putang ina
Okay now here goes in a physical change no chemical reaction takes place. in chemical change chemical reactions take place. A physical change is reversible but a chemical change is not.In a physical change no new substance is formed(A+B=B) in a chemical change new substances are formed(A+B=C)
You can show what happens in a chemical reaction by writing a balanced chemical equation that represents the reactants turning into products. Alternatively, you can use diagrams or drawings to illustrate the rearrangement of atoms and bonds during the reaction. Physical changes such as color changes, gas production, or temperature changes can also indicate a chemical reaction is occurring.
penis
They write a chemical equation.
Writing out a chemical equation for a specific chemical reaction.
A PHYSICAL CHANGE MEANS CHANGE IN EXTERNAL APPEARANCE .A CHEMICAL CHANGE MEANS THE CHANGE IN THE PARTICLES BY WHICH IT IS MADE up OF.Physical Changes are d changes which are reversible .In this change we can get the products back. eg-Mixing of water and salt ,we can get salt back .Chemical changes are d changes which are irreversible . In this change we cannot get the products back . eg- Burning of candle , we cannot get the matchstick back after burning .
We have chemical symbols so that we can quickly write about an element or compound with out having to write out the name every time you want to refer to it.
To write a sentence using the term "chemical formula," you can say: "H2O is the chemical formula for water." This simple example showcases a chemical formula and relates it to a common substance.
Pb
The chemical formula of methane is CH4.
The chemical formula for barium fluoride is BaF2.
by writting what you did at schoo1 today and what activities did you do.