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Cati atomi se gasesc in 80 grame de potasiu

Răspuns :

Răspuns:

M(K) = 39 g/mol

n = m/M = 80/39 = 2, 05 moli K

n = 2,05 × 6,022 ₓ 10²³ atomi

= 12,3451 ₓ 10²³ atomi

= 1,23451 ₓ 10²⁴ atomi