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I think what you are looking for is a catalyst. A catalyst lowers the energy or activation for a reaction, allowing it to happen faster. During the reaction nothing actually happens to or changes the catalyst.

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Q: What substances influence other molecules without being changed themselves?
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Related questions

What are substances that change the rate of a chemical reaction without themselves being changed?

Those substances are called, "Catalysts".


How do enzymes act as catalysts in cellular respiration?

Enzymes are catalysts, substances which help to change other substances without being permanetley changed themselves.


The definition of enzyme?

an enzyme is a complex protein that cause a specific chemical change in other substances, without being changed themselves.


Substances that are changed when they become involved in chemical reactions are?

Reactants are substances that are changed when they become involved in chemical reactions. Products are the new substances that are formed.


Substances that are changed when they become involved in chemical reactions are called?

Substances that are changed when they become involved in chemical reactions are called reactants. These reactants are changed into new substances that are called products.


How does biological evolution differ from chemical evolution?

Biological evolution is the process of changes that occur in living beings that can be passed on to their offspring. Chemical evolution is the process of changes that occur in substances. However, scientists have found that these substances have changed to form organic molecules, meaning that they have created life from nonliving substances.


What is the process in which substances are changed into different substances?

The processes are called chemical reactions.


Is enzymes protiene?

Enzymatic proteins are proteins, or enzymes, that speed up chemical reactions in the body. These reactions break apart biological molecules without being changed themselves.


Substance that cannot be changed into simpler substances by chemical means?

Elements cannot be changed into simpler substances by chemical means. To change them into simpler particles, you need nuclear means.


Can all mixtures be changed back into the substances from which they are created?

Yes, because the substances can be separated apart physically.


Can transparent material can be changed into translucent and opaque and why?

yes, they can be changed by increasing the density of their molecules


Which influence on health cannot be changed?

Heredity