Jawabanmu

2014-09-14T03:30:25+07:00
NHO2= O=-2 O2=-2*2=-4 H=+1 N+1-4=0 N=+4-1 +3 N2 biloknya 0 NaNO3 Na=+1 O3=-2*3=-6 N+1-6=0 =+5