Question

lear Medical (2019-2021)
(CHEM
Each molecule of a tear gas contains 2 atoms of
hydrogen 1.78 x 10-22 gm chlorine, 2 carbon atoms
and 1.25 x 10-22 gm of an unknown metal. Its
molecular weight will be
(1) 178
(2) 208
(3) 245
(4) 342​

Answer 1

Answer:

2).208

Explanation:

1amu- 1.661×10^-24

2H atoms=2×1.661×10^-24

=3.322×10^-24

2C atoms =2 ×12 ×1.661 ×

10^-24

=39.804×10^-24

unknown atom weight=125×10^-24

Add all the weight,

weight of molecule =346.180×10^-24

mass of single molecule=346.180×10^-24÷1.6661×10^-24

=208.42amu