Answer:
ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.
Explanation:
a gas mixture of xe, ne, and ar has a total pressure of 12.20 atm. what is the mole fraction of xe if the partial pressures of ne and ar are 2.10 and 4.50 atm, respectively?
6.6 is the mole fraction of xe if the partial pressures of ne and ar are 2.10 and 4.50 atm, respectively.
Why is partial pressure called?The idea of partial pressure is driven by the fact that each individual gas contributes to the overall pressure in a given proportion, which corresponds to its partial pressure. In order to characterize all the pieces, it is essentially equivalent to taking a % or proportion of the whole.
Briefing:The total pressure is equal to the sum of the individual pressures, according to Dalton's law.
Ptotal = total pressure of gases = 12.20 atm
Pne = partial pressure of ne = 2.10 atm
Par = partial pressure of ar = 4.50 atm
Pxe = partial pressure of xe = ?
putting in the values we get:
12.20 = 2.10 + 4.50 + Pxe
Pxe = 5.6
We employ Dalton's law to determine the solution's vapor pressure, which is:
Ptotal = (Pxe + Xxe)
We are given:
Pxe = partial pressure of xenon = 5.6
Xxe = mole fraction of xenon = ?
Using the values in the aforementioned equation, we get:
12.20 = (5.60 * Xxe)
Xxe = 6.6
The mole fraction of Xe is 6.6 as a result.
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Question 9(Multiple Choice Worth 4 points)
(01.03 MC)
Ô
Object A has a mass of 12 g and a volume of 8 cm³. Object B has a mass of 20 g and a volume of 8 cm³. Which object has a greater density and by how much?
O Object A, by 1 gram per cubic centimeter
O Object A by 8 grams per cubic centimeter
O Object B, by 1 gram per cubic centimeter
O Object B, by 8 grams per cubic centimeter
According to the given statement Object B, by 1 gram per cubic centimeter object has a greater density.
What is density ?The measure of how densely a substance is pressed together is called density. As the weight per unit volume, it meets that definition. The formula for density, denoted by the symbol D, is given as follows: density = m/V, where m denotes the object's mass and V its volume.
Does mass affect density?Mass and volume are intimately linked with density. In reality, it explains the precise nature of the connection between the two. By dividing the mass of an object by its volume, we may get its densities. The mass is said to have a low population density if it has a high volume but a tiny mass.
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1.00 L aqueous solution containe nod 5.80 g of sodium hydroxide, NaOH. What was the pH of the solution at 25°C? (Hint: strong acid and strong base titration, use limiting reactant)
The pH of the solution is 13.16.
What is the pH of the base?We know that the pH has to do with the concertation of the hydrogen ions that we have in the solution. We have to first obtain the concentration of the hydroxide ions and then use that to obtain the pH of the solution accordingly.
Number of moles of NaOH = 5.80 g/40 g/mol = 0.145 moles
Concentration of the solution = 0.145 moles/1 L = 0.145 M
pOH = - log( 0.145 M)
= 0.84
pH = 14 - 0.84
= 13.16
We can get the pH of the solution as 13.16.
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How can you describe carbohydrates
Which of the following elements will NOT form
an ion with a -1 charge?
A)Lithium
B)Fluorine
C)Iodine
D)Chlorine
Answer:
Fluorine does not form an ion with a charge of 1+.
the same physical property that helps drive the reaction to completion can also stall out the reaction before it starts. what do we do in the procedure that helps minimize this concern?
Physical characteristics are those that can be seen without affecting a substance's identity.
Physical characteristics are therefore those that can be seen without affecting a substance's identity.
What is physical property ?Any measurable characteristic whose value describes the condition of a physical system is referred to as a physical property. A system's transitions between fleeting states can be described by changes in its physical attributes. Observables are a term used to describe physical characteristics. These attributes are not modal.
Color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point are examples of the physical characteristics of matter. The hue of the elements does not differ much from one element to the next.
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The higher the frequency of light, the ___ its wavelength and the ___ its energy.
a. longer, lower
b. longer, higher
c. shorter, lower
d. shorter, higher
Answer:
c
Explanation:
2. What substances make up water?
30 years ago, 22.5% of the population—45 out of 200 people—were taller than 1.2 meters. Currently, at least 1.2 meters tall people make up 50.5% of the population. Individuals who are under 1.2 meters tall have dramatically dropped throughout the course of the two years of data. This information lends credence to the claim that directed selection is taking place.
The evidence in the question shows that there is a directional evolution that is taking place as the percentage of the tall individuals is increasing.
What is directional selection?We know that the term natural selection implies that the organisms that are are better able to live and survive in a habitat are the ones that are able to live longer and reproduce and by so doing, they are able to transfer the favorable traits that they posses to their offspring.
Now we can also relate to the fact that the idea of directional selection is takin place when there is a situation in which the trend in the evolution seems to favor only one type of trait over another the other type of trait and this leads to a gradual increase in the abundance of the favored trait in the population.
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A car travels 45 km at a speed of 60 km/h. How long does it take the car
to reach its destination?
Answer:
45 mins
Explanation:
it takes 45 minutes long
hydrochloric acid, hcl, is frequently used for titrations, but making a precise molarity of hcl is very difficult. instead, an approximate solution of hcl is made and then analyzed by titration with sodium hydroxide to determine its precise molarity. the titration reaction is hcl naoh nacl h2o. if 26.18 ml of 0.0995 m naoh is required to titrate 25.00 ml of hcl, what is the molarity of the hcl?
The molarity of the HCl 0.104 M
What is molarity?Molarity of a solute is defined as the ratio of number of moles of solute to the volume of solution (L). Solute molarity is sometimes omitted by enclosing the solute chemical formula in square brackets. For example, the concentration of chloride ions in solution can be written as [Cl⁻]. Molarity allows you to convert between the volume of a solution and the moles (or mass) of a solute.
For the given case,
HCl + NaOH --> NaCl + H2O
Since,
M₁V₁ = M₂V₂
M₁ = concentration of NaOH
V₁ = volume of NaOH
M₂ = concentration of HCl
V₂ = volume of HCl
Substitute the given values in the equation mentioned above:
26.18 × 0.0995 = M₂ × 25.00
2.60491 = 25 M₂
M₂ = 0.104 M
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explain why the water strider is able to land on the surface of the water. use your knowledge of intermolecular forces and draw a particle diagram to justify your explanation
Water striders use the high surface tension of water and long, hydrophobic legs to help them stay above water.
Surface tension:
The tension of the surface film of a liquid is caused by the attraction of the particles in the surface layer by the bulk of the liquid, which tends to minimize surface area.
The force responsible for surface tension is the cohesive force that is present between the molecules of the liquid, the surface tension of water is high this is just because there is a hydrogen bond present between the molecules of water.
As we know that the legs of a water strider are long and slender, allowing the weight of the water strider's body to be distributed over a larger surface area.
Therefore the water strider can land on the surface of the water because of the surface tension of the water.
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why does recovered singal have 3 or 4 volatge level instead of 2 levels as you would excpect for a digtal signal
The digital signal is a signal that encodes data as a series of discrete values; at any one moment, it can only take on a maximum of one of a finite set of values.
A digital signal, in contrast, represents continuous values; it always reflects a real number within a continuous range of values. Information is represented by simple digital signals in discrete analogue level bands. The same information state is represented by all levels in a band of values. The signal in the majority of digital circuits can have two legitimate possible values; this is known as a binary signal or logic signal.
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1. what is the impedance of an ac series circuit that is constructed using a 10.0-ohm resistor and a 12.0-ohm inductive reactance and a 7.0-ohm capacitive reactance?
The impedance of an AC circuit with 10 ohm resistor, 12 ohm inductive reactance and 7 ohm capacitive reactance is 11.2 ohm.
What is impedance?
Impedance is the resistance of a circuit to AC which is caused by the combining effects of ohmic resistance and reactance. It is represented by the symbol Z and its unit is ohm. It is a measure of opposition to electric flow.
The impedance of an AC circuit can be calculated by,
Z = [(R^2) + (XL - XC)^2]^1/2
where R = resistance, XL = inductive reactance, XC = capacitive reactance
Z = [(10^2) + (12 - 7)^2]^1/2 = (100 + 25)^1/2 = 11.2 ohm.
Therefore, the impedance of an AC circuit with 10 Ohm resistor, 12 ohm inductive reactance and 7 ohm capacitive reactance is 11.2 ohm.
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consider a situation in which you analyze a mixture of the starting alcohol and the alkene product of an elimination reaction using tlc. if you used a reverse phase tlc plate, which compound would have the higher retention factor? group of answer choices the alkene
Alcohol would have the higher retention factor .
What is Alcohol ?A molecule that can be found in alcoholic beverages like beer, wine, and liquor. Additionally, it can be discovered in several medications, mouthwashes, home goods, and essential oils. It is produced through the chemical process of fermentation, which makes use of yeast and sugar.
The four different forms of alcohol are rubbing, isopropyl, denatured, and ethyl. Ethyl alcohol, commonly known as ethanol or grain alcohol, is the one that we are most familiar with and adore. It is produced by fermenting sugar and yeast and is a component of beer, wine, and alcoholic beverages.Alcohol found in beverages is known as ethanol. It is created when the carbohydrates in grains, fruits, and vegetables are fermented by yeast. For instance, the sugar in potatoes is used to make vodka and the sugar in grapes to make wine.To know more about Alcohol please click here ; https://brainly.com/question/947751
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30 points A 4-column table with 3 rows. The first column titled compound has entries A, B, C. The second column titled melting point (degrees C) with entries negative 183, 660, 772. The third column titled boiling point (degrees C) has entries negative 164, 2467, 1600. The fourth column titled conducts electricity has entries no, yes, yes.
Which compound is most likely a covalent compound?
The compound that is covalent is the compound A.
Which one is a covalent compound?We know that the forces that holds the molecules of an ionic substance together is so strong that the ionic substances are known to have a high melting and a high boiling point. Thus, it is already clear that the compounds B and C are both ionic because they are highly conducting and they also have a high melting and boiling point.
The compound A has a low melting and boiling point and also does not conduct electricity. This goes to tell us that A is a covalent compound.
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Answer:
compound A
Explanation:
edge 2023
the conversion of carbon dioxide to carbonic acid can be catalyzed by carbonic anhydrase with an activation energy of 85.6 kj mol-1at 25c. by what factor will the rate constant increase if the temperature is raised to 37c?
7.133 is the rate constant increase if the temperature is raised to 37c.
factor=rate(T2)/rate(T1) .
The proportionality constant (k) that links the pace of the reaction to the concentrations of reactants is known as the specific rate constant. For any chemical reaction, the rate law and the particular rate constant must be ascertained through experimentation. Temperature affects the rate constant's value.a chemical reaction in which two or more substances interact and change into new ones, or where one substance transforms into another.
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A typical Heliox mixture contains He at a partial pressure of 0.75 atm and O2 at a partial pressure of 0.35 atm. What is the total pressure of the Heliox mixture?
Considering the Dalton's partial pressure, the the total pressure of the Heliox mixture is 1.1 atm.
Dalton's partial pressureDalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:
[tex]P_{T}[/tex]= P₁ +P₂ + ... + Pₙ
where n is the amount of gases present in the mixture.
This relationship is due to the assumption that there are no attractive forces between the gases.
Total pressure of the Heliox mixtureIn this case, the total pressure of the Heliox mixture is calculated as:
[tex]P_{T} =P_{He} +P_{O_{2} }[/tex]
Being:
[tex]P_{He}[/tex]= 0.75 atm[tex]P_{O_{2} }[/tex]= 0.35 atmthe total pressure of the Heliox mixture is
[tex]P_{T}[/tex]= 0.75 atm + 0.35 atm
[tex]P_{T}[/tex]= 1.1 atm
Finally, the total pressure is 1.1 atm.
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If you were camping in a rainforest for two days, your presence would cause many changes to the
surroundings. Describe two physical and two chemical changes that could occur as a result of your
experience
Here are 3 alkali metals with physical and chemical similarity.
What is alkali metals?
Alkali metals are come from the fact that when these metals or their oxides dissolved in water.a basic solution results.
Three alkali metals -
1- hydrogen(H)
2-lithium(Li)
3-potassium(K)
physical and chemical similarity of hydrogen -
-it is colourless and tasteless in nature.
-it is a combustible gas but not a supporter of combustion.
physical and chemical similarity of lithium -
-it have a melting point of 180.54
-it is the lightest of all metals,with a density approximately half that of water.
physical and chemical similarity of pottasium -
- this metal is soft and white with a silver lustre.
-it imparts a lavender colour to a flame, and it's vapour is green.
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assume that coal can be represented by the chemical formula c135h96o9ns . if 2.00 tons of coal is burned, what mass of nitrogen in the form of nox gases, is produced by this combustion?
If 2.00 tons of coal is burned, then the mass of nitrogen in the form of nox gases, is produced by this combustion is 400134 g of nitrogen.
The chemical reaction equation can be written as
C135H96O9NS + 156O2 ------- 135CO2 + 48H2O + NO + SO2
Mass of 2.0 tons of coal in gram = 1.814 × 10^(6) g
Molar mass of C135H96O9NS can be calculated as = 135(12) + 96(1) + 14 + 32 = 1904 moles of coal
Now, number of moles of coal burned = 1.814 × 10^(6) g / (1906 g/mol) = 952.7 moles of coal
If 1 mole of coal produced 1 mole of NO
Total 952.7 moles of coal produced 952.7 moles of NO
Mass of NO can be calculated as
Mass of NO produced = 952.7 × 30 = 28581 g
1 mole of NO = 30 g of NO
Thus, 14 g of nitrogen is contained in 30 g of NO
Let xg of nitrogen is contained in 28581 g of NO
Then,
x = 14 × 28581 = 400134 g of nitrogen.
If 2.00 tons of coal is burned, then the mass of nitrogen in the form of nox gases, is produced by this combustion is 400134 g of nitrogen.
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play with the simulation to determine: a) which particles affect the stability of the atom? b) which particles do not affect the stability of the atom?
a) Neutrons or protons are the particles that have an impact on the stability of the atom.
b) Electrons are the particles that have no impact on the stability of the atom.
When an element's atoms have excess neutrons or protons, the extra energy produced in the nucleus causes the atom to lose its equilibrium or become unstable.
Whether or not an atom's outermost shell is filled with electrons determines how stable the atom is. The molecule is stable if the outer layer is full. To attain stability, vacant outer shell atoms often form chemical interactions with other atoms.
Radioactivity is the capacity of some unstable atoms to spontaneously release nuclear radiation, often in the form of alpha and beta particles associated with gamma rays. The nucleus of an atom might become unstable if there are too many neutrons or protons present.
By ejecting other particles, such as neutrons and protons, or by emitting radiation in a variety of ways, a radioactive atom will attempt to become stable. Thus, the atom's electrons are the only internal particle that has no impact on the atom's stability.
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One mitigating strategy for ______________ is______________. I learned that people need to do _____________to mitigate the effects of___________
Answer:
One mitigating strategy for planning and zoning is to protect people and the environment from the nuisance impacts of facilities like landfills, sewage treatment plants and factories through land use planning tools. I learned that people need to Reduce greenhouse gas emissions through their food choices to mitigate the effects of using Renewable energy.
a sample of he gas has a volume of 322 ml and a pressure of 0.9 atm. what will be the pressure, in atm, if the sample of helium is compressed to 125 ml?
The pressure, in atm, if the sample of helium is compressed to 125 ml is 2.32 atm
An ideal gas is a theoretical gas composed of many randomly transferring factor particles that aren't difficult to interparticle interactions. the best gasoline idea is beneficial because it obeys the precise gas law, a simplified equation of country, and is amenable to evaluation under statistical mechanics.
Volume is a degree of occupied three-dimensional space. it's far more frequently quantified numerically the usage of SI-derived gadgets or by way of diverse imperial gadgets. The definition of length is interrelated with the extent.
Using the ideal gas equation:-
At constant temperature
Given;
P₁ = 0.9 atm
V₁ = 322 ml = 0.322 L
P₂ = ?
V₂ = 125 ml = 0.125 L
P₁V₁ =P₂V₂
P₂ = P₁V₁ /V₂
= 0.9 × 0.322 /0.125
= 2.32 atm
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what causes the lines in these spectra? why are the colors of the lines different? suggest a reason for the observation that the spectrum of calcium is more complicated than the spectrum of hydrogen.
Transitions of electrons within atoms or ions form spectral lines at different rungs which leads to emission of lines of different colors. Spectrum of calcium is more complicated than the spectrum of hydrogen because calcium atom have more electrons than hydrogen.
What are spectral lines?A spectral line in an otherwise smooth and continuous spectral is a dark or bright line resulting from the emission or absorption of light in a narrow frequency range compared to adjacent frequencies. Spectral lines are frequently used to identify atoms and molecules.
The spectral lines arise from electron transitions within an atom or ion. As electrons move toward or away from the nucleus (or ion) of an atom, they release or absorb energy in the form of light (or other radiation).Electrons fall on the lower rung and emit light with the energy of the rung difference. This allows different atoms to emit different colors of light.Calcium has a more complex spectrum. Because calcium has more electrons than hydrogen, there are more possible electronic states and transitions.To know more about spectral lines visit:
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when aluminum (al) reacts with oxygen (o2) in a synthesis reaction, what is the chemical formula of the product? group of answer choices alo2 none of these options al2o3 al3o2
This is a synthesis reaction we're given that aluminium (Al) can react with oxygen gas (O2 to produce aluminium oxide (Al2O3).The balanced chemical equation for this reaction is 4Al(s)+3O2(g)→2Al2O3(s)
When two separate atoms or molecules interact to create a new compound or molecule, the process is known as a "synthesis reaction." The majority of the time, energy is released and an exothermic reaction takes place during a synthesis reaction. An endothermic result is also conceivable, though. When sodium (Na) and chlorine (Cl) are combined, sodium chloride is created. This is an illustration of a synthesis reaction (NaCl). Al2O3 is the chemical formula for the compound of aluminium and oxygen known as aluminium oxide. It is precisely referred to as aluminum(III) oxide and is the most prevalent of various aluminum oxides. Aluminum oxide is utilized for its strength and hardness.
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Write about a time when you experienced or witnessed a microaggression. Connect how you felt to how an element may feel when their electrons are taken away. How do microaggressions relate to ionization energy? How could we use this to explain ionization energy to someone who is not familiar with chemistry?
A time when you experienced microaggression was when i wnet to college in another state. The lecturer in one of my course was very angry that i left my tribe, my state to another state to study. There was element of mockery in his voice.
I felt sad, angry and also bad at the same time. I just wanted to run away from the class because all eyes were on me.
Microaggressions relate to ionization energy through the power they command or hold. I can explain Microaggressions as ionization energy to someone as having the power to aggressively give out a part of you that can be good or bad.
What is an example to clarify what ionization energy is?Ionization energies gauge an atom's propensity to resist losing electrons. For instance, removing an electron from a neutral fluorine atom to create a positively charged ion requires a significant amount of energy.
Note that Microaggressions are everyday verbal, behavioral, or environmental slights that signal hostility, denigration, or negative views toward stigmatized or culturally marginalized groups. They can be deliberate or inadvertent. Chester M., a psychiatrist at Harvard University, originated the phrase.
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Write a nuclear equation for plutonium-241 emitting gamma radiation?
⁹⁴Pu₂₄₄-------> ⁹⁵Am₂₄₃ + electron is a nuclear equation for plutonium emitting gamma radiation
What radiation does plutonium 241 emit?Alpha particles plutonium is created in an activator when uranium atoms absorb neutrons. Nearly all plutonium is man-made. Plutonium mainly emits alpha particle is a type of radiation that is easily ceased and has a short range. It also emits neutrons, beta particles, and gamma rays. It also emits neutrons, beta particles, and gamma rays.
It is contemplated toxic, in part, because if it were to be inhaled it could deposit in the lungs and finally cause damage. There are five common isotopes of plutonium because it emits alpha particles, plutonium is most menacing when inhaled.
So we can conclude that Plutonium isotopes emit alpha rays except for plutonium-241 for which the energy of beta electrons is curiously low.
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how would you observe the spectra of elements with higher ionization energies such as hydrogen or helium?
If a hydrogen atom could have any value of energy, then a continuous spectrum would have been observed, similar to blackbody radiation.
What is ionization energy ?
Ionization energy (also called ionization potential) is the amount of energy required to remove an electron from an isolated atom or molecule in chemistry and physics. There is an ionization energy for each successively removed electron. However, the ionization energy associated with the removal of the first (most loosely held) electron is most commonly used.
The ionization energy of a chemical element, expressed in joules or electron volts, is usually measured in a discharge tube in which rapidly moving electrons produced by an electric current collide with gas atoms of the element, releasing one of them. will be electronic.
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A compound of hydrogen, chlorine, and carbon has a simplest formula of CCIH₂. If in one of its molecules there are two carbon atoms, find its molar mass.
Answer:
99 g/mol
Explanation:
2 carbon atoms in one molecule means double all the other atoms
(12*2)+(35.5*2)+(1*4)=99g/mol
22) in the polysaccharide amylose, large numbers of monosaccharides are linked together through . a) alpha 1-4 glycosidic linkages b) beta 1-4 glycosidic linkages c) alpha 1-6 glycosidic linkages d) beta 1-6 glycosidic linkages e) none of the above
In the polysaccharide amylose,a large number of monosaccharides are linked together through alpha 1-4 glycosidic linkages.
Alpha 1-4 linkage is a stored form of sugar in plant. In this carbon atom 1 and 4 of the the two monomers forms a glycosidic bond. Polysaccharides are long chain forms of monosaccharides linked together by glycosidic bonds.A glycosidic bond is a covalent bond that joins a carbohydrate molecule to another group.this bond gives glycogen that is suitable for energy storage.
Amylose is plant starch made from monosaccharide connected through alpha 1-4 linkages.monosaccharides are the simplest form of sugar.from monosaccharides, all carbohydrates are built.
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