Question

A balanced chemical equation among
the following is:
1) HgO2
→ Hg + O2
↑
2) 2HgO → 2Hg + O2
↑
3) 2HgO2
→ Hg2
+ O2
↑
4) 2HgO → 2Hg + O ↑

Answer 1

Answer:

2 HgO (s) → 2 Hg (l) + O2 (g)

This is an oxidation-reduction (redox) reaction:

2 HgII + 4 e- → 2 Hg0

(reduction)

2 O-II - 4 e- → 2 O0

(oxidation)

HgO is an oxidizing agent, HgO is a reducing agent.

Reactants:

HgO – Mercury(II) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02

Other names: Mercuric oxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Montroydite source: wikipedia, accessed: 2019-09-27, Red mercury source: wikipedia, accessed: 2019-09-27, Mercury (II) oxide source: ICSC, accessed: 2019-09-04

Appearance: Yellow or red solid source: wikipedia, accessed: 2019-09-27; Yellow, orange-yellow or red heavy crystalline powder source: ICSC, accessed: 2019-09-04

Products:

Hg

Names: Mercury source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04, Hg source: wikidata, accessed: 2019-09-07, Quicksilver source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04

Appearance: Odourless heavy mobile silvery liquid metal source: ICSC, accessed: 2019-09-04

O2

Names: Dioxygen source: wikidata, accessed: 2019-09-07, Oxygen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, Oxygen (liquefied) source: ICSC, accessed: 2019-09-04

Appearance: Odourless compressed gas source: ICSC, accessed: 2019-09-04; Liquefied gas. colourless-to-blue extremely cold liquid

Answer 2

Answer:

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