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(NH4)2Cr2O7(s) ⇒ Cr2O3(s) + N2(g) + 4H2O(l) |
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(NH4)2Cr2O7 = 252 Number of moles of (NH4)2Cr2O7 = 5/252 = 0.0198 (NH4)2Cr2O7 º N2 \ number of moles of N2 = 0.0198 \ volume of N2 = 0.0198 × 24 = 0.476 dm3 = 476 cm3 |
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