Fe O + 3CO = 2Fe + 3CO 2 3 2 160 256 1500 x 160 1500 = 2 56 x 2 = 56 1500 x 160 = 1050
x x 100 12 38 12 100 38 316 = = =. x x 1000 37 2 137 2 37 2 1000 137 2 271 = = =.... 36 100 40 100 40 36 111 = = = x x
100m A. B. 100n C. 100n n D. n m m + n m
= 100% ( + ) [ ] 100% 1 / 3
2. 8 100% 14% 20 = 36 100% = 26. 5 136 50 98% x = = 245 20% 1 3=10-6 3=1 H2SO4 20
3 3 500 114 / 20% 3 x = 3 = 632. 184. / 98%
2 SO 4
ph 4 ph 8
100 0.9
NH4+
NH4NO3+NaOH=NaNO3+NH3+H2O zhòng
A
+ 2- A.H SO = H + SO 2 4 2 4-2 2 2 +3-1 3 + 3Cl 3+ 2-2(SO4 3 4 B. Ca (OH) = Ca + (OH) C.AlCl = Al D.Al ) 2Al + 3SO
S c a b c = 100( )