Replenishable natural resources, like groundwater and oxygen, are purified when they move through Earth's cycles. Which of the following describes how groundwater is
purified in the water cycle?

A.
Surface runoff is purified as it flows through streams and rivers into lakes.
B.
When water condenses in clouds, it is purified as precipitation is produced.
C.
As water evaporates from oceans, it is purified and becomes water vapor.
D.
Rain and snow is purified during infiltration through layers of soil and rock

Acetic acid, hc2h3o2, dissolves and completely dissociates in water and a solvation sphere of water molecules forms around the ions. this solute-solvent interaction

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull

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 .