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Molecular Geometry

For each molecule, draw the Lewis structure first, then apply the VSEPR model according to the following rules: 1. Count the number of electron pairs around the central atom (both bonding pairs and unshared pairs). Treat double and triple bonds as if they were single bonds. 2. Refer to the table given below to predict the geom

A complete molecular diagram fo C2 2- and determine the bond order.

The problem to solve is to formulate in which way two carbon atoms are described by using atomic orbitals. First one has to find out the electronic structure of a carbon atom by locating this element in the periodic table. Second step is then to fill the orbitals with the given number of electrons using Hund's rule. The third

General Chemistry

4.81 Which of these aqueous solutions would you expect to be the best conductor of electricity at 25° C? Explain your answer? (a) 0.20M NaCl (b) 0.60M CH3COOH (c) 0.25M HCl (d) 0.20M Mg (NO3)2

Multiple Choice Questions

6 ) Iron has a density of 7.86 g/cm3. The volume occupied by 55.85 g of iron is: 7 ) Which pair of elements would be most likely to form an ionic compound? P and Br Cu and K C and O O and Zn Al and Rb 8 ) Which is the formula for the binary compound of potassium and nitrogen? KN K2N NK2

Epitaxy, Berry's Rotation, Polarization, IR spectroscopy, Rochow

This is a past exam for practice. Please complete question 5 only. 20 5. Write brief notes on any four of the following: a. Metal-organic vapor phase epitaxy b. Berry's rotation. c. Effect of polarization on melting points d. IR spectroscopy as a tool for structure determination of inorganic compounds e. Rochow pr

Multiple choice

Out of 250 questions, I am unsure of the following: 1.For a given substance that exhibits liquid-crystalline properties, the transition from solid to liquid-crystal state occurs: a.over a range of temperatures that includes the melting point of the soild. b. at a well defined temperture above the melting point of the solid.

Bonding in Co-Ordination chemistry

How is it possible that [Co(h20)6]3+ will oxidize water but [Co(Nh36]3+ is stable in aqueous solution? Both are mondentate ligands. I thought the proximity of the nitrogens after one has bonded to the cobalt would make it more likely to react, because the entropy would be lowered. They are also both low spin complexes.

Structures of Solids

My professor gave us this and told us that some of these problems will be on our test. I just want to make sure I know how to do all of them correctly. Thanks! 1. When describing structures of solids, especially ionic solids, structure types are typically associated with the structures of well-known species. If a system we

Determining hybridization and molecular shape

1.)For each of the following covalent compounds deduce their molecular shape and the possible hybridization of the central atom: a.) indium(I)iodide b.)tin(II)bromide c.)antimony tribromide d.)tellurium tetrachloride e.)iodine pentafluoride 2.) Determine the electron pair arrangement and the molecular shape according to

Bond Order, Bond Angles and Electron-Dot Diagrams

1) Assuming that it has similar molecular orbital energies to those of carbon monoxide, deduce the bond order of the NO+ ion. 2) construct electron-dot diagrams for a) oxygen difluoride b) phosphorus trichloride c) xenon difluoride d) tetrachloroiodate ion, ICl4^- 3) Construct an electron-dot diagram for th

Molecule Shapes

What shape do you expect for molecules that meet the following descriptions? a) A central atom with two lone pairs and three bonds to other atoms. b) A central atom with two lone pairs and two bonds to other atoms. c) A central atom with two lone pairs and four bonds to other atoms.

Structure of Ice Diamond Compared

Compare the structure of ice with the structure of diamond. If you rotate the structures just right, you will see distinct similarities, namely sp3 hybridization (of owygen and carbon, respectively) and the hexagonal arrangement of atoms. Given this similarity, explain why ice can be melted by applying pressure whereas diamond

Lidocaine Problem

Lidocaine is thought to bind to receptors in its methylated form above. Identify in writing the atoms or groups in the above compound that could be involved in its binding to a receptor via... (See attachment for full question).


State the type of bonding that is present in barium chloride,BaCl2(2 should be subscript- low down , can't do it in this program), giving your reasons in two or three senttences, using arguments based on electronegatives. Also, give an explanation using electron stuctures, of the way in which the type of bonding explains the

Four compounds have the formula C4H8O, identify possible compounds.

Four compounds have the formula C4H8O. Identify possible compounds (by name or structure). Compounds A and C have similar boiling points; Compounds B and D have significantly lower boiling points than A and C. A Reacts with oxidizing agents; reacts immediately with bromine; negative Iodoform Test; negative Lucas Test. B

Pi bonding, temperature volume

1) Two flexible containers for gasses are the same temperature and pressure. One holds .50 grams hydrgen and the other 8.0 grams of oxygen. Which of the following statements regarding these gas samples is false? a) the volume of the hydrogen container is the same as the volume of the oxygen container b) the number of mol

Chemical Bonding

I have been having trouble figuring out how to do problems 8-10 in the attachment below. I completed the problems, but I would like to make sure that I have the correct answers and that I understand the solutions to the problems.

Band Structure Diagrams

See attached problem. I am having trouble on all parts of the problem. Any assistance would be appreciated.

Chemistry Problem Set: Half-Reactions

Please see the attached file for full problem description. 2. Which half-reactions represent oxidation and which reduction? Explain your reasoning. 2+ - a. Fe --> Fe + 2 e 4+ _ 2+ b. Ni + 2 e --> Ni - - c

Compounds & Structural Formulas, etc.

Please see the attached file for full problem description. A popular brand of low-fat shredded cheddar cheese advertises that it provides 1.5 g of fat with 15 Calories from total fat per serving. There are 50 Calories per serving and of the total fat, 1.0 g is saturated fat. A serving is defined as ¼ cup or 28 g. Is this "lo

Density, Conductivity, Coal-Combustion Calculations

Question 15: The density of liquid water at 0 degrees C is 0.9987 g/cm cubed; the density of ice at this same temperature is 0.917 g/cm cubed. a. Calculate the volume occupied at 0 degrees C by 100. g of liquid water and by 100. g of ice. b. Calculate the percentage increase in volume when 100. g of water freezes at 0 degree