Question

A mercury mirror forms inside a test tube by the thermal decomposition of mercury(II) oxide.



2 HgO(s) 2 Hg(l) + O2(g)

Hrxn = 181.6 kJ
(a) How much heat is needed to decompose 556 g of the oxide?
(b) If 288 kJ of heat is absorbed, how many grams of mercury form?
bofa

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