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Firlakuza [10]
3 years ago
9

__________ is considered to be the greatest solvent in the world because it can dissolve so many substances.

Chemistry
1 answer:
allochka39001 [22]3 years ago
6 0
The correct answer is c. water. 
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Read excerpt and answer 3 questions I’ll mark brainliest. Pls thank you
mario62 [17]

Answer:

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Explanation:

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6 0
3 years ago
Calculate the ΔG for the following system. Then state if the system is spontaneous or not spontaneous. ΔH = 147 kJ ΔS = -67.0 J/
lbvjy [14]

Answer:

ΔG for the given system is 28.421 kJ. The system is non spontaneous.

Explanation:

ΔH = 147 kJ =147,000 J= Enthalpy of the system

ΔS = -67.0 J/K = Entropy change

T = 149 °C = 422.15 K = Temperature of the system

((T)°C=273.15 +T K)

ΔG = Gibbs free energy ?

The Gibbs free energy 's expression is given by:

ΔG = ΔH  - T ΔS

  • ΔG > 0 , non spontaneous
  • ΔG < 0, spontaneous

\Delta G^o=147,000 J-422.15 K\times (-67.0)

ΔG = 28,421 J = 28.421 kJ

Since, value of Gibbs free energy is positive this means that reaction is non spontaneous.

5 0
3 years ago
Which of the following is a sign a chemical reaction has occurred? A liquid changes to a solid when cooled. A liquid forms bubbl
3241004551 [841]

The best answer is, “Two clear liquids combine and turn cloudy.”

When water freezes form a liquid to a solid. That’s a physical change.

When water boils, it forms bubbles. That’s a physical change.

When you mix ethanol and water, they form a clear solution. That’s a physical change.

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3 years ago
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Please HELP, the question is attached.
Nezavi [6.7K]

Try this solution, all the details are described in the attached picture.

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3 years ago
A speed time graph shows that a car moves at 20 m/s for 15s. The car's speed steadily decreases until it comes to a stop at 40s.
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0s to 15s: constant speed/zero acceleration
15s to 40s: constant gradient, therefore constant deceleration
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