CHEMISTRY HIGH SCHOOL

A catalyst works by(1) increasing the potential energy of the reactants(2) increasing the energy released during a reaction(3) decreasing the potential energy of the products(4) decreasing the activation energy required for a reaction

Answers

Answer 1
Answer:

Answer: Option (4) is the correct answer.

Explanation:

Activation energy is the minimum amount of energy required by reactant molecules to undergo a chemical reaction.

Whereas a catalyst is defined as the substance that helps in increasing the rate of reaction by decreasing the activation energy without itself getting consumed in the reaction.

When a catalyst decreases the activation energy then molecules with lesser energy become able to participate in the reaction and thus, products are obtained at a faster rate. Hence, a catalyst increases the rate of a reaction.

Thus, we can conclude that a catalyst works by decreasing the activation energy required for a reaction.
Answer 2
Answer: The catalyst (4) decreases the activation energy required for a reaction, by holding reactants in place

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If enough heat was REMOVED from B, it would change into ____________.

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If enough heat was REMOVED from B, it would change into A.

An exothermic reaction is a reaction that releases energy, this energy is usually in the form of heat. An endothermic reaction is a reaction that absorbs energy to take place.

To bring molecules together requires the release of energy, that is, an exothermic reaction.

Thus, if heat were removed from B, it would turn into A, with molecules closer together, in the solid state.

Learn more about exothermic reaction in: brainly.com/question/14969584
If enough heat was removed from B(liquid) it would become a solid i think.

True or False: Wind can cause ocean currents

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Answer:

true

Explanation:

Answer:

True the wind causes waves in the ocean

Explanation:

if a jar of honey sits for a long time, sugar may crystallize in the jar.describe two possible cause for this crystallization?

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Answer:

Temperature and humidity

Explanation:

Crystallization occurs in super saturated solution. These are the solutions that have solute to solvent ratio of 2:1 or more. Typical honey is 70% sugar and 20% water (the solute concentration is too high).  

Two things cause honey to crystallize.

  1. Temperature
  2. Humidity level

If temperature is lowered the rate of crystallization increases. This is because at low temperature the molecules of solvent come closer and the space between them reduces. This causes the additional solute molecules to be pushed up to form crystals.  

Secondly, humidity also plays a key role. If the humidity reduces, the water molecules evaporates from honey into air. This increases the relative concentration of the solute inside the honey, which causes the honey to crystallize.  
The two possible causes for crystallization in honey is 1. The condition of the room. (if the temperature keeps rising and dropping rapidly) 2. Crystallization rate also depends on the type of honey you keep in your cabinet. There are 300 different kinds of honey and each type crystalizes differently

What is a crystal?a. a type of rock
b. the smallest unit of an element
c. an artificial, decorative substance
d. a solid made of atoms arranged in an orderly fashion

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A crystal is a solid made of atoms arranged in an orderly fashion .

answer: d. a solid made of atoms arranged in an orderly fashion.
D solid made of atoms arranged in an orderly configuration.

Which type of reaction produces the most dangerous radioactive waste?

Answers

The correct answer to the question above is fussion of uranium. The fussion of uranium is the only type of reaction in which produces the most dangerous radioactive waste. The fusion of uranium means the binding of their atoms and produce a radioactive waste.
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