Answer : The new absolute pressure is, 
Explanation :
Gay-Lussac's Law : It is defined as the pressure of the gas is directly proportional to the temperature of the gas at constant volume and number of moles.
or,
where,
= initial pressure of gas
= final pressure of gas
= initial temperature of gas = 
= final temperature of gas = 
Now put all the given values in the above equation, we get:
Therefore, the new absolute pressure is,
The wave will have a frequency that is larger
I am pretty sure it is d if i am wrong please tell me
Answer:
They are found the same way but use different symbols when found.
Explanation:
Talking about ions, a cation has a positive charge. That means a positive charge is gained by an atom that gives out electrons.
