Calculate the number of molecules of sulphur (S8) present in 16 g of solid sulphur.
In this question why do we multiply the avagadro number? We are to find number of molecules, so why we take out moles?????????????? plzzzzzz reply
molecular mass of sulphur s8= 32 (which is atomic mass of s ) x 8
= 256 u
so, one mole of s8 molecule is 256 g and 1 mole of s8 molecule contains 6.022 x 10 exponent 23.
so, no of moles present in 16 g os solid sulphur=
16/256 =0.0625 moles
so, no of molecules present in 16g of s8 = 6.022 x 10 exponent 23 x 0.0625
=0.376375x 10 exponent 23