Cum aflu masa moleculara pentru:
Na2O - oxid de sodiu
AlCl3-clorura de aluminiu
Al2S3-sulfat de aluminiu
H2Co3-acid carbonic
H2So4 -acid sulfuric ( vitriol)
HNo3- acid azotic ( apa tare)
Ca(OH)2- hidroxid de calciu
CaO - oxid de calciu
NH3- amoniac
CH4- metan

1

Răspunsuri

2014-03-31T19:28:47+03:00
Na2O
M Na2o=Ana+2Ao+22+2x16+22+32+54g+1 mol
AlCl3
M AlCl3+Aal+3Acl+26+3x35+26+105=131g=1 mol
Al2S3
M Al S3=2Aal+3As=2x26+3x32=52+96=148=1mol
H2Co3
M H2Co3=2Ah+3Aco=2x1+12+3x16=62=1mol
H2So4
M H2So4=1Ah+As+4Ao=2+32+4x16=2+32+64=98g=1mol
Hno3
MHno3=Ah+An+3Ao=14+3x16=15+48=63g=1mol
Nh3
MNh3=An+3Ah=14+3x1=17g=1mol
Ch4
MCh4=Ac+4Ah=12+4x1=16g=1mol
1 5 1