CHEMISTRY HIGH SCHOOL

In which of these substances are the molecules probably moving most quickly?solid iron at −45°C
solid iron at 300°C
liquid iron at 1600°C
liquid iron at 1800°C

Answers

Answer 1
Answer: The substance with molecules that are probably moving most quickly is liquid iron at 1800°C. This is because the particles of the liquid iron can move or slide past each other due to the small space available for movement. It cannot be compressed further due to the repulsive forces that acts between them. And also, the temperature is increases which causes for more thermal vibration of atoms.
Answer 2
Answer:

Answer:

The answer is D

Explanation:

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The noble-gas notation for tin (Sn) will contain the symbol

Answers

The noble gas notation is as follows- you must start with the noble gas that is before the element which in this case is Krypton and then from there you continue the electron configuration as follows- [Kr] 5s^2 4d^10 5p^2

its Kr on edg. i just took the pretest

Why is it important to know your variables when conducting an investigatory problem  ?

Answers

You can harm ur self if you dont know variables . Bcs the values of  variables should limit.

A quantity of gas under a pressure of 302kpa has a volume of 600cm3. The pressure is increased to 604kPa, while the temperature is kept constant. What is the new volume?

Answers

Answer:

V₂ = 300  cm³

Explanation:

Given data:

Initial pressure = 302 KPa

Initial volume = 600 cm³

Final pressure = 604 KPa

Final volume = ?

Solution:

The given problem will be solved through the Boly's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

302 KPa × 600 cm³ = 604 KPa× V₂

V₂ = 181200 KPa.cm³ / 604 KPa

V₂ = 300  cm³

How is the electron sea model of metallic bonding different from the band theory? How are they the same? Give at least one similarity and one difference between the models

Answers

The electron sea model states that the metal atoms are packed, relatively densely, into their crystal structure so that the outer electrons of each metal atom can be shared by all other atoms near enough to share. 

With this "sea of electrons" electrical current, which is a flow of electrons, is best explained because the electrons in a metal are already "flowing" around every metal atom in the crystal and can then freely flow through the metal. it's the same thing with heat. because the electrons are 'free' in metallic compounds and shared by all metal atoms, heat is transferred just as well. Malleability and ductility are explained by this because even though metals are relatively dense, they aren't so dense that they cannot be made to be closer together. because the outer electrons are not rigidly held in place by nuclear charge or strict crystal structure, metals are easily, some more than others, pounded into shape or drawn into wire.

Electron sea model: Electrons all have approximately the same energy.

Band theory: Electrons move among orbitals of different energies.

Both models: Electrons move freely among atoms (delocalized).

is the answer on edgeunuity

What is the maximum number of covalent bonds that can be formed by one carbon atom? 1 2 3 4

Answers

The maximum number of covalent bonds formed by a single carbon atom is 4

Define the law of conservation of charge and provide an example.Define opposite charges attract and like charges repel and provide an example.

Define Electricity along with an example.

Answers

Answer:

Conservation of Charge is the principle that the total electric charge in an isolated system never changes. The net quantity of electric charge, the amount of positive charge minus the amount of negative charge in the universe, is always conserved.
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