Answer:
hair is a physical change.
Cooking is a physical and chemical change.
Ice cream melting in the sun is a physical change.
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Answer:
Pacific Ring of Fire.
Explanation:
Japan sits in one of the most active earthquake zones on the planet: the Pacific Ring of Fire.
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Thee question is incomplete; the complete question is;
Which elements do not strictly follow the octet rule when they appear in the Lewis structure of a molecule?
Select one or more:
A: Chlorine
B: Carbon
C: Hydrogen
D: Sulfur
E: Fluorine
F: Oxygen
Answer:
chlorine
sulphur
Explanation:
The octet rule states that, for atoms to be stable, they must have eight electrons on their outermost shells.
This rule is not strictly followed by some elements such as sulphur and chlorine. The atoms of these elements can sometimes expand their octet by utilizing the d-orbitals found in the third principal energy level and beyond.
These leads to formation of compounds in which the central atom has more than eight electrons in its outermost shell.
Answer:
The density of solution is 1.283 g/mL.
Explanation:
Molarity of the KOH before dilution = 
Volume of the solution before dilution = 
Molarity of the KOH after dilution = 
Volume of the solution after dilution = 
(1 mL = 0.001 L)
Mass of 0.2076 moles of KOH:
0.2076 mol × 56 g/mol = 11.6256 g
Mass of KOH is solution = 11.6265 g
Mass of the solution = M
Mass percentage of solution = 30.0% of KOH
M = 38.755 g
Density of the solution , d= 
The density of solution is 1.283 g/mL.
1. B. Orbital Shape
2. C. counterclockwise
3. D. Electrons enter orbitals of lowest energy first
4. C. 6
5. C. 2
6. A. Filled energy sublevels
