Question

cati atomi se gasesc in: a.10g calciu,b.12,7g iod, c.0,5 moli plumb,d.0,25 moli zinc​

Answer 1

Răspuns:

Explicație:

a.

10 g Ca

n= 10g  : 40g/moli= 0,25 moli de atomi de Ca

1mol Ca ------6,023.10²³ atomi Ca

0,25 moli Ca------------x

x= 0,25 . 6,023 .10²³ atomi Ca

b.

n= 12,7 g : 127g/moli= 0,1moli de atomi   de iod

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

0,1 moli---------------------------------x

x= 0,1 . 6,023.10²³atomi iod =

c.

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

0,5 moli ---------------------------------x

x= 0.5 . 6,023.10²³atomi Pb =

d.

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

0,25 moli---------------------------------x

x= 0,25 . 6,023 .10²³atomiu Zn =