Which compound has the lowest melting point? O NaCl O CaO O KBr O BaO

Q: General Chemistry I Laboratory Manual, 2021 Revision 2) Calculate AH for the reaction below using…

A: Hess's law state that the overall change in enthalpy is given by sum of all changes independent of…

Q: Consider the molecule below. Of the indicated bonds, which would be expected to exhibit the lowest…

A: The stretching frequency of a bond of a functional group is directly proportional to the force…

Q: How many moles of carbon dioxide are produced when 14.9 g of HF are reacted with an excess amount of…

A: Sodium carbonate reacts with hydrogen fluoride to form water, carbon dioxide, and sodium fluoride.…

Q: In a molecular substance like H₂O that has covalent bonds, we consider the electrons as being…

A: The molecular substance H2O consist of covalent bond which means the two hydrogen atoms and one…

Q: When chemical A and chemical B are mixed together, and endothermic reaction below occurs: 4A(aq) +…

A: First we need to calculate the heat of reaction, then we would calculate moles of C produced.  Using…

Q: . Determine the number of electrons in a system of cyclic conjugation (zero if no cyclic…

A: If a compound follows 4n+ 2 electron system then its aromatic compound .

Q: Excess bromine gas is added to ethyne. The product of this reaction is: 1,1,2,2-tetrabromoethane O…

A: When alkyne is treated with excess of bromine then it becomes saturated and it colourless.

Q: Explain what scientific principles you used in making this prediction and how this supports your…

A: Highest melting point - CaO  Melting point of the molecules is given below-->  NaCl - 801°C CaO -…

Q: A 5.00 L tank at 23.6 °C is filled with 3.92 g of dinitrogen monoxide gas and 19.6 g of sulfur…

A: Given, Mass of dinitrogen monoxide (N2O) gas = 3.92 g  Mass of sulfur hexafluoride (SF6) gas = 19.6…

Q: ..11

A: (A) (i) BH3,THF (ii) H2O2, NaOH Hydroboration-Oxidation    (B) Hg(OAc)2, H2O (ii) NaBH4, NaOH…

Q: Please explain how to make a net ionic equation for a reaction between HCl and a generic buffer, and…

A: A buffer solution resists the pH change upon addition of a small amount of acid or base .There are…

Q: (a) The third row element with the largest first ionization energy. (b) The Group 3A element with…

A: To predict the element that fits to the given description. we have to keep in mind the periodic…

Q: ! Required information Problem 13.012 - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS NOTE: This…

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Q: so that means route a is preferrable in a small lab and route b is preferred in a chemical plant?

A: In this question, we have to explain which route A is preferrable in a small lab and route B is…

Q: A voltaic cell is constructed in which the following cell reaction occurs. The half-cell…

A: Given , Reaction : 3Cu2+(aq) +2Cr(s) →3Cu(s) +2Cr3+(aq)

Q: B. Reactions in Solution Consider the reaction that occurs when 75 mL of 1.2M sodium sulfate is…

A: A question based on stoichiometry. A precipitation reaction between Na2SO4 and Ba(NO3)2 is…

Q: Copper(II) sulfate solutions 1 M and 0.5 M 1 M and 0.1 M 1 M and 0.05 M 1 M and 0.01 M 1 M and 0.001…

A: Reaction quotient:- The reaction quotient of a certain reaction is the measurement of the amount of…

Q: The half-lives of different medical radioisotopes are given in the table. If the initial amount of…

A: In radioactive decay unstable nuclei decays into stable nuclei with emissions of some rays in the…

Q: What volume (in mL) of a 0.125 M HNO3 solution is required to completely react with 25.1 mL of a…

A: We will first determine the millimoles of HNO3 required to react completely with Na2CO3. and then we…

Q: Draw NaCl at the atomic level.

A: NaCl  count up the valence electrons that are at hand. Chlorine is in the 17th group on the…

Q: An analytical chemist is titrating 86.1 mL of a 1.100M solution of hydrazoic acid (HN3) with a…

A: The question is based on weak acid-strong base titration.  We have to calculate the pH of the…

Q: What phenomenon enables outer-sphere redox reactions to occur? Group of answer choices relaxation of…

A: Electron transfer (ET) occurs when an electron relocates from an atom or molecule to another such…

Q: be represented 1. The decomposition of PCBS can by the equation 2 C1₂ Hy Clb + 23 O₂ + 2H₂O → 24 CO₂…

A: 2 C12 H4Cl6 + 23 O2 + 2 H2O  ==> 24 CO2 + 12 HCl Given Mass of HCl = 76.5 g   Molar mass of HCl =…

Q: Draw the products of this reaction. Ignore inorganic byproducts. 1. KMnO4, OH¯ (warm) 2. H3O+

A: Hot alkaline solution of potassium permanganate oxidises a terminal alkynes. it could be oxidised…

Q: What is the bond order between the carbons in benzene (C₂H.)? H C H C C =c² H H .С. H H

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Q: A student collects 69.2 mL of hydrogen gas from the reaction of 0.082 grams of magnesium solid with…

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Q: How many stereoisomers are possible for this molecule? 08 16 02

A: Chiral carbon is a carbon atom which are attached with four different groups

Q: Choose the reagent(s) that would be most likely to complete this reaction.

A: Hydration of alkene: Alkene gives hydration reactions in presence of an acid catalyst. The reaction…

Q: 3. Synthesis! (Mechanisms are not required.) Provide TWO different syntheses for this ether, using…

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Q: 7. Using a Grignard reaction, show methods how you could prepare each of the following three…

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Q: I kefore unsaturated alpha beta) I

A: Here in the following given compound  we have  to indicate alpha and beta carbon atoms and to give…

Q: What is a correct cell notation for a voltaic cell based on the reaction below? Cu2+(aq) + Pb(s) +…

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Q: Assuming equal concentrations, arrange these solutions by pH. Highest pH

A: pH is a scale to measure the concentration of hydrogen ions. The negative logarithm of hydrogen ion…

Q: In this experiment, the color change from pink/violet to colorless during the titration is caused…

A: A redox titration is a type of titration based on a redox reaction between the analyte and titrant.…

Q: Concentration (grams/kg H₂O) Graph 2: Solubility Curve for Sodium Nitrate (NaNO3) 2000 1800 1600…

A: This question is based on solubility of sodium nitrate at different temperature.

Q: Which reagent(s) would complete the reaction?

A: We have to select the reagent that will carry out the given synthesis. Introduction: Organozinc…

Q: Choose the reagent(s) that would be most likely to complete this reaction. OsO4 (catalytic) NMO OH

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Q: Decide whether each molecule or polyatomic ion is polar or nonpolar. If the molecule or polyatomic…

A: •Polar molecules :  i) have polar bond.  ii) have asymmetric structure.  •Non - polar molecules :…

Q: eaction at 11.0 °C evolves 769. mmol of sulfur hexafluoride gas. culate the volume of sulfur…

A: Ideal gas equation.    PV = nRT

Q: For both circumstances (reversible and irreversible) what is the change in enthalpy dS for the gas,…

A: To calculate the change in entropy for the gas and the surrounding and the universe for both the…

Q: How many moles of carbon dioxide are produced when 14.1 g of HF are reacted with an excess amount of…

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Q: Which is the reducing agent in the combustion of methanol? CH3OH+02 H₂O + CO₂ O a) 0₂ Ob) H₂0 c)…

A: Oxidation: It involves loss of electrons  Or Increase in the oxidation number. Or Addition of oxygen…

Q: A 62.5 mL sample of a 0.106 M potassium sulfate solution mixed with 39.0 mL of a 0.122 M lead(II)…

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Q: 3) Which of the following is a weak acid? A) H3PO4 B) HNO3 C) NH3 D) OH-

A: Acidity of a acid depends on how much H+ ions it produces after dissolving in water.

Q: In an experiment, 27.5 g of metal was heated to 98.0°C and then quickly transferred to 150.0 g of…

A: we have to determine the specific heat of the metal

Q: Question 1: What alkane is formed when each alkene is treated with H2 and a Pd catalyst? a. CH3 C=C…

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Q: which of the following conformation is highest in energy

A: From the given conformation of 2,3-dimethyl butane. to predict which conformed will have more energy…

Q: 11. sodium phosphide 12. diphosphorus pentoxide 13. potassium nitride 14. sodium oxide 15.…

A: -> Ionic compound is formed due to attraction of cation and anion . -> Ionic bond  is formed…

Q: Carbon monoxide gas is collected at -11.0 °C in an evacuated flask with a measured volume of 25.0 L.…

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Q: 8. a) Circle which of the following is(are) a likely intermediate(s) in the mechanism for the given…

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Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.