Assuming nitrogen is an ideal gas, we use the relation PV=nRT tp predict what will happen to the system. From the equation, nR/P is constant. So, if the sample is cooled to 72K then volume would decrease. This decrease in volume would affect the density of the substance. It would increase its density. Therefore, the answer would be density.
A page in an assignment or paper that cites all the websites and sources ou used is very important, and often is underestimated.
First, and most importantly, you do it to credit the author's original idea. It was their work, and they deserve to be credited for it.
Next, you do it to avoid plagiarism. Most schools give out 0's for plagiarism, and if you're publishing it, you can get sued.
It can also be used to organize source material, and that leads me into my next point, how it directs readers to sources to learn more. If all the sources are organized, it's better for the keen reader who wants more info.
Hope this helped!
1. She could see in the open square before her house the tops of trees that were all aquiver with the new spring life.
2. There were patches of blue sky showing here and there through the clouds that had met and piled one above the other in the west facing her window.
Abraham Lincoln = noun
Best known = adjective
Leading = verb
Civil war= noun
