The solution of Problem 283 of the collection on genera
If the total amount of your purchases from the seller Михаил_Перович more than:
- 17914 ₽ the discount is 15%
- 8957 ₽ the discount is 10%
- 4479 ₽ the discount is 7%
- 1791 ₽ the discount is 5%
- 896 ₽ the discount is 3%
- 448 ₽ the discount is 2%
- 90 ₽ the discount is 1%
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283. When 2,1 g of iron and sulfur were combined with sulfur, 3.77 kJ were released. Calculate the heat of formation of iron sulphide.