Answer:

Explanation:
We have two pressures, two temperatures, and one volume.
This looks like a question in which we can use the Combined Gas Law to calculate the volume.

Data:

Calculation:

Answer:
C2H6 OR C6H12O6 THE ANSWER
2nd
Explanation:
because i guesses i guess so yeah trust your gut buddy
Answer:A property that changes if the amount of substance changes
Explanation:
This is the answer