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CBSE Class 12-science Answered

Can you tell me how to calculate density of a cell using log???(please give an example)
Asked by rakshitreshu1997 | 30 Oct, 2014, 12:28: AM
answered-by-expert Expert Answer

An element crystallises in a structure having a fcc unit cell of an edge 200 pm. Calculate its density if 200 g of this element contain 24 x 1023atoms.

Solution:

Length of edge, a = 200 pm = 200 x 10-12 m = 200 x 10-10 cm

Volume of unit cell = (200 x 10-10)3 = 8 x 10-24 cm3

Mass of unit cell = No.of atom is unit cell x mass of each atom

The element has fcc arrangement, the number of atom perunit cell z = 4

 

Answered by Vaibhav Chavan | 31 Oct, 2014, 04:26: PM

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