Select the correct answer.
A student 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?
A.
The container contains 12 grams of liquid water and no ice.
B.
The container contains 12 grams of ice and no liquid water.
C.
The container contains 8 grams of liquid water and no ice.
D.
The container contains 8 grams of ice and 4 grams of liquid water.
E.
The container contains 8 grams of liquid water and 4 grams of water vapor.

Which statement correctly describes the phosphate ion, ? it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.