Question

The number of atoms present in 7 gm of silicon

Answer 1

Explanation:

moles present in 7gm of silicon

moles=mass of substance/molar mass

moles=7/28

moles =1/4 or .25

no.of atoms=moles*avogadro's constant

=.25*6.022*10²³

= 1.5055*10²³