When air is hot, the the particles move much faster and when the air is cold the particles slow down as they are condensing
Answer:
A. maintain electrical neutrality in the half-cells via migration of ions
Explanation:
Salt bridge -
For an electrochemical reaction , involving an anode and a cathode , both the electrodes are connect via a salt bridge to complete the circuit for the reaction .
One of the very important use of a salt bridge is to maintain the electrical neutrality of the respective half cells , which is achieved by the movement of ions .
Hence , from the given options , the correct option is ( a ) .
No water no life
That's why
<h2>Al (s) + O₂ (g)----> Al₂O₃(s)</h2>
Explanation:
Chemical reaction
When two or more substances react and form some new substance it is called as chemical reaction .
For example :
Al (s) + O₂ (g)----> Al₂O₃(s)
Chemical equation
It is the representation of chemical reaction in terms of symbols ,molecular formulas ,moles , states etc .
As we know all chemical reaction obeys law of chemical combination therefore chemical reaction need to be balanced .
Law of conservation of mass
Mass can neither be created nor be destroyed in a chemical reaction , it is always conserved .That is why reactions need to be balanced .
Let us balance
Al (s) + O₂ (g)----> Al₂O₃(s)
After balancing , it becomes :
2Al (s) + 3/2O₂ (g)----> Al₂O₃(s)
Actually, to examine it physically, then you could use a physical property that shows it's appearance. To examine its bonds etc, you'd need a chemical property. So, False.
