A closed system is:

completely closed to the outside environment.

only slightly exposed to the outside environment.

in constant exchange with the environment

completely exposed to the outside environment.

Which statement about metamorphic and sedimentary rocks is true? A) Both types of rocks form under high temperature, but sedimentary rocks also require high heat. B) Only metamorphic rocks show signs of rock layers.

34. What is the percent by mass of solute in a saturated solution of KClO3 at a temperature of 60°C? (1) 0.218% (3) 21.8% (2) 0.28% (4) 28%

What two general products do combustion reactions create?

Major species present when fructose is dissolved in water

What else is necessary in order for a hydrogen atom in a molecule to participate in a hydrogen bond?

9.86 x 10²⁸ O-atoms require what volume (L) N₂O₂ at STP?

What is a group of elements that form salts called

Which number represents an acidic pH, 4 or 9?

What would make the risk of these cancers even worse for someone who drinks alcohol?

For what reasons would modern scientists accept dalton's atomic theory but not the idea of an atom proposed by the greek philosophers?