Which phrase best describes the vapor point of a substance?
the strength of the bonds between molecules of a substance that is in a gaseous state
the amount of heat energy required to change a substance from a liquid to a gas
the temperature at which additional heat energy causes the substance to change from a liquid to a gas
the average kinetic energy of the molecules of a substance in its gaseous state

Which Phrase Best Describes The Vapor Point Of A Substance?the Strength Of The Bonds Between Molecules

Answers

Answer 1

The phrase which best describes the vapor point of a substance is Choice C; the temperature at which additional heat energy causes the substance to change from a liquid to a gas.

The vapour point of a substance by definition is the state of a substance at which upon addition of any amount of heat energy; he substance undergoes a phase change from liquid to solid.

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Related Questions

Why is lead(II) nitrate: “Pb(NO3)2” and not “Pb3NO2”?

Just a bit confused because it looks a bit funny compared to how I learned how to write compounds.

Answers

Explanation:

this is because the combining capacity, ie valency, of Pb is 2 of which NO3 is 1. So, when they will combine by cross method, the compound become Pb(NO3)2 (lead II nitrate).

hope this helps you.

Which of the following requires the most input of energy?



Ovaporizing a substance

O melting a substance

O decreasing the temperature of the substance by 1°C

O raising the temperature of the substance by 1°C​

Answers

Answer:

D ✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔

What is a single layer of graphite called
Asking for GCSE Chemistry

Answers

Answer:

GRAPHENE is a single layer of graphite

Explanation:

each carbon atom bonded to 3 other carbon atoms forming a hexagonal lattice

The specific heat capacity of liquid water is 4.18 J/g-K. How many joules of heat are needed to raise the temperature of 5.00 g of water from 22.0 °C to 57.0 °C?

Answers

Answer:

731.5j.

Explanation:

Basic Formula : Q = mcT.

Q - Heat gained or lost.

m - mass of the given substance.

c - specific heat capacity.

T - Change in temperature ( it often has a delta(triangle) before it.

so now we are directly asked to find the heat.

Q = mcT

m= 5g

c = 4.18

but T = 35k which means 35 kelvin.

why? because you will need to convert the two given initial and final temperatures inorder to cancel the unit kelvin out from the formula above. the target is simply to make the unit J - joule be left alone.

now We convert celsius temperature to kelvin by adding a constant of 273.15 approximately 273.

therefore - Tk = Tc + 273

which will be equivalent to 295k for the initial temperature and 330k for the final.

now granted...keep in mind to use the CHANGE in temperature which is the difference of the 2 kelvin temperatures we just converted

so T = 330k - 295k = 35k

then just substitute everything in the very 1st formula i stated above.

Q = mcT = 5 x 4.18 x 35 = 731.5 J

peace to you.

Excited hydrogen atoms emit light in the ultraviolet at 2.47x1015Hz. What is the
energy of a single photon with this frequency?

Answers

The energy of a single photon of this frequency is 1.638 × 10⁻¹⁸ J

Using Planck's equation, the energy of the photon E = hf where h = Planck's constant = 6.63 × 10⁻³⁴ Js and f = frequency of ultraviolet light = 2.47 × 10⁻¹⁵ Hz.

Substituting the values of the variables into the equation, we have

E = hf

E = 6.63 × 10⁻³⁴ Js × 2.47 × 10¹⁵ Hz.

E = 16.3761 × 10⁻¹⁹ J

E = 1.63761 × 10⁻¹⁸ J

E ≅ 1.638 × 10⁻¹⁸ J

So, the energy of a single photon of this frequency is 1.638 × 10⁻¹⁸ J

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what kind of molecule is a polymer??

Answers

polymer is a plastic

Answer:

macromolecules

Explanation:

Polymer is composed of molecules called macromolecules that have multiple of simpler chemical units called monomers.

What is friction? A _______ between an object and the _______ it's moving over.

Answers

Answer:

A force between an object and the surface it's moving over.

Explanation:

hope this helps. . . <3

good luck!    uωu

8)
What mass of hydrogen is needed to react with 32 g of copper oxide?
CuO + H2 → Cu + H2O

Answers

Answer:

1.22gram of hydrogen is needed to react

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore,  0.40 g mass of hydrogen is needed to react with 32 g of copper oxide.

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

CuO + H[tex]_2[/tex]→ Cu + H[tex]_2[/tex]O

mole of copper oxide=  32 /79.54

                                    =0.40 mole

The mole ratio between copper oxide and hydrogen is 1:1

mole of hydrogen= 0.40 mole

mass of hydrogen = 0.40 mole×1g/mol

                              = 0.40 g

Therefore, 0.40 g mass of hydrogen is needed to react with 32 g of copper oxide.

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help<3
If a solid object is taken from Earth far into space, which of the following measurements of the object
will change the most?
A. density
B. mass
C. volume
D. weight

Answers

Answer:

D. weight

[tex] \: [/tex]

Question:-

If a solid object is taken from Earth far into space, which of the following measurements of the object will change the most?

A. density

B. mass

C. volume

D. weight

Answer:-

option D. weight

Explanation:-

Because the gravity of the planet/object changes, the weight of the object changes when you move it away from the earth or place it on another planet.

However, the mass of the object remains the same regardless of whether it is on Earth or outer space.

. What were the factors responsible for the change of dead organic matter into fossil fuels?​

Answers

Given enough pressure, organic matter can also become natural gas. Heat and pressure are the two main forces that transform organic matter into fossil fuels.

Mark Brainliest please

How are the forces acting on an airplanes flying similar to the forces acting on a boat moving through water?

Answers

Answer: The four forces acting on an aircraft in straight-and-level, unaccelerated flight are thrust, drag, lift, and weight.

Explanation:

Please help I will Mark Branlist
please justify and explain aswell

Answers

A. ionic (donates an electron to the other atom in the bond)

B. covalent (electrons are shared equally)

C. polar (unequal electronegativity)

hope this helps!

A clear liquid in an open container is allowed to evaporate. After three days, a solid is left in the container. Was the clear
liquid an element, a compound, or a mixture?

Answers

The liquid did not chemically bond after 3 days, therefor it is a mixture.

Hope this helps!

which is a better conductor of eclectic current: a solid ionic compound or a melted ionic compound

Answers

Answer:

Melted ionic compounds

Explanation:

This is because the ions have dissociated and for electricity to pass through a substance it is important that the substance must have ions present in it.

An increase in which property would cause an electromagnetic wave's energy
to increase?
A. Wavelength
B. Mass
C. Frequency
D. Speed
SUBMIT

Answers

C. Answer correct I think…


How many grams or H20 are produced if 25 grams of HCl are used?

Answers

Answer:

15.1 grams

Explanation:

Answer:

I did some research and found some things here, its another sight sort of like brainly.  Hopefully this helps!

Explanation:

https://socratic.org/questions/how-many-grams-of-potassium-chloride-are-produced-if-25-0g-of-potassium-chlorate

If you begin with a saturated solution of sugar dissolved in water, and then you heat the solution, what type of solution will result

Answers

After beginning the experiment with a saturated solution, then increasing the heat, we will be left with an unsaturated solution.

To obtain the saturated solution, we must dissolve sugar in the water. We can say that the solution has become saturated when the solution is no longer able to dissolve more sugar. It has reached its capacity for the solute that it can dissolve in these conditions.

However, the temperature of a solution has an effect on the dissolving limit of the solution. That is, when a solution is heated it becomes able to dissolve more solute. Therefore, if we were to heat a saturated solution, it will be able to dissolve more solute and therefore will no longer be at its limit, meaning it is no longer a saturated solution. It has become unsaturated.

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A metal ball has a mass of 6 kg and a volume of 42 cubic meters. What is its density

Answers

Answer:

0.143kg/m^3

Explanation:

density= mass / volume

Answer:

1/7 kg/cubic metres

Explanation:

Here, Density=mass /volume

=6/42

=1/7 kg/cubic metres.

life situation scenario that portrays the modernization and professionalism of the Philippine National Police Organization as per discussed under RA 6975.

Answers

Answer:

members shall perform their duties with integrity, intelligence and competence in the application of specialized skill and technical knowledge with excellence and expertise.

Explanation:

any members on duty should be wiling and ready to help at all times

Why does scientists use atomic watch?​

Answers

Answer:

atomic watch

Explanation:

it is used for the measurement of time.

What type of flower structures do you see in a ovary in a flower

Answers

Answer:

The ovary contains ovules

Explanation:

Ovules is a structure you see in a ovary flower

what is the answer to this:magnesium+oxygen

Answers

A student balanced the chemical equation Mg + O2 →MgO by writing Mg + O2 → MgO2.

Answer:

magnesium oxide

Explanation:

Explain The element lithium has two common isotopes: Li–6 and Li–7 If the average atomic mass of lithium is 6.94004 u, determine its percent isotopic step by step please urgently

Answers

Answer:

%Li-6 = 5.996% & %Li-7 = 94.004%

Explanation:

let X₁ = Li-6 & X₂ = Li-7 where Xₙ = mole fraction

X₁ + X₂ = 1 => X₁ = 1 - X₂

6·X₁ + 7·X₂ = 6.94004

=> 6(1 - X₂) + 7·X₂ = 6.94004

=> 6 - 6·X₂ + 7·X₂ = 6.94004

=> 6 + X₂ = 6.94004

X₂ = 6.94004 - 6 = 0.94004 => %X₂ = %Li-7 = 94.004%

X₁ = 1.00000 - 0.94004 = 0.05996 => %X₁ = %Li-6 = 5.996%

A significant amount of methane (CH4) is trapped underground or under marine sediments as Select one: a. methane hydrates. b. liquid methane. c. inorganic carbon. d. natural gas.

Answers

Methane is found under the ground or under marine sediments  as natural gas which is mined along with crude oil.

Methane is an alkane and has the formula CH4. It is most commonly used as fuel. Methane is the gas that has been renowned as being responsible for explosion in coal mines.

Methane is found under the ground as natural gas which is mined along with crude oil. Large deposit of natural gas is found in many countries in Asia, Africa and the middle east.

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Write the electron configuration for the metal in group 5A and the alkali metal in period 2

Will give brainliest if answered fast :)

Answers

Answer:

metal in group 5A is bismuth

electronic configuration : 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^2 5p^6 4f^14 5d^10 6s^2 6p3

alkali metal in period 2 is lithium

1s^2 2s^ 1

Explanation:

The following balanced equation shows the formation of water. 2H2 O2 → 2H2O How many moles of oxygen (O2) are required to react completely with 1. 67 mol H2? 0. 835 mol O2 1. 67 mol O2 3. 34 mol O2.

Answers

Answer:

CO2 carbon dioxide emissions

H20 mental breakdown

02 is form of a kind

answer is acid + alkaline equal to salt and water

if the student finds the weight of the sodium chloride to be 28.5g,calculate the number of particles.(Na=23,Cl=35.5)

Answers

Answer:

2.93×10^23

Explanation:

molecular formula of NaCl is 58.5

58.5gof NaCl=6.023×10^23

28.5g of NaCl= 6.023×10^23÷58.5×28.5

= 2.93×10^23

What type of bond is between NaCL?

Answers

Answer:

Ionic Bonds

Explanation:

Ionic bonds usually occur between metal and nonmetal ions. For example, sodium (Na), a metal, and chloride (Cl), a nonmetal, form an ionic bond to make NaCl.

a) Identify which one of the particles is
I) an anion.

2) a cation ​

Answers

Answer: Particle F is an anion, and particle E is a cation

Explanation:

A particle is a cation if it has more protons  than  electrons.

A particle is an anion if it has more electrons than protons.

Hope it helps :) and let me know if you want me to elaborate.

what happens when ice changes to water the link up of the atoms

Answers

Answer:

Removing heat causes water (a liquid) to freeze to form ice (a solid). When water changes to a solid or a gas, we say it changes to a different state of matter. ... This causes the hydrogen atoms in one water molecule to be attracted to the oxygen atom in another water molecule.

Explanation:

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