trish is making protein shakes for her friends. she mixes a protein powder into milk until the powder disappears. what property of matter is she using

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

d.) circle motion requires a force to give it a centripetal acceleration.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.