Question

Va rog, este urgent. ​Dacă nu înțelegeti ceva îmi puteti spune.Dau coroana

Answer 1

Răspuns:

Explicație:

AMg =24.78,6:100 + 26.11,3: 100  

         18,864 +2,938=21,802

a.

1mol Mg= 24g/moli

n= m : M

m=n . M

0,5moli H2---------> m = 0,5moli.2g/moli  =     1g H    

15moli Ca----------> m=    15moli.40g/moli= 600gCa      

10 kmoli O2---------->  m= 10000moli . 32g/moli = 320000 g O      

b.

1mol de atomi de S----------6,023.10²³ atomi S

xmoli------------------------------60,23.10²³ S

x =  n= 60,23.10²³ : 6,023.10²³=10 moli  S

m= 10moli . 32g/moli = 320g S

24,092.10²³ Cu--------> n= 24,092 .10²³ : 6,023.10²³ = 4moli Cu

m= 4moli . 64g/moli = 256g Cu    

c.

12g Mg -----> n= 12g : 24g/moli= 0,5moli Mg

24g C-----> n= 24g : 12g/moli= 2moli C

0,6023.10²³ Na------> n= 0,6023.10²³ : 6,023.10²³= 0,1moliNa

6,023.10²³ Al----------> 6,023.1 0²³   : 6,023.10²³   =1mol Al