Chemistry / Chem 1283 · Atom · ~20 seconds
Gas Volumes in Stoichiometric Ratios
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At the same temperature and pressure, reacting gases' volumes follow the same whole-number ratio as their equation coefficients.
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One volume of nitrogen reacts with three volumes of hydrogen to form two volumes of ammonia, matching the equation's 1:3:2 coefficients.
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This volume-ratio shortcut holds only at identical temperature and pressure for every gas — mixed conditions require converting to moles first.