1.
2.45g xL
2KCLO3=2KCl+3O2
245g 67.2L
x=2.45*67.2/245=0.672L
2.
nCO=m/M=0.2g/30g/mol=0.006mol
N=n*Na=0.006*6*10(23)=36*10(26)
3.
Mgasa=D(N2)*M(N2)=2.5*28=70g/mol
ngasa=V/Vm=66.7L/22.4L/mol=2.9mol
mgasa=n*M=2.9mol*70g/mol=203g
4.
3.88g xL
2ZnS+3O2=2ZnO+2SO2
194g 67.2L
x=3.88*67.2/194=1.344L