Chemistry High School

Which of these has the greatest compressibility?

gas

liquid

solid

They are all equal.

Answers

Answer 1
Gas is the most compressible because the atoms have more space in between. solids on the other hand, are the least compressible because their atoms are really closely packed.

Related Questions

Which compound is least soluble in water at 60 degrees Celsius

Answers

potassium chlorate (KClO3)
Potassium Chlorine/Chlorate

Click here my friend

Answers

OKAI I WILL DO THAT,,,,

if a material is ductile, it is most likely a __________

Answers

Your answer would be metal 

Answer:

It is known that metals are malleable and ductile

so your answer would be metal

Explanation:

It is known that metals are malleable and ductile. Whereas non-metals are neither malleable nor ductile. On the other hand, metalloids are the elements which contain properties similar to both metals and non-metals.

Due to the Earth's shape and orientation, areas near the equator receive the greatest amount of energy from the Sun. Ocean currents
A. move only away from the equator as a result.
B. help to distribute this energy by warming other regions of the globe.
C. move only toward the equator as a result.
D. keep this energy concentrated in one region of the globe.

Answers

B. help to distribute this energy by warming other regions of the globe.

Welcome.

Areas near the equator receive the greatest amount of energy from the Sun because Ocean currents help in distributing this energy by warming up other regions of the globe. Thus, the correct option is B.

What is the effect of Ocean currents?

Ocean currents including the ocean conveyor belt play an important role in the determination of how the ocean distributes heat energy throughout the planet Earth, thereby regulating and stabilizing the climate patterns in different regions of the planet.

Warm current moves away from the equator towards the poles whereas the cold currents concurrently move towards the equator. This process of movement of current waves is known as thermohaline circulation. The cold currents due to their higher density move in the great depth of the oceans while the warmer currents are on the surface due to their relatively lower density.

Therefore, the correct option is B.

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How many grams of co2 are in 6 mol of the compound and the units?

Answers

n(CO₂) = 6 mol.
M(CO₂) = 12 g/mol + 2 · 16 g/mol.
M(CO₂) = 44 g/mol.
m(CO₂) = n(CO₂) · M(CO₂).
m(CO₂) = 6 mol · 44 g/mol.
m(CO₂) = 264 g.
n(CO₂)- amount of substance of carbon dioxide.
m(CO₂) - mass of carbon dioxide.
M(CO₂) - molar mass of carbon dioxide.

Which of these is an example of calcium carbonate? diamond graphite shelles of snails water

Answers

shelles of snails.
diamond and graphite are carbon allotropes
and water is water XD

The shells of snails is an example of calcium carbonate. option C is correct.

What are shells?

The shells are made up of calcium carbonate (CaCO3) compounds to protect the eggs or the embryo inside the egg or the soft body of the organism. the main purpose is to protect the body inside the shell from the harsh environment which can damage the body.

The eggshell of snail shell can be used as fillers in the polymer industries and it is the main source of calcium carbonate by crushing the shells we obtain it in powder form it is much rich in calcium.

The main function of the shell is to protect the body inside from the outer environment and for the growth of the body.

Therefore, the shells of snails are an example of calcium carbonate. option C is correct.

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Which of the following is the best description of a gaseous substance?

Answers

The best description of a gaseous substance among the given options is It has no definite shape or volume, and will expand indefinitely. The correct option is an option (c).

Gaseous substances do not have a definite shape or volume. They take shape and fill the entire space of the container they are in. They can expand indefinitely to occupy any available space. This description accurately represents the characteristics of a gaseous substance.

Therefore, It has no definite shape or volume and will expand indefinitely. The correct option is an option (c).

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The complete question is:

Which of the following is the best description of a gaseous substance?

It has no shape of its own but has a definite volume.

It has no definite shape or volume and will expand indefinitely.

It holds its shape without outside restraint.

It is the result of a chemical reaction involving two or more elements.

Final answer:

A gaseous substance is best described as having no definite shape or volume, expanding to fill the volume of any container it is in.

Explanation:

The best description of a gaseous substance is that it has no definite shape or volume, and will expand indefinitely to fill any container. Unlike solids that hold their shape without outside restraint, and liquids that have a definite volume but take the shape of their container, gases are characterized by particles that move about randomly in space with enough energy to completely overcome intermolecular interactions. This significant characteristic delineates a gas from other phases of matter, as it occupies the entire space available, regardless of the size of the container.

How is platinum used to help regulate the release of harmful gases from cars?

Answers

platinum is used in catalytic converters so it causes harfull gas.

Answer:

Platinum is used as a catalytic converter

Explanation:

At present, internal combustion vehicles are equipped with an element called catalytic converter, which is one of the most important components for the control of emissions of polluting gases resulting from combustion produced by engines. Its main function is to transform the polluting gases resulting from the burning of fuel into other gases that are more environmentally friendly. This element is located under the vehicle along the exhaust system pipe after the oxygen sensor.

There are different types of catalytic converters, but modern vehicles are equipped with three-way catalytic converters, referring to the three kinds of pollutant gases that must be reduced (CO, HC and NOX). The converter uses two types of catalysts, one of reduction and another of oxidation. Both consist of a ceramic structure covered with normally platinum, rhodium and palladium metal. The main idea was to create a structure that exposes the catalyst surface to the maximum against the flow of exhaust gases, also minimizing the amount of catalyst required since it is very expensive.

What is incorrect about the atomic orbital arrangement of electrons in this model? How should they be arranged?

Answers

Answer:

The model is incorrect because the first main energy level can only have two electrons and it shows five.

The electrons should be arranged in two concentric circles, each for one main energy level: 2 electrons must be on the inner circle (first energy level) and 3 electrons on the outer circle (second main energy level).

Explanation:

This model is used to indicate the electrons according to the main energy level (main quantum number).

The main energy levels or quantum numbers anre 1, 2, 3, 4, 5, 6, 7, .....

And these are the number of electrons that can be on each of those energy levels:

Main quantum number          maximim number of electrons

1                                                   2
2                                                   8
3                                                 18
4                                                 32

The atom shown has  five electrons. Accorgin with the table above, only two of those electrons may be in the first main energy level, the other three go on the second level.

Therefore, the model is incorrect because the first main energy level can only have two electrons and it shows five.

This model must show two concentric circles to arrange the five electrons,each for every main energy level or main quantum number, then 2 electrons must be arranged on the inner circle and 3 electrons on the outer circle.

The substance that works as a reactant in an enzyme catalyzed reaction is called the

Answers

The substance that works as a reactant in an enzyme catalyzed reaction is called the substrate

A student crushes some calcium supplement tablets and dissolves them in water. The resulting solution feels slippery and has a slightly bitter taste. Are the supplement tablets most likely to be acids or bases?

Answers

Answer is: the supplement tablets most likely to be bases.
Acids and bases have opposite properties and have the ability to neutralize each other. Acids taste sour, give sharp stinging pain in a wound and react with metals to produce hydrogen gas.
Bases turn red litmus paper blue and acids turn blue litmus paper red.


Answer:

bases

Explanation:

Why do X-Ray technicians stand behind a shield when giving X-Rays to patients?
a.because large doses of X-Rays cause blindness
b.because they can more accurately see the patient's bones
c.because they need to protect themselves from patient disease
d.because large doses of X-Rays are known to cause cell damage and cancers

Answers

The answer is D.
When one is exposed to large doses of X-Rays, this can cause cell damages or even cancer.

The following reaction shows the process of rusting. 4Fe + 3O 2 2Fe 2 O 3 This chemical reaction should be classified as _____.

Answers

Ionic bonding I think it is

Because electrons move freely in metals, metals are____

Answers

They are conductors because since they move freely around in metals it creates energy which will act as a conductor

The metals are defined as those substances which can form metallic bonds. Iron, copper, etc. are metals. Because electrons move freely in metals, metals are conductors of heat and electricity.

What is a metal?

The metals are known as those substances which can donate electrons. They are electropositive in nature. An opaque, hard, shiny substances which can conduct heat and electricity due to the presence of free electrons are metals. All metals are malleable and ductile.

The metals contain one or two valence electrons. In order to attain stability they transfer the electrons. When these valence electrons are transferred rapidly to form a compound, there is a continuous flow of electrons in the lattice of compound.

Thus free electrons in metals are obtained due to their ability to transfer valence electrons and to achieve electrical neutrality.

Thus metals are conductors of heat and electricity.

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A 30.0-ml volume of 0.50 m ch3cooh (ka=1.8×10−5) was titrated with 0.50 m naoh. calculate the ph after addition of 30.0 ml of naoh at 25 ∘c.

Answers

According to this reaction:
CH3COOH + OH-↔ CH3COO- + H2O
we have to get the moles of acetic acid:
moles of acetic acid = volume of acetic acid per L * molarity
                                  = 0.03 L * 0.5 M = 0.015 m
and the moles of NaOH = volume of NaOH * molarity
                                         = 0.03 L * 0.5M = 0.015 m
and when the total volume = volume of acetic acid + volume of NaOH
                                              = 0.03L + 0.03L = 0.06 L
So we can get the molarity of CH3COO- = moles of CH3COO/ total volume
                                                                     = 0.015 mol / 0.06 L =0.25 M
and for the reaction :
                       CH3COO- + H2O ↔ CH3COOH + OH-
initial                0.25                                 0               0
equilibrium (0.25 - X)                               X                X

and when Kw = 1 X 10^-14 and Ka = 1.8 X 10^-5 and Kb = Kw/Ka so:
Kw/Ka = [CH2COOH][OH]/[CH3COO]
(1x10^-14/1.8x10^-5) = X^2 / (0.25-X)
5.6x10^-10 = X^2/(0.25-X)
1.12 - (5.6x10^-10 X) = X^2
∴X = 1.2x10^-5 ∴[OH-] = 1.2x10^-5 M
when POH = - ㏒[OH-]
         POH = -㏒(1.2x10^-5) = 4.9

and when POH + PH = 14 
∴PH = 14- POH = 14 - 4.9 = 9.1

The weakest hydrogen line stars are classified as:

Class A
Class M
Class Q
Class Z

Answers

the answer is Q hope this helps

The answer would be Class Q!

What is the name of CaCO2

Answers

Calcium--Cobalt(1/2)

PLEASE HELP!Suppose you begin with 1.50~g of the hydrate copper(II)sulfate · x-hydrate (CuSO4· x H2O), where x is an integer. After dehydration you find that you are left with 0.96~g of the an-hydrate CuSO4. What is the unknown integer x. Round your answer to the nearest integer, enter only an integer.
Suppose you begin with of the hydrate KAl(SO4)2 · 12H2O. After dehydration you find that you are left with 3.0~g of the an-hydrate KAl(SO4)2. How many grams did you start with? Write the value to the correct number of significance figures.

Answers

For first problem:
mass of water = 1.5 g - 0.96 g = 0.54 g
mole of water = [tex] \frac{0.54 g}{18 g/mole} = 0.3 mol[/tex]
mole of CuSO₄ = [tex] \frac{0.96 g}{159.6 g/mole} = 6 x 10^{-3} mol [/tex]
mole of water / mole of anhydrate = [tex] \frac{0.03}{6 x 10^{-3}} = 5 [/tex] 
so x equal 5

For second problem:
After dehydration 12 H₂O evaporated decreasing mass by (12 x 18) = 216 g/mole
number of moles of KAl(SO₄)₂ = [tex] \frac{3}{258.2} = 0.0116 mol [/tex]
mass of evaporated water = 216 x 0.0116 = 2.5 g
Initial weight = 2.5 g + 3 g = 5.5 g

20+ points
Balance the equation, if necessary, for the reaction between iron and oxygen
(Please see attachment)
If you could help with both problems that would be great, Thanks!

Answers

1. 4Fe + 3O2 yields 2Fe2O3 (some of the numbers are subscripts, just to let you know)

2. Its a combination reaction

How many milliliters of a 0.7% stock solution are required to make 2 l of 0.2% solution? how many ml of solvent will be required to carry out the dilution?

Answers

1. To solve this question, you need to equalize the mass of solute for both solution. The calculation would be:
mass of solute= volume*concentration

mass1=mass2
volume1 * concentration1 = volume2 * concentration2
volume1 * 0.7%= 2L *(1000ml/L) * 0.2%
volume1 = 2000ml * (0.2%/0.7%)
volume1= 571.429 ml

2. Since you already have the volume of stock needed, you just need to subtract it from the total solution volume to count the number of solvents needed.
new solution volume= stock volume + diluting solvent volume
2L * 2000ml/L =  571.429ml + diluting solvent volume
diluting solvent volume= 2000ml- 571.429 ml= 1428.571ml

What is the ratio of Fe3+ ions to O2- ions in a neutral compound?
1:2
2:1
2:3
3:2,

Answers

The answer is 2:3. Because the lowest common denominator of 2 and 3 is 6, we find that for every 2 Fe3+ ions, we would need 3 O2- ions to neutralize the charge. The other answers do not fit this idea, as the math doesn't then add up to come to a neutral charge.

If the concentration of h2 is doubled, will the reaction rate quadruple, double, or remain the same?

Answers

The answer depends on the rate law.

1) If the rate law is first order on H2, then:

r = K [H2] / A

Since K is a constant and you are not varying A, then the rate will double if [H2] doubles.

2) If the rate law is second order on H2, then:

r = [H2]^2 / A

Again, since K is a constant and you are no varying A, then the rate will quadruple if [H2] is doubled because:

( 2 * [H2] )^2 = 4 [H2]^2

3) If the rate law is of zero order on H2, then the rate will remain the same, because the rate does not depend of the concentration of H2.

Calculate the molecular mass of Carbon monoxide (CO) by adding the atomic mass of carbon and the atomic mass of oxygen

Answers

the molecular mass is 28.01 g/mol

The molecular mass of Carbon monoxide (CO) is 28.01 g/mol, which is the sum of the atomic mass of carbon (12.01 g/mol) and oxygen (16.00 g/mol).

The question is asking to calculate the molecular mass of Carbon monoxide (CO). To find the molecular mass, you need to add the atomic mass of carbon (C) and the atomic mass of oxygen (O).

Using the standard atomic weights for these elements, carbon has an atomic mass of approximately 12.01 g/mol and oxygen has an atomic mass of about 16.00 g/mol.

So, the molecular mass of CO would be:
12.01 g/mol (Carbon) + 16.00 g/mol (Oxygen) = 28.01 g/mol (Carbon monoxide)

Which of the following is a made of only glucose molecules?
(Points : 1)
ribose

lactose

sucrose

maltose
*** i think its B,

Answers

Hello :))

The answer is actually malotose, which is 2 glucose molecused joined by an alpha bond

Hope this helps :))

According to research, maltose is a disaccharide made of only glucose molecules.

What is maltose?

It is a moderately sweet disaccharide formed from two glucose units connected by an α bond.

This biomolecule made up of two monosaccharides is the first product obtained during the digestion of starch by alpha-amylase, and is then broken down and transformed into glucose.

Therefore, we can conclude that according to research, maltose is a disaccharide made of only glucose molecules.

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Some people think a deep tan is beautiful, but it is really the body's way of trying to protect itself from the damaging effects of the sun's radiation. Fill in the remaining parts of the table below to compare an ultraviolet photon with a photon in the visible range. (12 points)


Answers

Answer:

Visible photon

λ = 649 nm

E = 3.061 * 10^ - 23 J

B) ultraviolet photon:

γ  = 8.57 * 10^ 14 s^-1

E = 5.678 * 10^ -19 J

Explanation

1) Data:

A) visible photon

ν = 4.62 * 10 ^ 14 Hz
λ = ?
E = ?

B) Ultraviolet photon

λ = 350 nm = 350 * 10^ -9 m
ν = ?
E = ?

2) Formulae:

frequency: ν
wavelength: λ
speed of ligth: c
energy: E
h: Planck constant = 6.626 * 10^ -34 J.s

ν = c / λ
λ = c / ν
E = hν

3) Solution:

Visible photon

λ = c / ν = 3.00 * 10^ 8 m/s / 4.62 * 10 ^ 14 s^-1 = 6.49 * 10^ - 7 m = 649 nm

E = hν = 6.626 * 10 ^ - 34 J.s * 4.62 * 10 ^ 14 s^-1 = 30.61 * 10^ - 24 J = 3.061 * 10^ - 23J

Ultraviolet photon:

γ = c / λ = 3.00 * 10^ 8 m/s / (350 * 10^ -9m) = 8.57 * 10^ 14 s^-1

E = hν = h = 6.626 * 10 ^ -34J.s * 8.57 * 10^ 14 s^-1 = 5.678 * 10^ -19 J

What is the mass in grams of 0.433 mol of Ca(NO3)2

Answers

the molar mass of the components making up Ca(NO₃)₂ are as follows;
Ca - 40 g/mol
N - 14 g/mol
O - 16 g/mol
the molar mass of the compound is calculated as follows;
Ca(NO₃)₂ --> 40 + 2(14 + 16x3)
               = 164 g/mol
1 mol of the compound weighs 164 g
Therefore 0.433 mol = 164 g/mol x 0.433 mol
                                 = 71.0g
the mass of 0.433 mol of the compound is 71.0 g

Which reaction results in the greatest increase in entropy?
A. A → 2B
B. A → B
C. 2A → B
D. 3A → B

Answers

A would be the answer

The reaction that results in the greatest increase in entropy is [tex]\rm A \rightarrow 2B[/tex]. The correct answer is option A.

Entropy is a measure of the disorder or randomness of a system. The greater the number of particles in a system, the greater the entropy. A reaction that produces more particles will result in an increase in entropy.

In reaction  [tex]\rm A \rightarrow 2B[/tex], one molecule of A produces two molecules of B. This means that the number of particles in the system has increased, resulting in a greater degree of disorder or randomness and a higher entropy.

Therefore, option A. [tex]\rm A \rightarrow 2B[/tex] results in the greatest increase in entropy because it produces more particles, which results in a greater degree of disorder or randomness and a higher entropy.

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A block of metal has a volume of 14.0in3 and weighs 5.26lb .

What is its density in grams per cubic centimeter?,

Answers

Mass of block, m = 5.26 lb  
1 lb = 453.592 g
 5.26 lb = 2385.896 g
V = 14 in3
 1 in = 2.5 cm
 1 in3 = 15.625 cm3
 14 in3 = 218.75 cm3


Density = mass/volume
 = 2358.896 / 218.75
 = 10.783 g/cm3

Answer : The density of metal is [tex]10.399g/cm^3[/tex]

Explanation :

Density : It is defined as the mass of a substance contained per unit volume.

Formula used :

[tex]Density=\frac{Mass}{Volume}[/tex]

Given:

Mass of metal = 5.26 lb = 2385.896 g

conversion used : (1 lb = 453.592 g)

Volume of metal = [tex]14.0inch^3=229.419cm^3[/tex]

conversion used : [tex](1inch^3=16.3871cm^3)[/tex]

By using formula, we get:

[tex]Density=\frac{2385.896g}{229.419cm^3}[/tex]

[tex]Density=10.399g/cm^3[/tex]

Thus, the density of metal is [tex]10.399g/cm^3[/tex]

An internal combustion engine relies primarily on the efficient production of energy by the combination of oxygen (02) and gasoline (assume this is primarily octane, C8H18). Write the chemical equation for this reaction and derive the exact ratio of oxygen to octane for 100% efficiency.

Answers

Answer is: the exact ratio of oxygen to octane for is 12.5 : 1.
Balanced chemical reaction: C₈H₁₈ + 25/2O₂ → 8CO₂ + 9H₂O or multiply by 2:
2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O.
There same number of atoms on both side of balanced chemical reaction: eight carbon atoms, eighteen hydrogen atoms and twenty five oxygen atoms.

Which group of the periodic table does this element most likely belong to

Answers

The same number of valence electrons. Members of a Group or Family have what in common? The same number of electron shells

The element which have 6 valence electrons belongs to the 16th group in periodic table which is called as the oxygen family.

What is periodic table?

Periodic table is the classification of elements based on their properties into different rows and columns. The horizontal rows in the table is called periods and the vertical columns are called groups.

There are 7 periods and 18 groups in periodic table. From the left to right in a row, the atomic number increases.  A group in periodic table contains elements with same valence electrons and similar physical and chemical properties.

The group number is equal to the number of valence electrons for first and second group. From 3 valence electrons, the group number is  10 added to the number of valence electrons.

Therefore, the group in which an element with 6 valence electrons is placed is 16th group.

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Your question is incomplete, but your complete question probably was:

An element has six valence electrons available for bonding. Which group of the periodic table does this element most likely belong to?

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