Question

S
Example 3.4 Calculate the mass of the
following:
(i) 0.5 mole of N, gas (mass from mole
of molecule)
(ii) 0.5 mole of N atoms (mass from
mole of atom)
(iii) 3.011 x 1023 number of N atoms
(mass from number)
(iv) 6.022 x 1023 number of N,
molecules (mass from number)​

Answer 1

Answer:

(i) Mass of N

2

= Moles of N

2

× Molecular weight of N

2

=0.5×28=14 g

(ii) Mass of N− atom = Moles of N− atom × Molecular weight of N− atom =0.5×14=7 g