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Calculați masa moleculara :
acid sulfuric
hidroid de calciu
oxid de aluminiu
clorula de magneziu


Răspuns :

H2SO4

MH2SO4=2+32+4.16=98

Ca(OH)2

M=40+2.16+2=74

Al2O3

M=2.27+3.16=54+48=102

MgCl2

M=24+2.35,5=24+71=95