Ⓒ Macmillan Learning A sample of hydrogen sulfide, H₂S, has a mass of 51.00 g. Calculate the number of hydrogen sulfide molecules in the sample. number of molecules: molecules

Q: Use the orbital diagrams to explain why the first ionization energy of nitrogen is greater than the…

A: First we will discuss what is ionisation energy. The energy required to remove electrons from…

Q: For electromagnetic radiation, when wavelength goes UP, frequency goes DOWN. O True False

A: Introduction Electromagnetic radiation is the transfer of energy by means of electromagnetic waves…

Q: b) Yo AICI 380

A: Note: According to our guidelines we are supposed to answer only first three subparts. Kindly repost…

Q: The Diels-Alder reaction below is very slow. Give two reasons for this observation.

A: Diels-Alder reaction is [4+2] π cycloaddition reaction because diene compound ( which contain…

Q: a b C -ОН Conc. H₂SO4 A 1. NaNH2 2. 1. NaNH, 2. CI CI

A: Alcohols reaction with acid followed by heating undergo dehydration to give alkene.  The major…

Q: Write an acceptable IUPAC name for the compound below. Include 'cis' and trans' as part of the name…

A: In the given molecule, two stereocentres are presents. It is quite necessary to number the carbon…

Q: 2) Find the molality of NaCl in solution e Equation editor here to show all your work! You can copy…

A: 2. Given that, The mass of the empty 100 mL beaker = 47.231 g. The mass of the beaker + distilled…

Q: The half-life of a first order reaction is 50 minutes. What percentage of the original sample will…

A: Given  t1/2 = 50  We have to find out the percentage of original sample after 200 minutes

Q: When a solution of AgNO3 is mixed with a solution of K₂SO4, a solid precipitate will form. False…

A: When a solution of AgNO3 is mixed with a solution of K₂SO4 , a double replacement reaction occur…

Q: If you have 0.36mol C that reacts with excess CuO, how many atoms do you have of Cu?

A: Answer: Limiting reagent is the reactant that exhaust first in the chemical reaction and decides the…

Q: Write a net ionic equation for the overall reaction that occurs when aqueous solutions of potassium…

A: Answer :

Q: Determine the mass percent aluminum in Al2O3

A: We have been given Al2O3.We have been asked to determine the mass percent aluminum in Al2O3.Al2O3…

Q: Which type of electromagnetic radiation has the shortest wavelength? O X rays Radio waves O Ultra…

A: X rays has the shortest wavelength means they have higher frequency. The order of increasing…

Q: What mass of iron contains 6.12 * 10^22 atoms of Fe?

A: Molecular weight of Fe=58.845g/mol. Avogadro Number=6.02×10^23atoms/mol.

Q: 22. Although the standard molar entropy, (AS), of a lot of chemicals are available, (AS) of most…

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Q: The gas phase decomposition of hydrogen iodide at 700 K HI(g) → H₂(g) + ½/1₂ (9) is second order in…

A: We have been given initial concentration, concentration at time (t) and rate constant. We have been…

Q: 4A1+30₂ → 2 A1₂ 03 How much aluminum would be needed to completely reach with 45gm of 0₂? 02 2 @…

A: We know  number of moles = Given Mass / Molecular Mass

Q: Is H2O a polar or nonpolar molecule? Answer is polar. Can you explain to me that why is the polar…

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Q: Macmillan Learning Balance the equation using lowest whole-number coefficients. equation: C₁2H₂2O11…

A: Since, Balanced reaction means that both side number of atom present in equal number. Thus,

Q: Rank the carbocations in the table below in order of increasing stability (1 least stable and 4 most…

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Q: Select all compounds with at least one polar bond. CH₂CH₂CH₂ CCI 0₂ O=C=O

A: This question is related to polarity of bonds which arises due to electronegativity difference…

Q: Caffeine has the empirical formula C4H5N2O and an approximate molecular weight of 97.1 g/mol. What…

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Q: What is incorrect about this electron configuration? Give the correct electron configuration. Assume…

A: Cr has atomic number = 24

Q: @LOT grams 2 Na + 2H₂O → 2 Na OH + H₂ en are How many grams of Hydrogen produced if 120gm of Na are…

A: Mass of Product: Sodium is an alkali metal. Sodium reacts with water and produces hydrogen gas and…

Q: Consider the following substances: Lead (II) Carbonate, PbCO3 KSP = 7.40 x10-14 Magnesium Carbonate,…

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Q: Use IUPAC naming rules to name the following hydrocarbon compounds: a) CH3CH=CH=CH-CH=CH b) I CH₂ I…

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Q: Each of the Lewis structures shown contains one polar covalent bond. Identify the bond, and use the…

A: polar covalent bond contains one more electronegative atom and one electropositive or less…

Q: Use your Lewis diagram to fill in the table below: Electronic Geometry Shape H's C O N What bond…

A: In formamide, the central carbon atom is sp2 hybridised which means that the molecular geometry…

Q: A chemist is studying the following equilibirum, which has the given equilibrium constant at a…

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Q: What is the osmotic pressure of a solution at 22.5 oC when 3.5462 g of CoCl 2 (MM = 129.839 g/mol)…

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Q: 7. Consider the reaction: N₂(g) + O₂(g) = 2NO(g); K= 1.0x10-6. Suppose a sample of air contains…

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Q: i) Redraw serine, using wedged bonds, to show its two enantiomers: HOOC NH₂ CH₂OH Serine H Assign…

A: Amino acids occur naturally as L forms. However, carbohydrates occur naturally as D- sugars. The…

Q: A new element Z has been discovered.  There are 2 isotopes of this element: Z-121 which has an…

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Q: Aqueous hydrochloric acid (HCI) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium…

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Q: How many particles of copper (II) oxide were there if you have 12.3g of carbon dioxide were…

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Q: des cis-2,3-dimethyloxirane can react with hydrochloric acid to form 3-chloro-2-butanol. H₂ H₂C H…

A: In the given reaction, the reaction is stereoselective , in question (a) we have to give how many…

Q: what is the molecularity of the rate- determining step in the proposed mechanism?

A: The molecularity of a reaction is defined as the number of molecules , atoms or ions of the…

Q: Draw the Lewis structure created by the curved arrow. Write in formal charges wherever they are not…

A: -> There is resonance if loan pair is conjugated with positive charge or double bond .

Q: ›. Each of the following names is incorrect. Give thee correct name for each compound (a)…

A: In all the given names,  there are mistakes in the proper assignment and numbering of the parent…

Q: quantum number. ): Identify electron based on its Please identify the atomic orbitals that the…

A: We know that  Quantum numbers of electron in an orbital is expressed in the form of (n, l, ml)…

Q: 6. Cleaning a paint brush using turpentine or paint thinner is an example of what separation method?…

A: We have to find out the separation method of cleaning a paint brush using turpentine or paint…

Q: Which bond would you expect to be the most polar? ON-C ON-O OP-C O C-F O C-o

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Q: How many protons and neutrons are in an atom of Mn-52 ?

A: Introduction An atom is the smallest particle of matter that is considered to be a chemical element.…

Q: Write the equation representing the equilibrium between liquid water and water vapor. Express your…

A: Given:   Concept: Vapor pressure of a liquid in terms of an equilibrium. We have to write the…

Q: Use Slater's rules to calculate Zeff for the outermost electron of F (2p)

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Q: A protein's polypeptide chain. O primary O secondary O tertiary quaternary structure contains…

A: Introduction Proteins are complex molecules made from amino acids linked together by peptide bonds.…

Q: Carbonate, CO32-, has three resonance structures. Draw these resonance structures and then draw the…

A: Since, Resonance structures are those structure whose molecular formula is same but arrangement of…

Q: An element has three naturally occurring isotopes with the following masses and abundances.…

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Q: 1. Predict-the-Product Draw the structure(s) of the major organic product(s) formed in the following…

A: we have to draw the major product of the given reaction

Q: how do you calculate the mass of evaporating dish after removing iron fillings? And the mass of Fe?

A: By simply subtracting the appropriate masses , one can find the mass percent of Fe.

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.