Question

Calculați raportul nr de atomi si masa moleculara și masa de atom
-carbonat de aluminiu
-apa
- acid fosforic
Va rog frumos!!!!ajutorrrr

Answer 1

Al2(CO3)3

raport  atomic=r.a.=2Al:3C:9O=2:3:9

raport de masa=r.m.=2AAl:3AC:9AO=2.27:3.12:9.16=54:36:144=3:2:8
                                                                                      se simplif. cu 18

M=54+36+144=234                             234g------1 mol


H2O
r.a.=2H:O=2:1
r.m.=2AH:AO=2:16=1:8

M=2+16=18                          18g-------1mol


H3PO4
r.a.=3H:P:4O=3:1:4

r.m.=3AH:AP:4AO=3:31:64

M=3+31+64=98                 98g------------1mol