It will stay the same.
The mass isn't <em>going anywhere</em> (You did mention the jar was hypothetically and therefore hermetically sealed)
The only thing changing here is the density of the water in the jar (whether it be vapor, liquid or otherwise)
as the temperature drops and the vapour becomes liquid, the water will be more dense.
that's not saying that the weight won't increase as that is controlled by the force gravity exerts on the mass. (Hint: water is much more affected by gravity than air is)
ANSWER FOR QUESTION 3: The answer would be B.) because work or energy, is equal to the work done by a force, like the ball.
ANSWER FOR QUESTION 4: The answer would be D.) because when a ball roles down a hill the work to push that ball can transfer energy between the ball or other objects and cause the change in the total amount of energy used.
ANSWER FOR QUESTION 5: The answer is mechanical, because both physical and constant, kenitic and potential.
Caa and cgu is the codons
1. skin tears saliva stomach acid with all produce friendly bacteria. 2. active immunity is when one has a disease or live pathegon and is immune to it afterwards. unlike passive immunity