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Compozitia procentuala la Na2Co3 va rog frumos !!!!!!!!!!!!!!!!!!!

Răspuns :

M Na2 Co3=23*2+12+48=46+60=106
106g Na2 Co3...............46gNa..............12g C................60gO
100g.................................X......................Y......................Z
X=100*46/106=....%Na
Y=100*12/106=....%C
Z=100*60/106=.....% O
Na2Co3=23-14 ar 34-14 Na3 = 23