Maybe to see if the gas was safe to mammals and if not, what the effects were.
As materials move from higher to lower concentration diffusion is occurring.
The potential energy in food is what we call a Calorie, which (note the capitalization) is actually a kiloCalorie (1000 calories). Just pick any food high in calories; fats and oils are very calorie dense.
The attached image contains a graph which is showing the levels of nitrous oxide. According to the data in the graph, The levels of nitrous oxide in the following years should be;
- 1600 :- 265
- 1700 :- 275
- 1800 :- 280
- 1900 :- 300
- 2000 :- 310
<em>Thus</em><em>,</em><em> </em><em>Table</em><em> </em><em>in</em><em> </em><em>option</em><em> </em><em>C</em><em> </em><em>is</em><em> </em><em>correct</em><em>!</em>