Question

calculate
a) The mass of one atom of chlorine
b) the mass of one molecule of chlorine
c) the mass of one mole of chlorine

Answer 1

Hey,

you might be knowing that atomic weight of chlorine is 35.5.

atomic weight means weight of 1 mole.

so, weight of 1 mole of chlorine is 35.5

1mole contains,
$6 \times 10 ^{23}$
molecules..

so, weight of 1 atom is
$5.9 \times 10 {}^{ - 23} gms$
one molecule contains 2 atoms of chlorine

so,
$weight \: of \: a \: chlorine \: molecule \: = weight \: of \: chlorine \: atom \times 2$

$weight \: of \: chlorine \: molecule = 5.9 \times {10}^{ - 23} \times 2$

$weight \: of \: a \: chlorine \: molecule = 11.8 \times {10}^{ - 23}$

HOPE THIS HELPS YOU.