Question
Mon February 11, 2013 By:
 

calculate the no. of atoms in the following: 1. 16u of he 2. 16g of he

Expert Reply
Tue February 12, 2013
1 mole contains 6.022 x 1023 molecules 

 atomic mass of helium=4u
so,  16u/4u =4 molecules
 
 
 
The molar mass of He is 4 . so 16g=4moles and 4  x 6.022 x 1023=2.049  x 1023 molecules
Mon March 13, 2017

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