Answer:

Explanation:
Hello,
In this case, we use the Boyle's law which allows us to understand the volume-pressure behavior as an inversely proportional relationship:

Thus, solving for the final volume, once the pressure changes, we obtain:

Best regards.
The percent composition of what? It should ask to find the percent composition of one of the parts like copper, sulfer, or water.
Acid, however it is quite weak. Water's pH is somewhere between 5.4 and 7
Answer:
NH3
Explanation:
The "tri" attached to the trihydride means 3. So your hydrogen is going to have 3 atoms.
They are always in motion<span />