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Bohr's Model of a Hydrogen Atom

Atomic mass o...

Question

Atomic mass of an element is 36, what will be the mass of an unit cell if it crystallizes as face centered cubic unit cell?

A

236 x10 ^-23 g

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B

23.9 x10 ²³g

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C

25.36 x10 ^-23 g

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D

2.36 x10 ^-23 g

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Solution

The correct option is B
23.9 x10 ²³g

FCC has 4 atoms so mass of four atoms = 36 x 4/6.022x10 ^-23= 23.9 x10 ²³g

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