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Roman55 [17]
3 years ago
13

6th grade science i mark as brainliest​

Chemistry
1 answer:
Blababa [14]3 years ago
8 0

Answer:

It's the 4th one. The car is accelerating gradually.

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What will you expect from an endothermic reaction
Lera25 [3.4K]
An endothermic reaction is when the energy is absorbed, while an exothermic reaction releases energy.
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3 years ago
A mixture of helium, nitrogen and oxygen has a total pressure of 756 mmHg. The partial
Karolina [17]

Answer:

The  partial pressure of oxygen in the mixture is 296 mmHg.

Explanation:

The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone.

This relationship is due to the assumption that there are no attractive forces between the gases.

So, in this case, the total pressure is:

PT=Phelium + Pnitrogen + Poxygen

You know:

  • PT= 756 mmHg
  • Phelium= 122 mmHg
  • Pnitrogen= 338 mmHg
  • Poxygen= ?

Replacing:

756 mmHg= 122 mmHg + 338 mmHg + Poxygen

Solving:

756 mmHg - 122 mmHg - 338 mmHg = Poxygen

Poxygen= 296 mmHg

<u><em>The  partial pressure of oxygen in the mixture is 296 mmHg.</em></u>

6 0
3 years ago
Write some example of misicible and immisicible liquid​
Eduardwww [97]

Explanation:

miscible liquids: water and alcohol

immiscible liquids: water and oil

4 0
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What ion is formed when an atom of mercury loses two electrons
andrezito [222]

Answer:

magnesium ion  Hg2+ cation is formed

6 0
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Clay and organic matter generally have higher capacity for retaining nutrients than silt and sand.
Svetlanka [38]
The answer is false  because clay have more silt and sand
 
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