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What is the term for a substance that speeds up chemical reactions but is not used up or permanently changed?
A catalyst speeds up reactions by lowering the activation energy required for the reaction to occur. The concentration of the catalyst does not change and it is neither part of the reactants nor products; it is an intermediate.
The heat exchange in chemical reactions is due to a change in?
The chemical composition of reactants is changed.
Is it true that catalyst speed chemical reactions but are not changed by them?
Yes, it's true.
What is the substance that alters the rate of a chemical reaction without being permanently changed in the reaction?
These are called catalysts.
Is seeds to pumpkin physical or chemical change?
This process involve chemical reactions but also physical changes.
Are enzymes permanently changed in the chemical reactions they are involved in?
No. Enzymes are not permanently changed in the chemical reactions in which they are involved. After the reaction, they regain their original shape and are free to catalyze another of the same reaction.
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.
Substances that are changed when they become involved in chemical reactions are called what?
Reactants
Substances that are changed when they become involved in chemical reactions are?
The substances that are changed in a chemical reaction are known as reactants. These reactants undergo a chemical change or transformation to form new substances called products through the rearrangement of their atoms.
Is it true that Enzymes are permanently changed by the reactions they catalyze?
true
What kind of neutrons are changed into protons?
Only those involved in nuclear reactions. Ordinary chemical reaction can not effect this change.
What is the term for a substance that speeds up chemical reactions but is not used up or permanently changed?
A catalyst speeds up reactions by lowering the activation energy required for the reaction to occur. The concentration of the catalyst does not change and it is neither part of the reactants nor products; it is an intermediate.
Can gasses be changed?
Through chemical reactions, yes.
The heat exchange in chemical reactions is due to a change in?
The chemical composition of reactants is changed.
What is chemical and physical reactions?
A physical reaction is were the current substance can be changed in state and then changed back easily to it's previous state, a chemical reaction is the opposite, it is difficult to change it back to its previous state.
How can elements be changed into compounds?
Elements become compounds after chemical reactions.
What is the process in which substances are changed into different substances?
The processes are called chemical reactions.
