a fost răspuns

Calculaţi masa moleculară pentru:

1) Acid clorhidric: HCl;

2) Carbonat de calciu: CaCO3;

3) Molecula de oxigen:O2;

4) Fosfat de calciu: Ca3(PO4)2

Răspuns :

Sebinsky2015ask

[tex]M_{HCl}=M_{H}+_{Cl}=1+35,5=36,5\\M_{CaCO3}=M_{Ca}+M_{C}+3M_{O}=40+12+48=100\\M_{O2}=2M_{O}=2*16=32\\M_{Ca_{3}(PO4)_{2}}=3M_{Ca}+2M_{P}+8M_{O}=120+62+128=310[/tex]

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