Q: The below image is an example of what type of unit cell?
A:
Q: How many atoms are in the body-centered cubic unit cell?
A: In BCC unit cell , each corner ( shown by red color ) contributes 1/8 atoms a unit cell consists…
Q: Q3. Calculate the theoretical density for Zinc of HCP crystal structure, the atomic mass = 65.38…
A: The density of zinc can be calculated by using given formula
Q: Both covalent-network solids and ionic solids can havemelting points well in excess of room…
A: a) Since the ionic solids have ions present in it. Hence it is polar in nature due to presence of…
Q: Which of these molecular fragments would you expect tobe more likely to give rise to electrical…
A: Electrical conductivity depends upon flow of electrons or charge separation.
Q: Dispersion forces would be weakest in which of the following substances? A) He B) Ne C) Ar D) Kr E)…
A: The dispersion or London attraction forces are weak attraction forces. These forces depend on the…
Q: In terms of their bulk properties, how do liquids and solids differ? How are they similar?
A: Solids and liquids are among the three state of matter they are different in terms of, the solids…
Q: What is the best description of conductivity? Select one: O The amount of electricity present in a…
A: Conductivity of a substance is the degree to which electricity passes through substance.
Q: a) How many carbon atoms are there per unit cell? b) What is the coordination number for each carbon…
A: (a) number of carbon atom per unit cell (b) coordination number of each carbon atom
Q: Silicon (Si) has the diamond and GaAs has the zinc blende crystal structures. Given the lattice…
A: Given For silicon (Si) has dimond like crystal structure i.e. zinc blend. Therefore, FCC…
Q: Two allotropes of carbon, graphite and diamond, have physical properties very different. Explain…
A: The two different allotropes of carbon have the following properties.
Q: What kind of intermolecular forces act between a dichloroethylene (CH,CCl,) molecule and a…
A: The type of interactions present in the molecules depends on the polarity of the molecule. The C-Cl…
Q: The vapor pressure of water at 25 °C is 23.76 torr. If 1.25 g of water is enclosed in a 1.5-L…
A: First convert unit of vapor pressure of water (P) from torr to 1 atm. P=23.76 torr×1 atm760…
Q: Based on their composition and structure, list in order of (a) increasing molecular forces, (b)…
A: The compounds considered are acetic acid (CH3COOH), methyl acetate (CH3COOCH3) and ethanol…
Q: In an ionic crystal, the cations and anions are held together by which forces?
A: Removal of electron from the atom results to form positively charged ion called cation.Addition of…
Q: At room temperature, F2 and Cl2 are gases, Br2 is a liquid, and I2 is solid. This is because of…
A: At room temperature, F2 and Cl2 are gases, Br2 is a liquid, and I2 is solid because
Q: Which compound would you expect to have greater surface tension: acetone [(CH3)2CO] or water (H2O)?…
A: Surface tension is the property of a surface to resist external force per unit area. It allows the…
Q: In a crystalline solid anions ‘C’ are arranged in cubic close packing, cations ‘A’ occupy 50% of…
A:
Q: What kinds of attractive forces exist between particles (atoms, molecules, ions) in molecular…
A: Intermolecular forces are the forces of attraction or repulsion which act between neighboring…
Q: The strength of dispersion forces as the number of v in the atoms or nonpolar molecules increases.…
A: To complete the given sentence. The strength of dispersion forces ______ as the number of _______ in…
Q: Would you expect London dispersion forces to be more important for Xe or Ne? Why? (The atomic radius…
A: To find: Among Xe and Ne, which has more London dispersion forces.
Q: Name two elements that form molecular crystals, two thatform metallic crystals, and two that form…
A: The definition of crystals is basically any solid made of ions, atoms or molecules, which are…
Q: What are the number of crystalline allotropes of carbon?
A: Properties of some chemical elements to exist in two or more different forms, in the same physical…
Q: Which of the following would you expect to be a molecule and which would you expect to be part of an…
A: Metal and Non-Metal elements are considered to be form ionic solid whereas Non-Metal and Non-Metal…
Q: What kind of intermolecular forces act between an iron(III) cation and a hydrogen peroxide (H,O,)…
A: The kind of intermolecular force acting betwen an iron (III) cation and a hydrogen peroxide molecule…
Q: COMPLETE THE TABLE. QUESTION ANSWER The description of crystaline soliGs trat ditter trom amorphous…
A: Question 1: option 3 is the correct answer. The description of crystalline solids that differ from…
Q: Predict the effect (if any) of an increase in temperature onthe electrical conductivity of (a) a…
A: The tendency of a material to oppose the flow of current through it is called resistivity of the…
Q: One method to synthesize ionic solids is by the heating oftwo reactants at high temperatures.…
A: The balanced chemical equation for the reaction can be written as follows-
Q: Which statement describes ionic crystals?
A: As given crystals are ionic their will be ions and in ions their is strong electrostatic force of…
Q: PLEAS ANSWER 43
A: Water has a high heat of vaporization, the amount of energy needed to change one gram of a liquid…
Q: What is the relationship between density and crystal structure?
A: To find: Relationship between density and crystal structure.
Q: Solid thallium(I) chloride has the same kind of crystal structure as CsCl which is pictured below:
A:
Q: Ionic solids of the O- and O3 - anions do not exist, while ionic solids of the O2 - anion are…
A:
Q: temperature with high melting and high boiling points. However, ionic liquid is a salt that is a…
A: Ionic liquids are pure ionic materials which are liquid at low temperature.These materials are…
Q: Although the H-bonding in hydrogen fluoride is much stronger than that in water yet water has a much…
A: H-bonds and their presence in biological and physical systems play a significant role. For example,…
Q: Imagine the primitive cubic lattice. Now imagine grabbingthe top of it and stretching it straight…
A: Since all the angles are still 90 degree and two sides are same just a third side is different…
Q: Which liquid is more viscous: octane, C8H18, or motor oil, C18H38? Explain.
A: Viscosity is a measure of a fluid's resistance to flow. It describes the internal friction between…
Q: In which direction along the periodic table does thermal conductivity generally increase?
A: Thermal conductivity does not show regular increase or decrease in periodic table.In every group and…
Q: 5- In Non-Crystal solid the distance between atoms that the size of hard sphere Can Biggers All…
A: Ans) Cannot be smaller
Q: Given that mercury has DeltaHvap of 59.11 kJ/mol and its normal bp is 356.7°C, calculate the vapor…
A:
Q: One method to synthesize ionic solids is by the heating of two reactants at high temperatures.…
A:
Q: In a liquid, the tendency of liquids to minimize their surface area is called capillary action O…
A: Here, we have to find the term which defines the tendency of liquids to minimize their surface area.
Q: State two molecular characteristics of substances that typ-ically form liquid crystals. How is each…
A: Given: To determine the two molecular characteristics of substances that typically form liquid…
Q: As the temperature increases, do you expect the surface tension ofa liquid to increase, decrease, or…
A: The temperature is inversely proportional to the surface tension.
Q: At high altitudes the vapor pressure is than at the sea level. O higher O lower O remains the same
A:
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Solved in 3 steps
- Which solid phase that is, which allotrope of carbon is more stable, graphite or diamond? You should consult some of the tables in the thermodynamics section of this text.. Both solid phases exist under normal conditions of pressure and temperature. Explain why this is so, given that one solid phase is more thermodynamically stable than the other. Do their unit cells provide any suggestion for their relative stabilities?For a simple cubic lattice, what is the ratio of the d spacings for the (100), (110), and (111) planes?In the process of doping a semiconductor, certain impuri-ties are added to increase its electrical conductivity. Explain thisprocess for an n-type and a p-type semiconductor.
- Aluminium (Al) has a face-centered cubic structure, with lattice parameter a = 4.05 × 10−10 m. Ifeach Al atom loses three electrons to make a free electron gas in the metal, what is the electrondensity ne?A sample of an alkali metal that has a B.C.C unit cell is f0und t0 have a mass of1.000 g and a volume of 1.0298 cm3. When the metal reacts with excess water, thereaction pr0duces 539.29 mL of hydrogen gas at 0.980 atm and 23°C. Identify themetal, determine the unit cell dimensions, and give the appr0ximate size of theatom in nanometers.The experimentally determined density of a material is lower than expected based on the arrangement of the atoms in the unit cell, the formula mass, and the size of the atoms. What conclusion(s) can you draw about the material?
- Two patterns of packing two different circles of the samesize are shown here. For each structure (a) draw the twodimensionalunit cell; (b) determine the angle between thelattice vectors, g, and determine whether the lattice vectorsare of the same length or of different lengths; (c) determinethe type of two-dimensional lattice.If you want to determine the glass transtion tempreture (Tg), softening point (Ts), melting point (Tm) and crystallization temperatures (Tc) of the glass-ceramics which characterization techniques can be used? Plase expain in details.what are antiferromagnetic and ferromagnetic solids?
- Lattice parameters of α and β phases were calculated from x-ray diffraction measurements performed in A-B alloys with different compositions, all quenched from 500, 600 and 700 °C. Draw a schematic A-B phase diagram using this informationThe electronic structure of a doped semiconductor isshown here. (a) Which band, A or B, is the valence band?(b) Which band is the conduction band? (c) Which regionof the diagram represents the band gap? (d) Which bandconsists of bonding molecular orbitals? (e) Is this an exampleof an n-type or p-type semiconductor? (f) If the semiconductoris germanium, which of the following elementscould be the dopant: Ga, Si, or P?The electronic structure of a doped semiconductor isshown here. (a) Which band, A or B, is the valence band?(b) Which band is the conduction band? (c) Which regionof the diagram represents the band gap? (d) Which bandconsists of bonding molecular orbitals? (e) Is this an exampleof an n-type or p-type semiconductor? (f) If the semiconductoris germanium, which of the following elementscould be the dopant: Ga, Si, or P? [Section 12.7]