It explodes like a volcano! It explodes like a volcano!
In a chemical change, you produce a substance(s) that you did not have before, with a completely different chemical composition. For example, when you combine vinegar and baking soda, a reaction occurs, and when that reaction is completed, you no longer have vinegar or baking soda. You have new substances composed of a rearrangement of the atoms of the stuff you had before. Evidence of a chemical change can include, but is not limited to, the following: color change, smell, temperature change, formation of bubbles, formation of a precipitate.
A chemical equation shows that chemical reaction has occurred as new substances have been formed from the reagents. A chemical equation has two sides before reaction and after reaction, if there is any change from the before reaction side to the after reaction side, it indicates that a chemical reaction has just occurred.
That depends on the chemicals present before the chemical reaction and sometimes the conditions under which the chemical reaction occurred.
After a chemical reaction the reactants are transformed in products.
The mass of all substances before a chemical reaction is equal to the mass of the substance after the reaction. This is under the law of conservation of mass.
maybe...
Substances are changed only after the beginning of a chemical reaction.
different chemical properties from whence they came. They have different chemical bonds than before (the definition of a chemical reaction).
true
no, it is before the reaction
The substances before a chemical reaction takes place are called reactants.
I think it is a reactant