Answer:
Cedar, mahogany, red wood or something else is fine, but the only downside is that it will cost you more. However, a project that is partially or fully exposed to the elements, something more than normal lumber is a must. The most cost effective method is to use pressure treated lumber.
Explanation:
0.014 mol of gas undergoes the process shown in the figure (Figure 1) .
The answer is D.
The air inside the bubbles is gas and the solid forms the bubble.