Question

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Write balanced chemical equation for the reactions taking place when:
a) Zinc carbonated is calcinated.
b) Zinc sulphide is roasted.
c) Zinc oxide is reducedto zinc.
d) Cinnabar is heated in the air.
e) Manganese dioxide is heated with aluminium powder.​

Answer 1

Hi mate

1) zinc carbonate is heated at 400 degree Celsius and it gives zinc oxide and carbon dioxide as result.

ZnCO3=ZnO+CO2

2) 2 molecules of Mercury sulphide are heated in the presence of air and it gives it two molecules of mercuric oxide and two molecules of Sulphur dioxide.

2HgS+3O2=2HgO+3O2

3)The aluminum takes the oxygen from the manganese dioxide and reduces the manganese dioxide to metallic manganese and creates aluminum oxide plus a LOT of heat.

3MnO +2Al=3Mn+Al2O3

I hope it will help you

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Answer 2

Explanation:

1)ZnCo3=Zno+Co2

2)2HgS+3O2=2HgO+3O2

3)3Mno+2Al=3Mn+Al2O3