutralization, what percent...

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Q: On acidity and basicity of aqueous solutions, the following relationships are valid, except ...

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Q: Three buffers are made by combining a 1M solution of acetic acid and a 1M solution of sodium acetate...

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Q: er is playing the r

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Q: water in the air (at equilibrium) will decreased the vapor pressure of water at that temperature c. ...

A: Here some water is put on an open stove at initial temperature.  In that case evaporation and conden...

Q: A solution of phosphoric acid (HsPO.) with a known concentration of 0.250 M H.PO, is itrated with a ...

A:   Acid-base reaction :  H3PO4  + 3 NaOH  -->  Na3PO4  + 3 H2O  At equivalents point  Ma Va / na  ...

Q: For each reaction in the table below, write the chemical formulae of any reactants that will be oxid...

A: The chemical species is oxidized when it adds oxygen or removes hydrogens or removes electrons. The ...

Q: The instrument used in the titrations which hold the titrant is called? Select one: a. pipette b. Bu...

A: Generally in titration we take burette and conical flask . Let's discuss where we will take titrant.

Q: HO но Clindemycin Brucine

A: The compounds given are,  

Q: Question 21 Match the structures with the description NH NH CHO HO CH, OH HO NICH CH ocit, CH, H >

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Q: 5. Using sodium as example sketch the following: simple cubic lattice (sc) a. b. body-centered cubic...

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Q: HO H. NH2 H. HO, H2N Cephradine Cephalexin

A: R-S nomenclature: R-S nomenclature is used to determine the stereochemistry of chiral carbons of a m...

Q: In biological systems, buffers are important because they facilitate changes in pH to enhance biolog...

A: Buffer is a solution contains acid or base or a salt which can maintain the concentration of hydroge...

Q: what is compound C

A: In first step give positive test of carbohydrate by treatment with Alpha-naphthanol/H2SO4. Now perfo...

Q: Give the general formula of the following: 1. Alcohols 2. Phenols 3. Ethers What is the nomenclature...

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Q: Methylamine CH3NH2 is a weak base with pKb =3.36. What is the value of Ka for the trimethylammonium ...

A: Answer: This question is based on conjugate acid-base pair.

Q: What amount (moles) is represented by each of these samples? a. 20.8 mg caffeine, C3H10 N4O2 Amount ...

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Q: What mass of ethylene glycol (MW. = 62.1 g/mol) antifreeze must be added to 10.0 liters of water to...

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Q: он CHOH он CHOH но. I ACNH II OH CH3" OH HO III но What is the monosaccharide at the reducing end? O...

A: We have to predict the reducing end.  

Q: The pressure inside a hydrogen-filled container was 2.10 atm at 21∘C. What would the pressure be if ...

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Q: 1. Silver has two naturally occurring isotopes with the following isotopic masses: 107 107 47 Ar 106...

A: Answer: To solve this question we have to use the relation between average atomic mass and % abundan...

Q: Salivary amylase is used to hydrolyzed a(1à4) glycosidic bonds in carbohydrates. O True O False

A: Salivary amylase in used for hydrolysis of carbohydrates.

Q: Find the molarity of 0.13g of calcium hydroxide, Ca OH)2, 33.00 mL solution

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Q: Which of the following is the correct glycosidic bond linkage of the disaccharide shown? OH но- но. ...

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Q: A juice concentrate was colorimetrically assayed using Nelson’s test. One milliliter (1.00 mL) of th...

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Q: Instructions: Complete the table below.

A:   Types of intermolecular forces (IMF's) : 1. Dispersion forces (or) London forces : These forces ex...

Q: K! Play Kahoot!-Enter ga x O Chapter 4.1 W OLogin Greek god personality Bell Ringer 2/28/22 isd.inst...

A: Atomic number of Krypton=36 Atomic mass of Krypton=84 The number of subatomic particles inside and o...

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.