A model showing that gases are made from the matter of particles that are too small to see and are moving freely around in space can explain many observations.
Answer: The net ionic equation for the cobalt-silver voltaic cell is 
Explanation: In cobalt-silver voltaic cell, one half of the cell consists of cobalt electrode immersed in 
solution ( which means that 
are present in the solution) and other half of the cell consists of the Ag electrode immersed in 
solution ( which means that 
is present in the solution)
The two electrodes are joined by the copper wire. The cobalt electrode acts as an anode and the silver electrode acts a cathode.
At anode, oxidation reaction takes place and at cathode, reduction reaction takes place.
At Anode : 
At Cathode: ![[Ag^+(aq.)+e^-\rightarrow Ag(s)]\times 3](https://tex.z-dn.net/?f=%5BAg%5E%2B%28aq.%29%2Be%5E-%5Crightarrow%20Ag%28s%29%5D%5Ctimes%203)
Net ionic equation:
Answer:
I think that's a physical change since nothing is getting it's properties changed.
Explanation:
a chemical change usually changes the properties and cannot be changed back, this is simply washing your hands so I would guess that a physical change. think of like putting water on paper, the properties aren't changed you just have a paper with water on it now and can be easily dried.
Answer:
14. the metal is tin which it density is equal 7.3g/cm^3
Answer is valence electron, they all have total of 2 valence electron.
remember group number = valence electron
