Mg+2HNO3---> Mg(NO3)2+H2
M Mg= 24
M HNO3 = 63
a) Pe reactie :96/24=x/63 <=> 4=x/63 => x=4*63 =252 g HNO3 ( md )
C= md/ms *100
33=252/ms*100
33=25200/ms
ms=25200/33 = 763,63
b) M Mg(NO3)2 = 24 + 62*2 = 24 + 124 = 148
Pe reactie : 96/24 = y/148 => 4=y/148 => y=4*148 = 592 g Mg(NO3)2