Platinum nanoparticles of diameter ∼2 nm are important catalysts in carbon monoxide oxidation to carbon dioxide. Platinum crystallizes in a face-centered cubic arrangement with an edge length of 3.924 Å. (a) Estimate how many platinum atoms would fit into a 2.0-nm sphere; the volume of a sphere is 14>32pr3. Recall that 1 A ° = 1 * 10-10 m and 1 nm = 1 * 10-9 m.

Q: Platinum nanoparticles of diameter ∼2 nm are important catalysts in carbon monoxide oxidation to…

A: Given: Platinum nanoparticles of diameter, d=2 nm edge length of face-centered cube, l=3.924 Å…

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A: The solution is given below -

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Q: A (made-up) metal has a face-centered cubic crystal structure. Its density is 20.5 g/cm 3. Its molar…

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A: Given;

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A:

Q: Platinum nanoparticles of diameter ∼2 nm are importantcatalysts in carbon monoxide oxidation to…

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Q: Which solid would you expect to have the highest melting point?(a) MgO(s) (b) I2(s) (c) Kr(s)?

A: The melting point of a substance depends upon the type of bonds present in the substance. If there…

Q: A (made-up) metal has a face-centered cubic crystal structure. Its density is 20.5 g/cm 3. Its molar…

A: Given: Density of metal = 20.5 g/cm3. The lattice structure of the metal is FCC. And the molar mass…

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A: (a) For face-centered cubic crystal lattice, the relationship between radius and edge length is…

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A: (a) Solution -

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A:

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A: For Sodium:- m = 23g/mol     = 0.023kg/mol Na = 6.022 x 1023 a = 0.424nm = 4.24 x 10-10m

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A:

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A: Dear Student

Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.