Question

Calculate the number of grams present in 100 atoms of aluminum?

Answer 1

1 mole Al= 27gm

6.022X10^23 atoms of Al=27 gm

1 atom Al=( 27/6.022X10^23)gm

100 atom Al= (27/6.022X10^23) X 100 gm

= 4.4835 X 100 X 10^-23

= 4.4835X( 10^-21) gram====>>answer