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Alexus [3.1K]
3 years ago
10

Which one of these statements is/are true: I. All redox reactions with positive emfs are spontaneous. II. If a redox reaction is

spontaneous, it must be fast. III. A spontaneous redox reaction will have a cathode reaction that has a more negative reduction potential than the anode. III only. I and III are true. I only. II only. All of I, II, and III are true.
Chemistry
1 answer:
AleksAgata [21]3 years ago
5 0

Answer:

yea all the answers are true

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What conditions make G always positive?
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(30 pts) Winds blow across the Earth from high-pressure systems to low-pressure systems. But winds don’t travel in a straight li
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In the laboratory a student determines the specific heat of a metal. He heats 19.5 grams of copper to 98.27 °C and then drops it
siniylev [52]

Answer:

The specific heat of copper is 0.37 J/g°C

Explanation:

<u>Step 1: </u>Data given

Mass of copper = 19.5 grams

Initial temperature of copper = 98.27 °C

Mass of water = 76.3 grams

Initial temperature of water = 24.05 °C

Final temperature of water and copper = 25.69 °C

<u>Step 2:</u> Calculate specific heat of copper

Qgained = -Qlost

Q = m*c*ΔT

Qwater = -Qcopper

m(water) * c(water) * ΔT(water) = - m(copper) * c(copper) *ΔT(copper)

⇒ with m(water) = 76.3 grams

⇒ with c(water) = 4.184 J/g°C

⇒ with ΔT(water) = T2-T1 = 25.69 - 24.05 = 1.64

⇒ with m(copper) = 19.5 grams

⇒ with c(copper) = TO BE DETERMINED

⇒ with ΔT(copper) = T2-T1 = 25.69 - 98.27 = -72.58

76.3 * 4.184 * 1.64 = - 19.5 * c(copper) * -72.58

523.552 = 1415.31 * c(copper)

c(copper) = 0.37 J/g°C

The specific heat of copper is 0.37 J/g°C

3 0
4 years ago
In fission, a ________ _________ is one where a neutron imbeds itself in the nucleus of a U-235 atom causing it to break apart.
SVEN [57.7K]

a. chain reaction

Explanation:

In a fission, a chain reaction is one where a neutron embeds itself in the nucleus of an U-235 atom and causes it to break apart. After this, more neutrons are created. The neutrons carry on the cycle by starting the fission process over and over again.

Chain reactions typifies most nuclear reactions taking place in the nucleus of an atom.

They are repeated loops that takes place until an atom reaches it state of stability.

  • They are not exclusive to fission reactions alone.
  • Chain reactions also takes place during nuclear fusion
  • In fusion two atoms combines to produce a single nuclide.
  • The steps goes on and on
  • This why the sun keeps burning and bursting with energy

learn more:

Nuclear transmutation brainly.com/question/3433940

#learnwithBrainly

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