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Troyanec [42]
3 years ago
12

Edge2020 Need Help

Chemistry
2 answers:
Sophie [7]3 years ago
5 0

Answer: B) The fireworks give off heat

pantera1 [17]3 years ago
4 0
The answer is, the fireworks give off heat. which is exothermic
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4 years ago
You are provided with a compound fertilizer, 40-15-10.Calculate the quantity of fertilizer to add to a one hectare field supply
Verdich [7]

Answer:

a. 300 Kg of fertilizer

b. 225 Kg of fertilizer

c. 400 Kg of fertilizer

d. 600 Kg of fertilizer

Explanation:

The percentage composition ratio of Nitrogen, Phosphorus and Potassium in a 1 Kg bag of the given fertilizer is 40:15:10.

Therefore a  1 Kg bag contains;

40/100 * 1 Kg = 0.4 Kg of Nitrogen;

15/100 * 1 Kg = 0.15 Kg of phosphorus;

10/100 * 1 Kg = 0.1 Kg of potassium

Quantity of fertilizer required to add to a hectare to supply;

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c. Phosphorus at a rate of 60 kg/ha = 60/0.15 = 400 Kg of fertilizer

d. Potassium at a rate of 60 kg/ha = 60/0.1 = 600 Kg of fertilizer

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