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Calculati cantitatea de carbon din 124 g H2CO3 acid carbonic

Răspuns :

[tex]M_{H_2CO_3}=2+12+48=62g/mol \\ \\ 62g \ H_2CO_3...............12g \ C \\ \\ 124g \ H_2CO_3...............xg \ C \\ \\ x=\frac{124\times 12}{62}=24g[/tex]