Respuesta :

no of atoms=mass in grams×6.02×10²³/atomic mass
mass in grams= no of atoms of neon×atomic mass/ 6.02×10²³
mass in grams= 1.01×10²²×20/6.02×10²³
mass in grams=2.02×10²³/6.02×10²³
mass in grams=0.3355 grams