During a chemica change the composition of reactants is modified, new products appear.
The mass of the reactants equals the mass of the products. The number and kind of each element in the reactants are the same in the products, they are just rearranged.
Not true, they are not similar; a chemical change is a change in the molecule, the physical change is not.
The statement is false: A chemical change of a substance is defined as a change in which the substance is not the same substance after the change as it was before.
Yes
There are signs that you can see when a chemical change takes place. It is true that fizzing or foaming is evidence that a chemical change may have occurred.
The answer is true
Not true, they are not similar; a chemical change is a change in the molecule, the physical change is not.
It is true that a chemical reaction causes a chemical change. An example of this can be seen by adding baking soda to vinegar.
chemical change
A change in color
The statement is false: A chemical change of a substance is defined as a change in which the substance is not the same substance after the change as it was before.
true
True. A physical change is a change from one state to another without a change in chemical chemistry.
A change in color
Yes
no its not true
A chemical has changed appearance in both a physical and chemical change. It cannot stay the same or it wouldn't have changed.
There are signs that you can see when a chemical change takes place. It is true that fizzing or foaming is evidence that a chemical change may have occurred.