For each statement below, indicate whether it is true or false.
1. breaking the hydrogen bond between 2 water molecules is called dissociation.
2. when water dissociates, an oxygen atom separates from the rest of the molecule.
3. the hydroxide ion has an overall charge of negative one.
4. a hydrogen ion is the same as a proton.
5. when a hydrogen ion separates from a water molecule, it usually combines with another water molecule to form a hydronium ion.
6. a hydronium ion has the formula h2o+.
7. in pure water, at 25oc, about 10% of the water molecules are dissociated at any given time.
8. in pure water, the concentration of hydrogen ions always equals the concentration of hydroxide ions.
9. in pure water, the concentration of hydrogen ions is 1 x 107 molar.
10. water dissociates into oppositely charged ions.

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101

answer; neuropathic pain;

answer;

-vessels in the chest

the diagnosis of angina pectoris literally means "vessels in the chest"

explanation;

-angina pectoris is the medical term for chest pain or discomfort due to coronary heart disease.it is the chest pain due to an inadequate supply of oxygen to the heart muscle. the pain is typically severe and crushing, and it is characterized by a feeling of pressure and suffocation just behind the breastbone.

agina pectoris is caused by reduced blood flow to your heart muscle. the blood carries oxygen, which the heart muscle needs to survive. when the heart muscle isn't getting enough oxygen, it causes a condition called ischemia