Modelová Otázka ID 2761 - 
Jaká je hmotnost plynného kyslíku, který má za standardních podmínek objem 2,4 m3?
Správná odpověď je: A
Princip je stejný jako u předchozí úlohy, je však třeba převést objem na dm3 a dosadit molární hmotnost molekul kyslíku O2 (32 g/mol). Výpočet provedeme následovně:
m = n · M = (V/Vid) · M = (2 400/22,414) · 32 = 3 426 g = 3,43 kg.
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