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Which of the following noble gases has the highest positive electron gain enthalpy value?
(a) Helium
(b) Krypton
(c) Argon
(d) Neon
Updated Mon, 20 Aug 2018 04:52 pm


Some older emergency oxygen masks containing potassium superoxide,$KO_2$ which reacts with $CO_2$ and water in exhaled air to produce oxygen according to the given equation. If a person exhales $0.667g$ of $CO_2$ per minute, how many grams of $KO_2$ are consumed in 5 minutes? $4KO_2 + 2H_2O + 4CO_2 = 4KHCO_3 + 3O_2$
Updated Mon, 20 Aug 2018 12:43 pm