Question

The atomic weight of neon is 20.1797 grams. What is the mass, in grams, of a neon sample that contains 1.00 x 10²⁰ neon atoms?
a ) 1.66 x10⁻⁴
b ) 2.02 x10⁻¹⁹
c ) 298
d ) 3.35 x10⁻³
e ) 8.33 x 10⁻⁶