Question

1)In ce cantitate de amoniac se gasesc 4,48l H?
2) Cate grame de hidrogen se gasesc in 67,2l metan?

Answer 1

4,48 l H2                Se transforma volumul de H  in grame .
? g NH3                  4,48 l inseamna volum molar
                                4,48 :22,4=0,2 moli H2
                                0,2 .2=0,4 g H2
                               MNH3=14+3=17
                              17 gNH3---------3 gH2
                                  XgNH3--------0,4gH2
                                   X=17.0,4:3=2,26 gNH3


67,2 l CH4                MCH4=12+4=16
? gH2                     Se transf. V de CH4 in grame
                                   67,2 :22,4=3 moliCH4
                                  16gCH4-----1 molCH4
                                    X g ---------3 moliCH4
                                      X=16 .3=48 g CH4
               
                              16 g CH4-------4gH2
                                48 gCH4------Y gH2
                               Y=48.4:16=12 g H2