Printable worksheet · 3 of 4

Count each element on both sides - Paper 3

Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.

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Symbolic equation to balance: CO + O2 -> CO2. Numerals within a formula count atoms; leading coefficients count whole formula units or molecules. Use the smallest positive whole-number coefficients without changing any formula. This is atom accounting only, not permission or instructions to perform a reaction.

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