Question

Ce cantitate de oxid de calciu (in moli si grame) se obt prin arderea a 8 moli de calciu

Se dau =Aca =40, A0=16

Answer 1

Răspuns:

Explicație:

2Ca + O2 → 2CaO

8 moli.............x moli

${\displaystyle \mu }_{CaO} ={\displaystyle \mu }_{Ca} +{\displaystyle \mu }_{O} = 40+16=56 g/ mol$

x= $\frac{8*2}{2} =8 moli$

${\displaystyle \nu }=\frac{m}{{\displaystyle \mu }}$

m=${\displaystyle \mu }*{\displaystyle \nu }$

m=56*8

m=448 g

Se obtin 8 moli de CaO prin arderea a 8 moli de Ca pur

Se obtin 448 g de CaO prin arderea a 8 moli de Ca pur