An urban area is characterized by _____.A) a dense human population
B)farm land
C)highways
D)public transportation

Answers

Answer 1

Answer:

Answer: Option (A) is the correct answer.

Explanation:

An urban area is an area which is developed and it is a place where people can get almost all the things of their need easily.

Therefore, more an more people would like to live in an urban area as there will be more resources which can make people's work easy.

Hence, we can conclude that out of the given options an urban area is characterized by a dense human population.

Answer 2

Answer: A) A dense human population

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Keisha finds instructions for a demonstration on gas laws.1. Place a small marshmallow in a large plastic syringe. 2. Cap the syringe tightly. 3. Pull the plunger back to double the volume of gas in the syringe. Which best describes the purpose and outcome of the demonstration?
What kind of bond is in the picture

The light emitted from a flame is produced when electrons in an excited state(1) absorb energy as they move to lower energy states
(2) absorb energy as they move to higher energy states
(3) release energy as they move to lower energy states
(4) release energy as they move to higher energy states

Answers

Electrons in their ground state when excited absorb energy and move to higher energy states.
Absorption is when energy is absorbed by electrons and they move to a higher energy state
Emission is when electrons release that absorbed energy and move to a lower energy state
This release of energy results in emission of light from a flame
The correct answer is
Release energy as they move to lower energy states

The light emitted from a flame is produced when electrons in an excited state absorb energy as they move to higher energy states. Thus option 2 is correct.

What is energy level diagram?

Energy level diagram is defined as a graphical illustration of the energies of an atom's or molecule's various orbitals.

The energy level diagram is typically shown as a sequence of horizontal lines, with each line representing an orbital.

It can also be defined as an electron shell, or energy level, can be visualized as an orbit of electrons surrounding an atom's nucleus.

Electrons absorb energy and move from ground state to exited state, and come back to original state by releasing energy.

Thus, the light emitted from a flame is produced when electrons in an excited state absorb energy as they move to higher energy states. Thus option 2 is correct.

To learn more about energy level diagram, refer to the link below:

brainly.com/question/21219604

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A substance that can accept a pair of electrons to form a covalent bond is known as a lewis ____.a. base
b. buffer
c. acid
d. catalyst

Answers

c. acid
have a nice day

An atom of argon rarely bonds to an atom of another element because an argon atom has(1) 8 valence electrons
(2) 2 electrons in the first shell
(3) 3 electron shells
(4) 22 neutrons

Answers

The answer is (1) 8 valence electrons. Argon, being a noble gas, already possesses a full octet of valence electrons and is, therefore, very, very stable. It has an almost indomitable tendency to retain that octet. That is why it so rarely participates in any sort of bonding.

A sample of CO2(s) and a sample of CO2(g) differ in their1) chemical compositions
2) empirical formulas
3) molecular structures
4) physical properties

Answers

The correct answer is D.
CO2(s) is a solid.
CO2(g) means it is gas.

So they differ in their physical properties.
Physical propertiers means that they differ in their look.

a) NaClO3 -> NaCl + O2------------------------DESCOMPOSICION b) HNO3 +Fe -> H2 + Fe (NO3)2------------SIMPLE SUSTITUCION c) Kl + Pb (NO3)2 -> Pbl2 + KNO3--------DOBLE SUSTITUCION d) C + O2 -> CO2-----------------------COMBINACION o SINTESIS e) Ca(HCO3)2 -> CaCO3 + CO2 + H2O--no estoy seguro pero en todo caso DESCOMPOSICION

Answers

a) 2 NaClO₃= 2 NaCl + 3 O₂ ( decomposition )

b) 2 HNO₃ + Fe = H₂ + Fe(NO₃)₂ ( single replacement )

c) 2 Kl + Pb(NO₃)₂ -> Pbl₂ + 2 KNO₃ ( double replacement )

d) C + O₂ -> CO₂ ( synthesis )

e) Ca(HCO₃)₂ = CaCO₃ + CO₂ + H₂O ( decomposition)

hope this helps!

Ammonia is a weak base because it produces ___ ions in solution