kymcar97
kymcar97
14-09-2016
Chemistry
contestada
How many atoms are in 121 g of calcium?
Respuesta :
Willchemistry
Willchemistry
14-09-2016
Atomic mass Ca = 40.078 u.m.a
40.078 g --------------- 6.02x10²³ atoms
121 g ------------------- ??
121 x ( 6.02x10²³) / 40.078 =
7.28x10²⁵ / 40.078 =
1.81x10²⁴ atoms
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