Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  AIMS  >>  Class12  >>  Chemistry  >>  Solid State
0 votes

potassium crystallizes in a bode centred cubic lattice .What is the approximate number unit cells in 4.0 g of potassium ? Atomic mass of potassium =39.

$(a)\;3.09 \times 10^{22}\qquad(b)\;3.09 \times 10^{2}\qquad(c)\;2.05 \times 10^{22}\qquad(d)\;1.09 \times 10^{22}$

Can you answer this question?

1 Answer

0 votes
Answer : $3.09 \times 10^{22}$
Explanation :
No of atoms per unit $=8 \times \large\frac{1}{8}+\normalsize 1=2$
No of atoms is 4.0 g of potassium $\;=\large\frac{4}{39} \times \normalsize 6.023 \times \normalsize10^{23}$
No of unit cells in 4.0 g of potassium $\;=\large\frac{4}{39} \times \large\frac{6.023 \times 10^{23}}{2} $= $3.09 \times 10^{22}$
answered Jun 7, 2014 by yamini.v

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App