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What are the substances that are present before a chemical reaction starts?
The reactants exist before a reaction begins, and also the products are the result of the reaction of the reactants.
Is Reactants are substances that exist after the reaction has taken place?
see i dont know
Two substance were made to react in a closed vesselwhich will remain the same before and after the reaction?
If the reactants and products in a chemical reaction exist in the same physical state (solid, liquid, gas) and the total number of atoms of each element remains constant before and after the reaction, the mass of the substances in a closed vessel will be the same. This is known as the law of conservation of mass, which states that mass is neither created nor destroyed in a chemical reaction.
What is created and what is destroyed during a chemical reaction?
During a chemical reaction, new substances are created through the rearrangement of atoms and molecules. At the same time, the original substances are destroyed as they no longer exist in their original form. This process involves the breaking of chemical bonds in the reactants and the formation of new bonds in the products.
When two or more substances are combined the temperature of the reaction will?
When two or more substances are combined, the temperature of the reaction may increase or decrease depending on the specific reaction. This change in temperature is due to the release or absorption of energy during the chemical reaction.
When after a chemical reaction do the reactants still exist?
There can be many cases. One of them being that you take the reactants in excess then a little portion of the reactants remain. Another is the reaction cannot take place. In reversible reactions. But you should note that the exact proportion of reaction cannot remain in a reaction cause you are trying to form new comounds during this reaction.
How long did man made elements exist for before turning into other substances?
Look up the 'chart of the nuclides'.
The only sure evidence for a chemical reaction is?
A kind of chemical bond in the possible reaction products that did not exist in the reactants, or a kind of chemical bond in the reactants that does not exist in the possible reaction products.
What do you know about types of atoms before and after a reaction?
Assuming that you are referring to chemical reactions, we know that atoms are not changed by chemical reactions (except for their oxidation states). That means that all the same types of atoms are present after the reactions as were there before the reactions. The type of an atom is determined by the number of protons in its nucleus.
What do they call all objects that exist?
Objects that exist, scientifically are substances.
What is the same number that existed before the reaction exist after the reaction?
The total number of atoms is conserved in a chemical reaction, meaning the number of atoms of each element before the reaction will be the same as after the reaction. This principle is known as the law of conservation of mass.
What happens if chemical reaction did not exist?
nothing would exist
