Răspunsuri

2014-06-11T08:44:10+03:00
 M_{H2O} =18 g/mol
Deci m de substanta in 3 moli=18x3=54
pai asa de-a dat la test pur sdi simplu calculeaza masa de substanta din 3 moli H2O
2014-06-11T08:56:26+03:00

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

M H2O=2+16

M H2O=18g/mol

m=3*18

m=54 g