Răspuns:
M,H2O= (2gH+16gO)=>18g/mol
18g apa..........16gO
1g......................x=.16/18...........................calculeaza
M,CO2= (12gC+32gO)=>44g/mol
44g CO2............32gO
1g.........................y=.32/44..............................calculeaza
CALCULEAZA si compara x cu y !!!!!
Explicație: