Question

In cati moli de apa se gasesc 10g de hidrogen ? Multumesc!

Answer 1

H2O
MH2O=2+16=18

18 g H2O-------2 g H2
X g H2O-------10 g H2
X=18.10:2=90 g H2O

1 mol H2O----18 g H2O
Y moli H2O----90 g H2O
Y=90:18=5 moli H2O

Answer 2

M H₂O=(2*1)+16= 18g/mol

18g apa.........................2gH
X.......................................10g H
X=18*10/2=90g H₂O
numar moli  n=m/M,  n=90gH₂O/MH₂O
n= 90/ 18= 5moli  H₂O