Question

DAU COROANA URGENT AAAAAAAAAAAAAAAAAAAAAAAA

Answer 1

Răspuns:

Explicație:

==>2 moli HCl

n= m : M

m=n .M

MHCl= 1+ 35,5=36,5------->36,5g/moli

m= 2moli . 36,5g/moli = 73 g HCl

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

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

0,5 moli de atomi Mg--------------------x

x= 0,5  .  6,023.10²³ atomi Mg =3,0115 .10²³atomi Mg

==> n = 18,06 .10²³  : 6,023 .10²³ =2,99 =3 moli Au

==>n = m : M

MH3PO4=3+31 + 4.16=98------>98g/moli

n= 490g ; 98g/moli=5 moli H3PO4