Seven-round challenge
Randomly draw 7 distinct puzzles from 11 examples. Enter whole-number coefficients from 1 to 12. The number 1 may be omitted when writing an equation. You earn one point only for a balanced answer with the smallest whole-number coefficients. An equation can be atom-balanced yet still have coefficients that should be simplified.
Safety: Symbolic equations are not instructions to run chemical reactions. Do not make these chemicals or reactions at home.
Entirely local; practice scores are not official examination results.
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Use the inputs to balance both sides.
Reactants
Products
| Element | Reactant atoms | Product atoms | Match? |
|---|
Learning record
0 of 7 solved
Best: —
Explain one error you fixed in your science journal. Public answer checking is for learning, not a supervised exam.