Question

1 sulphur molecule is known to be composed of 8 atoms of the element. In a sample of 192 g of pure sulphur calculate
A) no. Of g_atoms of sulphur
B) no. Of atoms of sulphur
C) no. Of moles of sulphur
D) no. Of molecules of sulphur


Plzz solve this question step by step

Answer 1

Answer:

no.of molecules of Sulphur

192/8

=24 molecules

Answer 2

Given :

Weight of sulphur = 192 g

To find :

a)Number of gram atoms of sulphur

b)Number of atoms of sulphur

c)Number of moles of sulphur

d)Number of molecules of sulphur

Solution :

• a) No of gram atoms = Given mass / molar mass

                                  = 192 / 32   =6

       Number of gram atoms of sulphur is 6

• b) No of atoms = 6×Nₐ

                                  = 6×6.023×10²³

                                  =36.12 ×10²³

       Number of atoms of sulphur is 36.12 ×10²³

• c) No of moles of sulphur = Given mass / Moleular mass

                                          = 192 /(32×8)   =0.75 moles

       Number of moles of sulphur is 0.75 moles

• d) No of molecules of sulphur = 0.75×6.023×10²³

                                                 = 4.515×10²³

       Number of molecules of sulphur is 4.515×10²³