Question

9. 56g nitrogen is taken. (atomic mass-14)
(a) Calculate the number of moles of nitrogen molecules present in it.
(b) Calculate the number of atoms​

Answer 1

Answer:

a) 0.34 moles b) 4.09*10²³ atoms

Explanation:

a) no. of moles=given weight/molecular weight

=9.56/28

=0.34 moles

b) no. of atoms=no.of molecules*total no. of atoms

=moles*NA*total no. of atoms

=0.34*6.022*10²³*2

=4.09*10²³

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