8. The unit cell of a compound containing strontium, iron, and oxygen is shown here. (a) What type of lattice does this crystal possess (all unit cell angles are 90°)? (b) What is the empirical formula? (c) Compute the theoretical density of the crystal in g/cm³. -3.47 Å

Q: Nickel metal has a density of 8.909 g/cm^3 and an atomic radius of 124.6 pm. a.) Calculate the…

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Q: s of an unknown crystalline substance showed that it is hard, has a high melting point, and is…

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Q: QUESTION: Calcium forms a face-centered cubic crystalline structure with a density of 1.55 g/cm^3.…

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Q: n its atomic radius equals 0.175 nm.

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Q: calculate the ionic attractive energy between K and O ions per mol of the material.

A: Between  K+ and O2-  ionic bond is formed. Ionic bonds are formed when positively and negatively…

Q: Explain when is the material is homogeneous and isotropic?

A: Homogeneous material: Homogeneous is something that is uniform throughout. A homogeneous material…

Q: A hypothetical element, Ny, forms a face-centered cubic lattice with an atomic radius of 165 pm.…

A: Consider the given information is as follows; Molar mass of Ny (M) = 112.024 g/mol    Face-centered…

Q: In addition to filling in the blanks below, show all of your work for this problem on paper for…

A: The relationship between atomic radius and edge length for face centered cubic units -

Q: a. Choose the complete Lewis structure for the following partially completed Lewis structure. F…

A: Lewis structure is a way of representing the structure of a molecule in which bond pairs (shared…

Q: The density of a metal is 8.92 g/cm3. The metal crystalizes into FCC structure. If the atomic radius…

A: Given  Density of metal ( d ) = 8.92 g/cm3 Crystal type = FCC lattice  atomic radius of metal ( r )…

Q: C60 fullerenes crystallizes into a cubic close-packed structure known as fullerite, with a lattice…

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Q: calculate density in g cm^-3 - molar mass is 200.5 g.mol - simple cubic lattice - radius of 185 pm

A: Given, The radius of atoms, (r)=185 pm. The edge length of the unit cell, (a)=2r=370 pm=3.70×10-8…

Q: 17. Which one of the following substances can be melted without breaking chemical bonds? (a) sodium…

A: Out of all the given choices, only sulfur dioxide can be melted without breaking its chemical bonds.

Q: (a)What is the atomic radius (in nm) of a certain metal particle if it crystallizes with a…

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Q: metallic element, M, has a face-centered cubic lattice structure as a solid. If M has an atomic…

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Q: A body-centered cubic unit cell has a volume of 4.32x10^-23 cubic centimeters. Find the radius of…

A: Given:Volume = 4.32×10-23 cm3

Q: 0.1430 nm and a density of 8.57 g/cm3.

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Q: Estimate the length of the unit cell edge, a, from the atomic radius of Aluminum (1.43 Å).

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Q: If the chemical representation of algae is C109H214086N9P, answer the following questions. (a) (b)…

A: For any given compound of known molecular formula, the mass of a molecule in 1 mol can be determined…

Q: Does sodium hydroxide have higher conductivity or ammonia?

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Q: Lead, Pb, is used in solders as radiation shield. It adopts the face centered cubic unit structure…

A: Given question related to calculation of density of lead.

Q: 5) Calcium has a face-centered cubic structure. If the atomic radius of calcium is 231 pm, calculate…

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Q: e radius of a osr

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Q: please help? make the answer clear

A: Density of aluminum = 2698 kg/m3Cell volume = 6.643×10-23 cm3

Q: Provide complete solution. Determine the planar density of the Mo in (110) given than the atomic…

A: Given, atom = Mo, the indicies (110)

Q: List the major classes of minerals and discuss the main chemical characteristic of each class.

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Q: Mineral A is discovered to be an ionic compound, while Mineral B is a molecular compound. If the…

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Q: Calculate the packing efficiency and density of diamond.

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Q: Briefly explain the difference between particle and crystal size

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Q: An isotropic amorphous vitreous substance (meaning that it has the same refractive index regardless…

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Q: Explain in simplest terms the coordination number of face-centered cubic unit cell

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Q: The density of a metal is 8.92 g/cm3. The metal crystalizes into FCC structure. If the atomic radius…

A: The molar mass can be calculated as :-

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Q: The density of PbSe at room temperature is 8.27 g/cm^3. Calculate the length of an edge of the PbSe…

A: Density of PbSe = 8.27 gcm3

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.