When choline chloride and urea--both solids--are mixed together in a molar ratio of 1:2, a liquid mixture is formed that freezes at 12 C. As pure compounds, choline chloride ([HOCH 2 CH 2 N(CH 3) 3] + ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

For more than a century, schoolbook physics has divided matter into neat categories like solid, liquid, gas, and plasma. A ...