a) calculate the number of atoms in 52 unit of helium
b)calculate the mass of 1 atom of carbon 14
c) In 3 moles of ethane , calculate number of moles of carbon
  PLEASE EXPLAIN BRIEFLY
 

Asked by ppratim02 | 29th Apr, 2015, 09:32: PM

Expert Answer:

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Solution for your first query,
4 units of He corresponds to 1 mole He
Hence, 52 units of He corresponds to 13 moles of He
Now, 1 mole He contains 6.023 x 1023 atoms
Hence 13 moles He contains 13 x 6.023 x 1023 atoms
= 78.3 x 1023 atoms
 
 
 
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Topperlearning Team.

Answered by Prachi Sawant | 2nd May, 2015, 05:12: PM