akaylatatenbach
akaylatatenbach
31-08-2016
Chemistry
contestada
How many atoms is 50 g of He?
Respuesta :
Willchemistry
Willchemistry
01-09-2016
Atomic
mass He = 4.002 u.m.a
4.002 g --------------- 6.02x10
²³ atoms
50 g ------------------ ? atoms
50 x ( 6.02x10²³) / 4.002
= 3.01x10²⁵ / 4.002
=
7.52x10²⁴ atoms of He
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