Physical changes are changes affecting the form of a chemical substance, but not it`s chemical composition.
A physical change, changes the following:
-appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity, and many others.
Answer:
C. density(the degree of compactness of a substance)
I think the answer should be 44 mol H2O
64.0g C2H2 * 1 mol/26g C2H2*18 mol H2O/1 mol
Answer:
About 366 joules
Explanation:
PEg = mgh
PEg = 4.24(8.81) * 9.81
PEg = 37.3544 * 9.81
PEg = 366.446664, which rounds to 366 joules.
1 － valence electrons
2 － electrons
3 － two electrons
4 － eight electrons
5 － eighteen electrons
6 － nucleus
7 － protons
8 － neutrons
9 － shell or energy level
10－ atomic number
11 － element symbol
12 － atomic name
13 － atomic mass
