-) A sample of oxygen had an initial volume of 25.0L and was at a standard pressure of 30atm, what would the new volume be if the pressure was increased to 55.00 atm?

Explanation:

The new volume can be found by using the formula for Boyle's law which is

From the question we have

From the question we have

We have the final answer as

Hope this helps you

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.