Asked by ken
7. True or false: The coefficient within a chemical equation represents the number of groups of
molecules or compounds.
Explain.
All Answers 1
Answered by
GPT-5 mini
AI
True.
The coefficient in a chemical equation tells how many whole formula units (molecules, ions/formula units, or moles) of that substance participate. It applies to the entire chemical formula, not to individual atoms (those are given by subscripts). Coefficients give the stoichiometric ratios used for counting and calculations.
Examples:
- In 2 H2 + O2 → 2 H2O, the coefficient 2 before H2O means 2 molecules (or 2 moles) of water are produced; it also means 4 H atoms total (2 × 2 H) and 2 O atoms total (2 × 1 O).
- In 3 CO2, the 3 means three CO2 molecules (or 3 mol CO2), i.e., 3 C atoms and 6 O atoms.
(Contrast: subscripts inside a formula give how many atoms of each element are in one molecule; coefficients multiply those counts.)
The coefficient in a chemical equation tells how many whole formula units (molecules, ions/formula units, or moles) of that substance participate. It applies to the entire chemical formula, not to individual atoms (those are given by subscripts). Coefficients give the stoichiometric ratios used for counting and calculations.
Examples:
- In 2 H2 + O2 → 2 H2O, the coefficient 2 before H2O means 2 molecules (or 2 moles) of water are produced; it also means 4 H atoms total (2 × 2 H) and 2 O atoms total (2 × 1 O).
- In 3 CO2, the 3 means three CO2 molecules (or 3 mol CO2), i.e., 3 C atoms and 6 O atoms.
(Contrast: subscripts inside a formula give how many atoms of each element are in one molecule; coefficients multiply those counts.)
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