Using the bond breaking and bond forming method, estimate the enthalpy associated with combusting one mole of hydrogen with molecular oxygen to form water under standard conditions (1 M, 1 atm, 298 K).

Q: Calculate the enthalpy of combustion per mole when 4.10 g of methane burns in oxygen and 236 kJ of…

A: Enthalpy of combustion means the heat energy is given out when one moles of any substance completely…

Q: estimate the fraction of electrons above fermi level in sodium and copper at room temperature

A:

Q: What is the biggest difference between the Lewis and the AO-model in terms of the localisation of…

A: Localized electrons are the bonding electrons whereas the delocalized electrons are the non-bonding…

Q: What mass of silver oxide, Ag2I, is required to produce 25g of silver sulfadiazine, AgC10H9N4SO2,…

A: Molecular mass of any compound is sum of atomic masses of all the elements present in that compound…

Q: write a summary on Production of inorganic light-harvesting materials for solar cells

A: A solar cell is an electrical device which converts the light energy directly into electricity by…

Q: Calculate the maximum wavelength of radiation that could have sufficient energy to effect the…

A: To find out the maximum wavelength of the radiation which will have sufficient energy to dissociate…

Q: Differentiate between ionic bonding and van der Waals bonding.

A: Differentiate between ionic bonding and vander Waals bonding.

Q: Sodium Magnesium Copper Lithium Zinc Aluminum Silver Tin Potassium Strontium Calcium Barium Cesium…

A: Valancy of a atom can difine as  a single atom is able to combine with no of atoms. Valancy is equal…

Q: X = X + 2, (9.30)

A: From the expression: χ=χi+λ where X: Susceptibility Xi: Contribution of the ions (core electrons) λ:…

Q: Calculate the standard enthalpy of formation of the M20(s) metal oxide (AHf in kJ/mol) using the…

A:

Q: What is the significance of leaching in the extraction of aluminium ?

A:

Q: Describe the origins and behavior of sulfur oxides and nitrogen oxides as air pollutants, including…

A: Nitrogen oxide i.e. NO2 is found in air as an air pollutant. It is mainly produced from burning of…

Q: Briefly describe the contributions of Walter Nernst, T. W. Richards, Max Planck and G. N. Lewisin…

A: The third law was given by Walter Nernst. It states that the entropy of a system at absolute zero is…

Q: In what ways are the electronic structures of the group 14 (4A) elements similar? In what ways are…

A: Ans. Group 14 elements have same valence electrons i.e valency. Group 14 elements have different…

Q: Define the term pyrometallurgy?

A: Pyro means “heat or temperature” and metallurgy is the branch of science which concerned with the…

Q: What role is played by CO2 in getting pure alumina (A1l2O3) in the extraction of aluminium?

A: Extraction of metals: As metals are found in mines in combined state in ores. It is necessary to…

Q: The tropospheric processes discussed in this chapter cannot be considered as independent reactions.…

A: Disscussing the relationship between production of nitrogen oxide species and formation of acid…

Q: Based on the chemical structure of Sudan I, discuss how this accounts for its highly-colored…

A: Conjugation In a molecule means electrons are delocalized in that molecule.

Q: Calculate the standard enthalpy of formation of N2O5 from the following data:       2 NO(g) + O2(g)…

A: Given: 2 NO(g) + O2(g) → 2 NO2(g)       ΔrHΘ = -114. 1 kJ mol-1 4 NO2(g) + O2(g) → 2 N2O5(g)    ΔrHΘ…

Q: Calculate the shortest wavelength of light capable of dissociating the Cl-Cl bond and one molecule…

A: Energy required to break 1 molecule of any atom is; E=bond energy per mol Avogadro number The…

Q: Write by equations the formation of O3 in a photochemical smog

A: formation of O3 in a photochemical smog.

Q: Formulate the acid-base reactions with ions, mark conjugate acid-base pairs of the reaction of…

A: An acid is the species that donates H+ or accepts lone pair. A base is a species that accepts H+ or…

Q: Purification methods of cobalt(II) sulphate (CoSO4.7H2O)

A:

Q: Which of the following chemical formula is for a cyclic compound that contains two double bonds? O…

A: Degree of unsaturation :- It indicates how many double bonds or triple bonds or rings are present in…

Q: A Jahn-Teller effect will most likely be observed with O [Zn(H2O)g]²+ O Co(pyridine)4(CN)2 O…

A: The complex which has unsymmetrical eg orbital shows Jhan Teller effect.

Q: Calculate the following:  Standard enthalpy of formation of methane,  the enthalpy of atomization of…

A: Combustion means the substance is burned in oxygen.

Q: If the molecule XY, which has an enthalpy of ionization of 1,500 kJ/mol as per the reaction below,…

A: Given the ionization enthalpy of the molecule, XY = 1500 kJ/mol First, we have to convert the…

Q: For each of the following molecules, write a Lewis structure, predict the molecular structure…

A: So we’re going to determine Lewis structure, molecular structure ,bond angles, and hydra orbitals…

Q: It is estimated that the total amount of oxygen (O2) contained in BIFS is equivalent to 6.6% of the…

A: Amount of oxygen present in atmosphere of BIFs = 6.6% of 21% of  5.01× 1018 Kg.    = 6.6100× 21100 ×…

Q: What is meant by the term ‘pyrometallurgy’?

A: A process that is used for the extraction of metals in their pure form is known as metallurgy.…

Q: patiomagnesium sulphate crystals (MgSO,.7H,O) can be dehydrated by heating. Calculate the percentage…

A: Percentage by mass of any component  may be calculated as:                %ge by  mass=Mass of that…

Q: Briefly describe the physical origin of the van der Waals bond. Name some elemental systems in which…

A: Van der Waal forces

Q: Write and balance the Chemical Equation: HC2H3O2 + CaCO3→ calcium acetate + H2O + carbon dioxide

A:

Q: Using the enthalpy of reaction for two reactions with ozone, determine the enthalpy of reaction for…

A: Given :-  1) ClO(g) + O3(g) →Cl(g) + 2O2(g) ∆H°rxn = -122.8 kJ   2) 2O3(g) → 3O2(g)  ∆H°rxn = -285.3…

Q: Q2.(d) Explain why ultra-pure substrate materials and stringent health and safety requirements are…

A: Fabrication of semiconductor materials takes place in a cleanroom.While silicon-based semiconductor…

Q: Write the chemical equation involving the catalysts for the following chemical reactions: a. Haber…

A: A catalyst may be defined as the substance which when present in a chemical reaction alters the rate…

Q: 5. Explain why lattice enthalpy calculations based on the Bom-Mayer equation reproduce the…

A: Born-Mayer equation is used to calculate the lattice energy of a crystalline ionic compound.…

Q: A nonmetal like oxygen forms both ionic and covalent bonds, depending on the identity of the element…

A: Solution- Calcium (Ca) is a metal and it partially loses two electrons and transfers to oxygen atom…

Q: Explain the Jahn-Teller effect and provide an example. (Inorganic Chemistry)

A: John- Teller effect :- The Jahn-Teller (J-T) theorem states that in molecules/ ions that have a…

Q: How many valence electrons do you have to account for when drawing the Lewis dot structure of PCl5?

A: Valence electron of phosphorus is five and valence electrons of chlorine is seven.

Q: Calculate the standard energy of formation of CI0 from the following bond energies. Clh: 242.7…

A:

Q: Balance the equation for the production of acetylene C2H2  from the reaction of calcium carbide with…

A: The balanced equation for the production of acetylene from calcium carbide and water is as follows:

Q: Complete and balance the following equations: N2O31g2 + H2O1l2 ¡

A: In chemistry, a chemical reaction contains two major parts- Reactants ( substrate ) and Products.…

Q: Why is nitrogen used in the decomposition of ethanal to produce methane and carbon dioxide?

A: Because nitrogen is inert gas.

Q: Write the name of three steps of free-radical halogenation of methane?

A: Radicals are atoms, ions or molecules that have one unpaired valence electron. Free radical…