Draw out the Lewis structures of these reactants and products and apply the analysis indicated in the instructions. 2Fe(s) + 3S(s) --> Fe₂S3

Q: In the following oxidation/reduction reaction identify  the species that is oxidized: 2Mg(s) + O2(g)…

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Q: 9. Complete and balance the following equation (include correct physical state of each product)-…

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Q: TaO, is very unlikely to exist, but let's pretend that it does. Write the balanced chemical equation…

A: Answer:- This question is answered by using the simple concept of balancing the redox reaction.

Q: Calculate the enthalpies of formation, AH;, of group 1 chloride compounds from their elements by…

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Q: 21.1 g of magnesium metal is burned in air to produce magnesium oxide, which is then dissolved in…

A: Mass of magnesium =21.1g Volume of water=1.89L Concentration of hydroxide=?

Q: Draw the Lewis structure for the ammonium (NH) ion.

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Q: Which of the following reactions is likely to be product favored based on energetic considerations?…

A: There are mainly two types of reactions.Exothermic reactions: These are reactions in which the…

Q: why HCHO behaves both as oxidising and reducing agent?

A: In formaldehyde the oxidation state of carbon is 0.

Q: Which of the following has the lowest first ionization energy? Rb Si P Al S

A: as along the period the first ionisation increases and along with the group the first ionisation…

Q: The first four ionization energies of an element X are 578, 1817, 2745, and 11,577 kJ·mol–1. What is…

A: The number of valence electrons can be found in the element X using the ionisation energies  Since…

Q: O 4

A: Given Lewis dot Structure of Cl2O

Q: Write a balanced chemical equation for the incomplete combustion of methane to produce CO(g) as the…

A: The incomplete combustion of methane in the presence of limited amount of oxygen gas leads to the…

Q: presence of 02(0) Torn 201s) is-25.0 kJ per mol 02. In the compound ZO(e), Z has a +2 formal charge.…

A: Gibbs free energy is a thermodynamic state function. It is a property of a system that measures the…

Q: Based on the bond energies for the reaction below, what is the enthalpy of the reaction? HC≡CH (g) +…

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Q: 1) what are the oxidation state for the reactants As and Cl in this reaction? 2 As (s) + 3 Cl2 (g)…

A: Oxidation number, which is also termed as oxidation state, is type of hypothetical charge present on…

Q: Draw the Lewis structure for the tribromide  Br−3  ion.

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Q: Element Atomic Atomic Radius E- configuration ( short Boiling Melting Standard 1st Point in…

A: The standard enthalpy of fusion is the heat (enthalpy) required to change the physical state from…

Q: Find the oxidation numbers of N

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Q: Write the empirical formula for at least four ionic compounds that could be formed from the…

A: Given,The ions:PO43-, CrO42-, Fe3+ and Pb4+

Q: When aluminum combines with non-metals, it always has an oxidation number of +3. What 3 electrons…

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Q: Identify and account for the bonding sodium bromide (NaBr)

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Q: determine which of the following substances are capable of oxidizing Br- ions? a) Cl2 b) H + c) Ni2…

A: Let's have a look at electrochemical series first:

Q: NaF and CaO.Which has the higher melting point and why?

A: The compound which has  the higher melting point has to be given,

Q: How many electrons are in the Lewis structure of a nitrite ion, NO2-?     18     17     16…

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Q: Is MnO₄⁻ or ReO₄⁻ a stronger oxidizing agent? Explain.

A: Concept introduction: Oxidizing agent the substance that accepts electrons in a reaction and…

Q: Law of conservation of mass within a chemical Equation Please write an balanced equation

A: For a balanced chemical equation  No of each atoms in reactant must be equal to no of each atoms in…

Q: what is the enthalpy change when 45.7 grams of dinitrogen tetraoxide form?  2 NO2 (g)   →    N2O4…

A: Enthalpy change is the change in energy of the reaction.

Q: Which may form +1 or +3 ions, depending on the conditions? A) gold  B) postassium C) silicon

A: Transition metal placed between s-block and p-block elements and they are termed as d block…

Q: 3H2   +  N2    =>  2NH3

A: Exothermic reactions are those chemical reactions which occur with evolution of heat.Endothermic…

Q: The Ka for HF is 7.0 x 10-4. Kh for the fluoride ion is O 1.6 x 103 O 1.4 x 10-11 O 7.0 x 10-18 O…

A: Ka is the acid dissociation constant and Kb is the base dissociation constant.  Higher value of Ka…

Q: Consider the following data for molybdenum: atomic mass 95.94 mol electronegativity 2.16 kJ 71.9 mol…

A: Given  Electron Affinity = 71.9 kJ/mole Ionisation energy =684.3 kJ/mole

Q: Calculate the standard enthalpy of formation of the M2O(s) metal oxide (AH+ in kJ/mol) using the…

A: The enthalpy change for the reactants to the products is the same whether the process occurs in a…

Q: How many kj of heat are needed to produce 6.47 g NH 3 ? 4NO+6H 2 O 4NH 3 +5O 2; triangle H=906 kJ

A: From given data,  mass of NH3  = 6.47 g                  ∆H = 906 kJ   Also, molar masses are…

Q: 2. Calculate AH® for the reactions represented by the following equations: m (a) 2 H,(g) + 0,(g)→2…

A: It's a multiple part question.

Q: 6. Define the term disproportionation reaction and explain why the reaction 2 H₂O₂ → H₂O + O2 is a…

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Q: Identify the reaction that shows the formation of an ionic hydride: O N2 + 3H2→ 2NH3 O Cl2 + H2 –→…

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Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.