Container 2 is a closed system because the mass did not change even
though the volume changed.
<h3>What is a Closed system?</h3>
A closed system is the type of system which prohibits the transfer of
matter in and out the system.
In a closed system , the mass of the matter present is always the same
regardless of the changes which occurred which is why option D is the
most appropriate option.
Read more about Closed system here brainly.com/question/3690180
Answer:
the atomic radius is larger as you go down the noble gas family
The sum of the mass numbers and the sum of the atomic numbers balance on either side of an equation
Answer: 1) 
2) 
3) 
4) 
Explanation:
According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.
1) 
Here, 
is loosing a proton, thus it is considered as an acid and after losing a proton, it forms which is a conjugate base.
2) 
Here, 
is loosing a proton, thus it is considered as an acid and after losing a proton, it forms which is a conjugate base.
3) 
Here, 
is loosing a proton, thus it is considered as an acid and after losing a proton, it forms which is a conjugate base.
4) 
Here, 
is loosing a proton, thus it is considered as an acid and after losing a proton, it forms which is a conjugate base.
Condensation is the opposite of boiling
