As per question the initial states of the gases are given as
INITIAL STATE: FINAL STATE:
![v_{2} =3v[say]](https://tex.z-dn.net/?f=v_%7B2%7D%20%3D3v%5Bsay%5D)

AS per combined gas equation obtained from the combination of Boyle's law and Charles law [Basic ideal gas laws]

Hence 
=
=190.3 K [ANS]
The nucleus that completes the equation given above is 218/85 At, which is option D.
<h3>What is a nuclear fission?</h3>
Nuclear fission is a nuclear reaction in which a large nucleus splits into smaller ones with the simultaneous release of energy.
According to this question, the following nuclear fission reaction is given: 222/87Fr = 4/2He+ ?
To find the missing nucleus, we subtract 4 from 222 to get 218, therefore, the nucleus that completes the equation given above is 218/85 At.
Learn more about nuclear fission at: brainly.com/question/913303
#SPJ1
Answer:
69 (Nice)
Explanation:
The increase is three so when you add three to 66, well you get 69 :)
Hope this helps!
All the love, Ya boi Fraser :)