Question

E TEST AJUTOR RAPID, DAU COROANA

Answer 1

Mg(OH)2

Raport atomic=r.a.=1Mg:2O:2H=1:2:2

Raport de masa=r.m.=AMg :2AO:2AH=24:2.16:2=24:32:2=12:16:1

Compoz. proc. prin raport de masa

M= 24+32+2=58

58g Mg(OH)2---------24 g Mg-------32g O-----------2g H
100 g-----------------------x----------------y------------------z

x=100.24:58=41,37 la suta Mg
y=100.32:58=55,17 la suta O
z=100.2:58=3,44 la suta H





g H                                  MH2SO4=2+32+4.16=98
gS
392 g H2S04                  98 g H2SO4-----------2g H---------32g S
                                       392g H2SO4-------------X-------------Y

                                      X=392.2:98=8 g H

                                      Y=392.32:98=128 g S