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cum se calculeaza masa de substanta din 3 moli  H2O


Răspuns :

[tex] M_{H2O} [/tex]=18 g/mol
Deci m de substanta in 3 moli=18x3=54

M-masa moleculara
M H2O=2*1+16

M H2O=2+16

M H2O=18g/mol

m=3*18

m=54 g