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Tom [10]
3 years ago
11

Which one of these are correct?

Chemistry
1 answer:
Sergio [31]3 years ago
3 0

The correct answer is the one in the middle. Mixing food coloring and water

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10. If 3.5 kJ of energy are added to a 28.2 g sample of iron at 20°C, what
igor_vitrenko [27]

Answer:

569K

Explanation:

Q = 3.5kJ = 3500J

mass = 28.2g

∅1 = 20°C = 20 + 273 = 293K

∅2 = x

c = 0.449

Q = mc∆∅

3500 = 28.2×0.449×∆∅

3500 = 12.6618×∆∅

∆∅ = 3500/12.6618

∆∅ = 276.4220

∅2 - ∅1 = 276.4220

∅2 = 276.4220 + ∅1

∅2 = 276.4220 + 293

∅2 = 569.4220K

∅2 = 569K

3 0
2 years ago
In a redox reaction, what role does the reducing agent play?
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<span>So the oxidizing agent will receive electrons from the reducing agent and the oxidation agent will take electrons from the reducing agent.</span>
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3 years ago
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Nitroglycerine decomposes violently according to the chemical equation below. What mass of carbon dioxide gas is produced from t
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Explanation:

Below is an attachment containing the solution.

5 0
3 years ago
Diego is trying to lift a piano to the second floor of his house. Diego uses a pulley system and gives a big lift to the piano.T
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positive force → balanced force → negative force

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np

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