Answer:
if the pH of a solution is 2.0 that means the solution would be acidic.
Explanation:
The atomic number of cobalt, CO is 27. Since, the cobalt that you asked is in ion. The number of electrons should be 27-3 --> *24* Reasons being that cobalt has donated/given away 3 electrons.
Answer:
The depth of the lake is 67.164 meters.
Explanation:
The combined gas equation is,
where,
= initial pressure of gas in bubble= ?
= final pressure of gas = 0.980 atm
= initial volume of gas = 
= final volume of gas = 8.00 × V
= initial temperature of gas = 
= final temperature of gas = 
Now put all the given values in the above equation, we get:
pressure of the gas in bubble initially is equal to the sum of final pressure and pressure exerted by water at depth h.
Where :
density of water = 
g = acceleration due gravity = 
h = 67.164 m
The depth of the lake is 67.164 meters.
D.
Energy cannot be created nor destroyed. It is just transferred through sound, heat and light.
