Question

i need a working model in chemistry....im in 9th grade....please help!!

Answer 1

try experiments of electrochemical cells

Answer 2

U cud make a working model of a volcano with the aid of some simple materials and a little imagination........

Answer 3

i advice u to make kelvin water drop.... its a nice phenomenon... which combine ahemistry with physics....

Answer 4

I will tell you an easy one.Look up Boyle`s law.The theory states that the volume of a sample of gas is inversely proportional to its pressure, if temperature remains constant.

The formula is easy.
\[P _{1}V _{1}=P _{2}V _{2}\]
Where P stands for pressure and V stands for Volume.
You can just design an expremint where the only thing you need is a syringe and pressure gauge reader and a plastic tube.Hook up the plastic tube to the mouth of the syringe.when you press down you will notice the change in the pressure and the reading of the meter reading will go up.
This experiment is quite easy and you can be done in few minutes.Just look it up.