Question

Find the number of atoms in the following:

a. 0.5 mole of C atom

b. 2 mole of N atom​

Answer 1

0.5 ×6 .022×10^23

=3. 011×10^23

b.2×6.022×10^23

=12.044×10^23

Answer 2

One mole of a substance is defined by Avogadro as consisting of 6.022 x 10^23 atoms. This is Avogadro's number. To calculate the number of atoms in two moles of sodium, use dimensional analysis. 2.0 moles N x 6.022×10^23g1mol=1.20×10^24 atoms of N.