Distilled water has the a neutral ph. Pure water always has a ph of 7.
Answer:
It's nitrogen
Explanation:
cuz it has valence 3 and a diatomic gas at room temperature
<span>the average atomic mass of this element is 39.95 u</span>
Answer:
C) Chemical changes involve formation of a new substance while physical change only impacts appearance or form.
Explanation:
The obvious difference between a chemical change and physical change is that in a chemical change new substances are produced while in a physical change, the form of the compounds are altered.
- Most phase changes are products of physical changes. Such changes are easily reversible.
- In a chemical change, a new kind of matter is formed. It is accompanied by energy changes.
- The process is not easily reversible.
Do you know the formula? I can’t find it.
