Question

Calculate no. Of oxygen molecules whose weight is equal to weight of 20 molecules so3

Answer 1

Here goes your answer

Weight of one SO3 molecule=32+3(16)

=32+48

=80

Weight of 20 molecules of SO3=20×80

=1600u

Weight of each molecule of oxygen=2×16=32u

No of oxygen molecules that make up to the weight of 20 molecules of SO3 are = 1600/32

=50

◆50 molecules of oxygen