Solution of problem 627 of the collection on general ch

If the total amount of your purchases from the seller Михаил_Перович more than:
- 20383 ₽ the discount is 15%
- 10191 ₽ the discount is 10%
- 5096 ₽ the discount is 7%
- 2038 ₽ the discount is 5%
- 1019 ₽ the discount is 3%
- 510 ₽ the discount is 2%
- 102 ₽ the discount is 1%

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627. Complete the equations of reactions in which concentrated nitric acid serves as an oxidizing agent:

A) C + HNO3 → CO2 +

B) Sb + HNO3 → HSbO3 +

C) Bi + HNO3 → Bi (NO3) 3+

D) PbS + HNO3 → PbSO4 + NO2 +