A certain element consists of two stable isotopes. The first has a mass of 138 amu and a percent natural abundance of 8.90x102 %. The second has a mass of 139 amu and a percent natural abundance of 99.9 %. What is the atomic weight of the element? amu

Q: Determine the empirical formula of the following compound if a sample contains 0.104 mol K, 0.052 mo...

A: Moles of K = 0.104 moles Moles of C= 0.052 moles  Moles of O = 0.156 moles

Q: Why does  acid rain fall far from the source?  Show the equations  leading  from  the combustion  of...

A: Interpretation- Tell why does acid rain fall far from the source and show the equation leading from ...

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Q: Estimate the λmax of the following organic compounds. Show your solutions and/or analysis.

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Q: 6. Çalculate the mass (in g) of 2.3 x 1021 molecules of CO2.

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to ...

Q: N2 H2 initial rate of reaction 0.542M 1.15M 84.0M/s 0.542M| 0.380M 9.17M/s 2.55M 1.15M 395.M/s Use t...

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Q: Determine the point group of the following molecule: C Mo: C O -C=O O=C. O=C C

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Q: Balance the following chemical equation (if necessary) for the combustion reaction of propane: C3H8(...

A: In multiple questions we solve only first question according to Bartleby guidelines. Balance the ele...

Q: At a certain temperature the rate of this reaction is first order in H,CO, with a rate constant of 2...

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Q: ne number of grams of krypton in th

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Q: how much heat Q needs to be supplied to the gas?

A: In this question  wh have to calculate the heat Q needs to be supplied to the gas with teh help of m...

Q: Identify which conversion factor should be used in each of the following conversions using the dropd...

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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: Each row of the table below describes an aqueous solution at about 25°C. Complete the table. That i...

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Q: Acetic Acid contains only C, H, nd O. 4.52mg sample of Ace tic Acidis complotely burned. It gives 6....

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Q: The formation of K2SO4 is given by the reaction: 2KCI+H2SO4 → 2HCI +K2SO4 If 50.6 g of H2SO4 is used...

A: Given  Reaction  2KCl + H2SO4   →  2HCl + K2SO4 Mass of H2SO4  = 50.6 gram  To find : Mass of HCl 

Q: Pureed apricots have a pH of 3.83. This is due to the presence of Vitamin C, citric acid, in the pur...

A: Citric acid dissociates as follows: H3C6H5O7⇌H++H2C6H5O7-C                      0          0C-x     ...

Q: Problem 48 C10H200 Problem 48 - 13C NMR spectrum (CDC13, 125 MHz) MW = 156 34.5 45.0 22.2 23.1 20.1 ...

A: 13C-NMR: 13C-NMR provides information about the types of carbons of unknown. The peaks in the range ...

Q: The equilibrium constant, Ka, for the following reaction is 1.29x10-2 at 600 K. coCI2(g) co(g) + Cl2...

A: The balanced equilibrium reaction given is  COCl2 (g) ⇌ CO (g) + Cl2 (g)  The equilibrium constant K...

Q: For a one component system, when three phases are in equilibrium, then system becomes. O condensed s...

A: The correct answer about phase equilibrium is given below

Q: Draw the following: 1. The chair structures of the most stable molecule below. (Choose the most stab...

A: This question belong to stereochemistry organic chemistry. We will decide the stability of 2 structu...

Q: Kc for the reaction of hydrogen and iodine to produce hydrogen iodide.  H2(g) + I2(g) ⇌ 2HI(g) is 54...

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Q: The pH of pure water at 50°C. is 6.63. At 75°C the pH is 6.35. Compare Kw values at 25°C, 50.°C and...

A: Answer attached below

Q: Determine the point group of the following molecule: Fe

A: The given compound is Ferrocene. It is a staggered compound.

Q: At a certain temperature the rate of this reaction is first order in N,O, with a rate constant of 0....

A: The given reaction follows the first-order kinetics. The rate of the first-order reaction depends on...

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: 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: 8. A strong signal in infrared spectroscopy indicates that a molecule matches the emitted electromag...

A: When a matching electromagnetic radiation fall, the electrons are get excited.

Q: True or False 1. Photodiode arrays are devices within the instrument that help amplify the signal of...

A: *Photodiode is a semiconductor device that converts light energy into electrical energy through a PN...

Q: H2 2 initial rate of reaction 1.23M 1.18M 4.00 × 10°M/s 0.381M 1.18M 1.24 x 10°M/s 1.23M |3.10M 1.05...

A: Given Concentration of reactants  Initial Rate of reaction  What have to determine ? Rate law exp...

Q: Imagine you have a closed vessel with seawater and you add 10µmol/kg of CaCO3. What happens? (select...

A: General properties of CaCO3

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

A: oxidation-reduction reaction means a reaction in which both oxidation and reduction takes place simu...

Q: A compound is found to contain 31.42 % sulfur, 31.35 % oxygen, and 37.23 % fluorine by mass. What is...

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Q: e molality of lelit.

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Q: Draw the major and minor product that could be formed when 1-methoxy-1,3-butadiene reacts with 2-met...

A: Diels-Alder reaction: The Diels–Alder reaction is a pericyclic reaction (cycloaddition) between a co...

Q: About half of the hydrochloric acid produced annually in the United States (3.0 billion pounds) is u...

A: Solution given below

Q: Show two possible propagation pathways for a general radical molecule

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Q: 17-28. At 400 K oxalic acid decomposes according to H,C,O,(g) → CO,(g) + HCHO,(g) The rate of this r...

A: The given reaction is :

Q: Sodium reacts with oxygen to produce sodium oxide as follows: 4Na(s) + O2(g) → 2Na2O(g) If you hav...

A: Given :-  4Na(s) + O2(g) → 2Na2O(g) Mass of Na = 22.74 g  To calculate :-  Amount of O2 required (in...

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Q: Consider the following exothermic reaction: C2H4 (9) + Cl2 (9) = C2H¾C12 (g) Part A If you were a ch...

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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: Copper (II) sulfate pentahydrate, CuSO4 • 5 H2O, has 5 moles of H2O for each mole of CuSO4 in the so...

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Q: Passing nitrogen monoxide and oxygen gases into an aqueous solution of sodium carbonate yield sodium...

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Q: How to draw Newman projections from chair conformations (and vice versa)? How to draw chair conforma...

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Q: Phosphoric acid is often added to colas to give them the tart flavor people like. RC Cola® has a pH ...

A: Answer is

Q: 1. For sodium perchlorate, AH =U= -382.9 and AH) =AHRydrationm =-369.5. What is AH,oln ? Is it an en...

A: Given that, for sodium perchlorate, ∆H0fs = U =-382.9 KJ/mol. Also, ∆H0faq =∆H0hydration = -369.5 kJ...

Q: When the following equation is balanced properly under basic conditions, what are the coefficients o...

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Q: 1.In testing a tablet, what are the meaning of these terms Disintegration Basket-rack assembly -  ...

A: We have to tell the definition of :-  Disintegration Basket-rack assembly  Disintegration time  Dis...

Q: 1. In a combustion process of a coal-fired power plant, 20% excess of the theoretical amount of Oxyg...

A: Answer is below

Atomic Structure

The basic structure of an atom is defined as the component-level of atomic structure of an atom. Precisely speaking an atom consists of three major subatomic particles which are protons, neutrons, and electrons. Many theories have been stated for explaining the structure of an atom.

Shape of the D Orbital

Shapes of orbitals are an approximate representation of boundaries in space for finding electrons occupied in that respective orbital. D orbitals are known to have a clover leaf shape or dumbbell inside where electrons can be found.