jonrare
jonrare
26-09-2016
Chemistry
contestada
How many atoms are in 149 g of calcium?
Respuesta :
Willchemistry
Willchemistry
27-09-2016
Atomic mass Calcium =>
40.078 u.m.a
40.078 g --------------------- 6.02x10
²³ atoms
149 g ------------------------ ?? atoms
149 x ( 6.02x10²³) / 40.078 =>
2.23x10²⁴ atoms of Ca
hope this helps!
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