Question

balance Zn(No3)2 gives zno + No2 +O2
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Answer 1

2 Zn(NO3)2 → 2 ZnO + 4 NO2 + O2

This is an oxidation-reduction (redox) reaction:

4 NV + 4 e- → 4 NIV

(reduction)

2 O-II - 4 e- → 2 O0

(oxidation)

Zn(NO3)2 is an oxidizing agent, Zn(NO3)2 is a reducing agent.

Reactants:

Zn(NO3)2 – Zinc nitrate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04

Other names: Zinc dinitrate source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Zinc(II) nitrate source: wikidata, accessed: 2019-09-02, Nitric acid, zinc salt source: ICSC, accessed: 2019-09-04

Appearance: Colorless, deliquescent crystals source: wikipedia, accessed: 2019-09-27; Colourless crystals or powder source: ICSC, accessed: 2019-09-04

Products:

ZnO

Names: Zinc oxide source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Zinc white source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Calamine source: wikipedia, accessed: 2019-09-28

Appearance: White solid source: wikipedia, accessed: 2019-09-28; White powder source: ICSC, accessed: 2019-09-04; White, odorless solid. source: NIOSH NPG, accessed: 2019-09-02

NO2 – Nitrogen dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02

Other names: Nitrogen(IV) oxide source: wikipedia, accessed: 2019-09-27, Deutoxide of nitrogen source: wikipedia, accessed: 2019-09-27, Nitrogen peroxide source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02

Appearance: Brown gas source: wikipedia, accessed: 2019-09-27; Reddish-brown gas or brown or yellow liquid with pungent odour source: ICSC, accessed: 2019-09-04; Yellowish-brown liquid or reddish-brown gas (above 70°F) with a pungent, acrid odor. [Note: In solid form (below 15°F) it is found structurally as N2O4.] source: NIOSH NPG, accessed: 2019-09-02

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 source: ICSC, accessed: 2019-09-04

Answer 2

2Zn(NO3) 2 gives 2ZnO + 2NO2 + 2O2