Symbolic Index /sym/ea4bfa
id=1 · host=au.commstar.world · 2026-10-20 14:55Z
∑_{k=1}^{n} k = n(n+1)/2
Fe₂O₃ + 3CO → 2Fe + 3CO₂
52K
det| 12 5 ; 4 13 | = 136
∑_{k=1}^{n} k = n(n+1)/2
90K
det| 9 4 ; 1 10 | = 86
91K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
det| 8 5 ; 3 9 | = 57
50K
∑_{k=1}^{n} k = n(n+1)/2
137K
det| 11 9 ; 5 12 | = 87
197K