Question

Cati atomi si ce masa de Mg se gasesc in 3 moli
12Mg?
24

Sa se calculeze si particulele sub atomice ( protoni , neutroni si electroni) se gasesc in cei 3 moli de Mg?

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Answer 1

Răspuns:

Explicație:

3moli Mg

n=m : M         n=nr. moli      m=masa subst.      M =masa molara

m= n. M

m=3moli .24g/moli=72g Mg

1mol Mg--------24 g Mg---------6,023 .10²³atomi Mg

Mg    Z=12   A=24------> 12p , 12e 12n

1mol Mg ----12 . 6,023 .10²³ protoni-----12.6,023.10²³electroni---12. 6,023.10²³n

3moli Mg -------x---------------------------------y ---------------------------------z

x=3 . 12 .6,023.10²³ p =216,828.10²³   p

y= 3.12 .6,023.10²³  e

z=3.12 .6,023 .10²³    n