Astudent places a 12-gram cube of ice inside a container. after six hours, the student returns to observe the contents of the container. which
sentence suggests that the container is an open system?
oa.
the container contains 12 grams of liquid water and no ice.
ob. the container contains 12 grams of ice and no liquid water.
oc. the container contains 8 grams of liquid water and no ice.
od. the container contains 8 grams of ice and 4 grams of liquid water.
o e. the container contains 8 grams of liquid water and 4 grams of water vapor.

Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally

Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .