ChemCalc Dump /sym/93428e
id=1 · host=br.gridbatch.net · 2026-10-19 01:02Z
\binom{n}{k} = \frac{n!}{k!(n-k)!}
∇²ω = 0
\frac{4}{6} \sum_{i=1}^{n} i^{2}
91K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
Fe₂O₃ + 3CO → 2Fe + 3CO₂
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
264K
2H₂ + O₂ → 2H₂O
10r² + 7r + 5 = 0
\frac{11}{6} \sum_{i=1}^{n} i^{2}
6K
AgNO₃ + NaCl → AgCl↓ + NaNO₃