Question

Buna!Ma poate ajuta cineva,va rog?
Zi faina❣​

Answer 1

Răspuns:

Explicație:

CaSO4

A.

r.a.= 1 : 1 :4

B.

r.m.=40 : 32 : 4.16

     =40 : 32 : 64      se simplif. cu 8

      =5 : 4 : 8

C.

M= 40+ 32+ 64= 136 -------->136g/moli

D.

136g CaSO4-------40g Ca-------32 g S ---------64 g O

100g CaSO4-----------x----------------y-----------------z

x= 100 .40 : 136= 29,41 % Ca

y=100.32 : 136=23,53 % S

z= 100. 64 : 136=47,06 % O

E.

n= m : M

m= n . M

m=4moli . 136g/moli=544 g CaSO4

F.

136g CaSO4--------64 g O

xg------------------------80gO

x= 136 .80 : 64=170 g CaSO4

n=170g : 136g/moli =1,25 moliCaSO4

g.

136gCaSO4----------64 gO

600g---------------------y

y=600 .64 : 136= 282 , 35 gO

n=282,35g : 32g/moli=8,82 moliO2

H.

n= 80g : 136g/moli=0,59 moliCaSO4

1molCaSO4---------6,023.10²³moleculeCaSO4

0,59moli-------------------------z

z= 0,59  . 6,023.10²³ molecule=