Show by a simple experiment that diffusion becomes faster when temperature is raised
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An example of temperature increasing diffusion rate would be a tea bag in cold water vs a tea bag in hot water.
The tea will diffuse faster in the hot water vs the tea in the cold water.
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What happens to the molecules in a gas when it condenses?
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a ball is rolling across the floor.How could you apply an unbalanced force to change the speed or direction of the ball?
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Which statement describes this reaction?
( I) Bonds are broken, and the reaction is endothermic.
(2) Bonds are broken , and the reaction is exothermic.
(3) Bonds are formed, and the reaction is endothermic.
(4) Bonds are formed, and the reaction is exothermic.
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Answer: Option (1) is the correct answer.
Explanation:
In a molecule, the nitrogen atoms are bonded together by triple bond.
Therefore, in order to break this triple bond high heat or energy has to be provided.
Thus, the reaction shows that N triple bond N is broken down as energy is absorbed by
molecule.
Hence, we can conclude that in the given reaction bonds are broken, and the reaction is endothermic.
(2) Bonds are broken , and the reaction is exothermic.
(3) Bonds are formed, and the reaction is endothermic.
(4) Bonds are formed, and the reaction is exothermic.
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Answer:
Here's what I get.
Explanation:
Consider the molecule shown below.
It has two chiral centres, labelled R and S, and an internal mirror plane that makes the right and left halves of the molecule mirror images of each other.
If we pass a beam of plane-polarized light through the sample, the R portion of the molecule will rotate the light in a certain direction.
However, the S portion will rotate the light by the same amount in the opposite direction.
The two effects cancel each other, so the molecule has no net effect on plane-polarized light.
Even though the molecule has two chiral centres, it is achiral because it has an internal plane of symmetry.
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B) The attractive forces are stronger in a liquid
C) The attractive forces are stronger in a solid
D)The attractive forces of a solid allow the particle to move freely while the liquid molecules vibrate around a fixed point
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Answer:
Option-C (The attractive forces are stronger in a solid)
Explanation:
The substance either exist as a Solid or Liquid depends upon on the following two factors;
ii) Kinetic Energy:
Greater the K.E of particles, greater will be the distance between the particles of a substance. In Liquids the K.E of particles is greater than the K.E of particles in Solid. Hence, the Liquid Particles separated by greater distance as compared to particles of Solids.
ii) Attractive Intermolecular Forces:
Greater the Attractive Intermolecular Forces between the particles of a substance, smaller will be the distance between the particles. As the distance between the particles in Solid state of substance are very small as compared to that of Liquids hence, it can be concluded that the Attractive Intermolecular Forces in Solids are stronger than Liquids.