How would a system in which both matter and energy are exchanged freely between the system and the surroundings be classified?

Which statements about oxygen and nitrogen are true? Select all the correct answers. a. They are both normally found as gases in the atmosphere. b. They can be either liquids or gases. c. They turn from gas to liquid at the same temperature. d.

Which compound is insoluble in water? (1) KOH (3) Na3PO4 (2) NH4Cl (4) PbSO4

How are magic minerals different from Felsic minerals? A. Mafic minerals contains lower levels of iron and magnesium. B. Mafic minerals contain more dark-colored, high-density minerals C.

The molar mass of aniline is 93 g/mol. what is its molecular formula

State Lamont's Hypothesis and determine if the hypothesis was supported by the data. Lamont knew that water made things look larger. He wondered what other liquids such as alcohol and glycerin would do.

People sitting around a campfire are able to feel the heat from the fire. How are the people able to feel the heat from the fire without touching the fire?

An atom of oxygen (atomic number 8) with an atomic mass of 16 would have how many neutrons?

Chlorophyll reflects which of these colors? a. red b. blue c. green d. yellow

Extracting oil from shale deposits a has been initiated on a large scale in the United States and will soon surpass Canada's production. b involves removing and refining waxy hydrocarbons called kerogen.

Which shows the levels of organization within an ecosystem from largest to smallest?