The required forces are instantaneous and van der wal dispersion respectively
London dispersion forces also referred to as dispersion forces,
London forces, instantaneous dipole-induced dipole forces, fluctuating induced dipole bonds, or loosely as van der Waals forces are a type of force that typically acts between atoms and molecules that are electrically symmetric, meaning that the electrons are distributed symmetrically with respect to the nucleus.
The van der Waals force is a distance-dependent interaction between atoms or molecules that was named after Dutch scientist Johannes Diderik van der Waals. These attractions are not the product of a chemical electronic link, unlike ionic or covalent connections.
They are more prone to disruption since they are relatively weak. Longer distances between interacting molecules result in a rapid disappearance of the van der Waals force.
To learn more about van der wal forces visit:
https://brainly.com/question/13201335
#SPJ1
how do bonds determine certain properties of compounds?
Chemical bonds determine certain properties of compounds because hardness, higher melting, and boiling points are related to bond formation.
How bonds can determine the properties of compounds?Atoms in a compound can be held together because of chemical bonds. When atoms form bonds, they get stability in the electron arrangement. To achieve stability atoms in a compound can lose, gain or share electrons. The type of bond that forms between two elements indicates the electronegativities of the elements. Large differences in electronegativity can lead to the formation of ionic bonds in a compound, while on the other hand, the smaller differences result in the formation of covalent bonds. Bond force determines the elastic modulus of a material. Similarly, stronger bonds will enable a material to resist higher temperatures before the bonds break and the material melts into a liquid.
So we can conclude that hardness, higher melting, and boiling points of compounds are related to bond formation.
Learn more about bonds here: https://brainly.com/question/819068
#SPJ1
what is the definition of a physical change
A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another.
The dimensions or shape of matter may be changed, but no reaction occurs. Physical changes are usually reversible. Note that whether a process is reversible or not isn't truly a criterion for being a physical change.
Contrast this with a chemical process, during which chemical bonds are broken or formed so that the starting and ending materials are chemically different. Most chemical changes are irreversible. On the opposite hand, melting water into ice (and other phase changes) is often reversed.
Examples of physical changes include: Crumpling a sheet of paper (an exemplar of a reversible physical change)Breaking a pane of glass (the chemical composition of the glass remains the same)
Learn more About Physical Change at:https://brainly.com/question/28900040
Which electron energy level transition corresponds to a hydrogen atom absorbing a visible light photon that has a wavelength of 656 nanometers?.
The electron makes the transition from energy level 2 to energy level 3
What is Transition of electron ?A movement (or jump) of an electron from one energy level to another within an atom or artificial atom is known as an atomic electron transition. In a few nanoseconds or fewer, the electron "jumps" from one quantized energy level to another, giving the effect of being discontinuous.
There are three different types of electronic transition that can be taken into account; electron transitions involving p, s, and n. transitions where charge-transfer electrons are involved electrons in d and f transitionsWhen electrons within a molecule are energised to move from one energy level to a higher energy level, molecular electronic transitions occur. The energy shift brought about by this transition reveals details about the molecular structure and controls a variety of chemical characteristics, including colour.Learn more about Electron Transition here:
https://brainly.com/question/14652881
#SPJ13
for a neutralization reaction, would you expect the magnitude of q to increase, decrease, or stay the same if the concentration of only the acid were doubled? why? group of answer choices increase; if only the concentration of acid were doubled more neutralization reaction would occur because there is more acid than base stay the same; if only the concentration of acid were doubled no additional neutralization reaction would occur decrease; if only the concentration of acid were doubled less neutralization reaction would occur because there is less base than acid
For a neutralization reaction, more heat is evolved and Q is doubled.
When the concentration of the acid alone is twice in a neutralization process, the value of q (heat of neutralization) is increased twofold. A neutralizing reaction happens when an acid and a base are combined.A neutralization reaction is a reaction in which an acid undergoes a reaction with a base to form salt and water. Ionically, a neutralization reaction goes as follows; H^+(aq) + OH^-(aq) ------> H20(l).The heat of neutralization (Q) of the system depends on the concentration of the solutions. Since Q is dependent on concentration, if the concentration of any of the reactants is doubled, more heat is evolved hence Q is doubled.To learn more about neutralization reaction visit:
https://brainly.com/question/23008798
#SPJ1
moths emit chemicals called pheromones to attract a mate. if a moth detects pheromones, how might it figure out which direction they are coming from?
When a male moth detects the pheromones emitted by female moth it uses the wind direction to determine the way .
What is a moth and pheromones and how male moth detect pheromones?Moth is a class of butterfly only with more silky appearance on the wings and body.Pheromones are the kind of chemicals secreted by female moth to attract the male moth for copulation.Male moth detects the presence of pheromones or their molecules by the means of olfactory system.After detecting the presence of pheromones , it orients its path through the wind direction.Attracting the mate is purposely for the mater of copulation.With very small plumes of pheromones spread over body the mate is attracted well.To know more about pheromones visit:
https://brainly.com/question/20673686
#SPJ10
1.68 g h2 is allowed to react with 9.89 g n2 , producing 1.69 g nh3 . part a what is the theoretical yield in grams for this reaction under the given conditions? express your answer to three significant figures and include the appropriate units.
The percent yield of NH3 is 18.06%.
What are balanced equations?The equal number of each kind of atom is present on both sides of a chemical equation in order for it to be balanced. Subscripts are a component of the chemical formulae that indicate how many atoms of the previous element are present in each of the reactants and products.
Balanced equation
3H₂(g) + N₂(g) → 2NH₃
We first need to determine the mass NH₃ produced by each reactant in the masses given. The one that produces the least amount of NH₃ is the limiting reagent. The theoretical yield is the amount of of NH₃ produced by the limiting reagent.
Process:
mass reactant→ mol reactant → mol NH₃ → mass NH₃
Reactant H₂
⇒mass H₂ → mol H₂
1.68gH₂×1mol H/2.106gH=0.797 mol H₂
mol H₂ → mol NH₃
0.797 mol H₂2×mol NH₃/3mol H₂=0.531 mol NH₃
mol NH₂ → mass NH3
0.531 mol NH₃×17.031gm of NH₃/1mol nh3=9.043 g NH₃
⇒mol N₂ → mass N2
9.89gm n29×1 mol N₂/28.04g of N₂=0.352 mol N₂
0.3520 mol N₂×2 mol NH₃ mass /1mol N₂=0.704 mol NH₃
⇒mol NH₂ → mass NH₃
0.704 mol NH₃ ×17.031g NH₃ /1 mol NH₃ = 12gm NH₃
H₂ is the limiting reagent so the theoretical yield of NH₃, is 9.043g.
Actual yield is 1.69
Percentage yield= actual yield/ theoretical yield×100%
=1.699/9.043×100%
=18.6%
To know more about balanced equation visit:
https://brainly.com/question/7181548
#SPJ4
In the formula for water (H₂O), what does the lack of a subscript after the O indicate?
O There is one oxygen atom in the compound.
O There are no oxygen atoms in the compound.
O
There are two oxygen atoms in the compound.
There is one molecule in the compound.
Answer:
There is one oxygen atom in the compound
the classic red wine of bordeaux cannot be made from which grape?
Answer:
Pinot Noir
Explanation:
Cabernet Sauvignon, Merlot, Cabernet Franc, Petit Verdot, Malbec, and on occasion Carménère are the six Bordeaux varietals. The classic red wine of bordeaux cannot be made from pinot noir.
What grape is Bordeaux wine ?Cabernet Sauvignon, Merlot, Cabernet Franc, Petit Verdot, Malbec, and on occasion Carménère are the six Bordeaux varietals. These grapes, which each contribute distinctive qualities to their wines, are combined in various ways to create Bordeaux blends.
A variety of grapes are often used to make red Bordeaux. Cabernet Sauvignon, Cabernet Franc, Merlot, Petit Verdot, Malbec, and Carménère are permitted varietals. The fifth generation Bordeaux wine Château Clerc Milon is one of the few remaining producers of Carménère in today's world.
Cabernet Sauvignon, Merlot, and Cabernet Franc make up the majority of a red Bordeaux mix, with minor amounts of Malbec and Petit Verdo.
Thus, The classic red wine of bordeaux cannot be made from pinot noir.
Learn more about Bordeaux wine follow the link;
https://brainly.com/question/14018645
#SPJ12
Which of the following experimental plans will test the effects of pressure on a reaction with gases and what is the expected result?
A) Keep pressure constant and increase the temperature of the reaction; reaction rate will decrease.
B) Keep temperature constant and increase the pressure of the reaction; reaction rate will increase.
C) Keep pressure constant and decrease the temperature of the reaction; reaction rate will decrease.
D) Keep temperature constant and decrease the pressure of the reaction; reaction rate will increase.
Experimental plans will test the effects of pressure on a reaction with gases and then keep pressure constant and decrease the temperature of the reaction; reaction rate will decrease
When increasing the pressure on reaction involving reacting gases increasing the rate of reaction and when keep pressure constant and also decreases the temperature of the reaction reaction rate is also decreases because pressure is constant and temperature is decreases so because of temperature reaction rate decreases
Know more about reaction
https://brainly.com/question/7693850
#SPJ1
an atom of which element, moving at 240 m/s, would possess a de broglie wavelength of 1.40 x 10‒11 m?
Answer:
At - Sn - Cs - Mn.
Explanation:
This element's atom would have a de Broglie wavelength of 1.40 x 10-11 m if it were travelling at 240 m / s ? 6.626 x 10-34 Js / mass × 240 m/s = 1.40 x 10-11 m. An atom of which element, moving at 240 m/s, At, Sn, Cs, and Mn would possess a de broglie wavelength of 1.40 x 10‒11 m.
What is wavelength ?The difference between two successive crest or two successive trough is called as wavelength. Wavelength is denoted by lambda λ.
A spectrum is the term used to describe the range of wavelengths or frequencies for wave phenomena. The term was originally used to describe the electromagnetic spectrum, but it is now now used to describe the sound spectrum and vibration spectrum.
Thus, An atom of which element, moving at 240 m/s, At, Sn, Cs, and Mn would possess a de broglie wavelength of 1.40 x 10‒11 m.
To learn more about wavelength follow the link below;
https://brainly.com/question/12924624
#SPJ12
which signs are typically posted in areas of active lab work?
The signs which are typically posted in areas of active lab work are safety equipment signs, Chemical storage signs, Signs prohibiting food and drink, and Personal protective equipment (PPE) signs.
Typically, active lab work is an area or lab where different samples of tissues, blood, urine, and other fluids are tested for diagnosis purposes and also for research.
A standard lab establishes some PPE signs and rules which must be followed by all the workers, patients, and staff.
In every laboratory, there are some general rules regarding the use of hazardous materials and equipment and for this purpose, safety signs are placed for precaution. Food and drinks are also prohibited in the lab as they may get contaminated.
These rules are being acquainted with the equipment and operation methods, not working alone in the lab, and wearing gloves and goggles, lab coats, and safety shoes for personal safety.
If you want to learn more about safety equipment click here:
https://brainly.com/question/17267377
#SPJ4
What is the equation for cellular respiration? (1 point) Responses glucose + oxygen + energy → carbon dioxide + water glucose + oxygen + energy → carbon dioxide + water carbon dioxide + water + energy → glucose + oxygen carbon dioxide + water + energy → glucose + oxygen glucose + oxygen → carbon dioxide + water + energy glucose + oxygen → carbon dioxide + water + energy carbon dioxide + energy → glucose + oxygen + water
The equation for cellular respiration is :
Glucose + oxygen ⇒ water + energy + carbon dioxide
HOW CELLULAR RESPIRATION WORKS:
The process through which living things receive the energy (ATP) required for metabolic activity is called cellular respiration.
It entails the breakdown of sugar molecules (with or without oxygen) to release carbon dioxide and produce energy in the form of ATP (CO2).
The reactants of cellular respiration, or the substances that are used for the beginning of the chemical process, are sugar (glucose) and oxygen. The products, or the results of cellular respiration, are water, carbon dioxide, and ATP energy. Thus it is the answer.
To know more about cellular respiration visit the link:
https://brainly.com/question/18702857
#SPJ1
what happpens when nitrogen fills its valence shell?
A. Three electrons are lost, creating N+3
B. Three electrons are gained, creating N-3
C. Three electrons are gained creating N+3
D. Three electrons are lost, creating N-3
acetonitrile (ch3cn)(ch3cn) is a polar organic solvent that dissolves a wide range of solutes, including many salts. the density of a 1.70 mm librlibr solution in acetonitrile is 0.824 g/cm3g/cm3 . part a calculate the concentration of the solution in molality.
This formula is used to determine a solution's molality:
Molality is defined as the product of the mass of the solvent and the number of moles of the solute.
Solute concentration is 1.80 M.
Thus, 1.80 moles of solute are contained in one litre.
Mass of solvent equals mass of solution minus mass of solute.
Solution mass equals volume times density.
1 L is equal to 1000 cm3 of solution.
mass of solution is 1000 minus 0.824.
824 g is the solution's mass.
Number of moles times molar mass equals the solute's mass.
86.84 g/mol is the solute's molar mass.
Solute mass = 1.80 86.84
156.3 g is the solute's mass.
Solvent mass equals 824 minus 156.3.
Solvent mass is 667.7 g, or 0.6677 kg.
Solution's molality is equal to 1.80/0.6677.
The solution's molality is 2.70 mol/kg.
A solution's molality is the number of moles of solute per kilogram or per kilogram of solvent in the solution. As opposed to the definition of molarity, which is based on a certain volume of solution, this is the opposite. Molality is measured in chemistry using the mol/kg unit.
To know more about Motality, click on the link below:
https://brainly.com/question/14900816
#SPJ4
What is the difference between courtship behavior and territorial behavior? (1 point)
Responses
Territorial behavior is the animal of the same kind, but of the opposite sex. Courtship behavior is the production of offspring.
Courtship behavior is the animal of the same kind, but of the opposite sex. Territorial behavior is the production of offspring
Courtship behavior is used to attract a mate, and territorial behavior is used to protect an area in which an animal lives.
Territorial behavior is used to attract a mate, and courtship behavior is used to protect an area in which an animal lives.
Answer:
Explanation:
b.
The difference between courtship behavior and territorial behavior is that courtship behavior is used to attract a mate, and territorial behavior is used to protect an area in which an animal lives (option C).
What is courtship behavior?Courtship behavior or display is a set of display behaviors in which an animal, usually a male, attempts to attract a mate (female). This is done for reproductive reasons.
On the other hand, territorial behavior refers to any of the methods by which an animal, or group of animals, protects its territory from incursions by others of its species.
Courtship is usually done to find a suitable mate while territorial behavior is done to protect or demarcate an area.
Learn more about courtship behavior at: https://brainly.com/question/18193920
#SPJ1
What types of electrons penetrates most toward the nucleus and therefore has the greatest shielding effect?
The electron present in s subshell will show most penetration towards the nucleus
The extent to which an electron can come closer to the nucleus or the extent to which an electron can experience nuclear force is known as penetration. The ability of electron to penetrate into different subshell and shell is known as its penetration power.
The order of penetration is as follow: s>p>d>f.
Shielding effect is also known as screening effect. It is the decrease in the nuclear force experienced by the valence electron due to increase in atomic number. In the other word we can say that penetration is opposite to shielding effect.
The order of the shielding effect on the outer valence electron is as follow: s>p>d>f.
To know more about penetration:
https://brainly.com/question/11603882
#SPJ4
In the first distillation this week, which component of the original solvent mixture makes the larger contribution to the vapor pressure of the mixture?.
In the first distillation this week, Hexane from the original solvent makes a larger contribution to the vapor pressure of the mixture.
In between hexane and toluene, the hexane will have more vapor pressure contribution in the solution. The boiling point of hexane is much lower than toluene. Therefore, it will evaporate easily at low temperatures and start exerting pressure on the solution.
Hence between hexane and toluene, because of more vapor pressure of hexane and lower boiling point, it will easily evaporate and exerts pressure.
Therefore, from the original solvent, hexane makes a larger contribution to the vapor pressure of the mixture.
To learn more about vapor pressure and hexane, visit: https://brainly.com/question/28206662
#SPJ4
23. The cell has a
high
low
concentration of water
compared to the solution. I
70% Water
30% Solute
What mass of Al(s) is required to make 100.0g of Al2O3(s) if the reaction has a percentage yield of
64.7%?
Answer:
81.8 grams of Al is required
bai₂ since the precipitate is ba₃(po₄)₂, write the molecular equation for the precipitation reaction. if no reaction occurs, write nr after the reaction arrow. be sure to include the proper phases for all species within the reaction.
The equation of the precipitation reaction is given below:
BaI₂ (aq) + Na₃PO₄ (aq) ---> Ba₃(PO₄)₂ (s) + 3 NaI (aq)What are precipitation reactions?Precipitation reactions are reactions in which two solutions are mixed together to give a product that is insoluble in an aqueous medium known as a precipitate.
The precipitate obtained can be removed from the mixture through filtration using filter paper.
Precipitation reactions can either be a single displacement or double displacement reaction.
The equation of the reaction of the formation of the precipitate is Ba₃(PO₄)₂ is given below:
Barium iodide, BaI₂ reacts with sodium tetraoxophosphate (v), Na₃PO₄.
BaI₂ (aq) + Na₃PO₄ (aq) ---> Ba₃(PO₄)₂ (s) + 3 NaI (aq)
Therefore, the formation of a white precipitate shows that barium tetraoxophosphate (v) Ba₃(PO₄)₂ is insoluble in water.
Learn more about precipitation reactions at: https://brainly.com/question/20469884
#SPJ1
How much more milk would a typical adult have to drink to get their RDA for calcium compared with the amount of milk needed to get their RDA for vitamin B-12
From the information given, the amount of milk that an adult would need to drink in order to get their RDA for calcium is 826.45cm³. While the amount of milk they would need to drink to get their RDA for B-12 is 266.67. See the explanation below.
What is RDA?Recommended Dietary Allowances (RDAs) are nutrient consumption levels determined by the Food and Nutrition Board to be adequate to fulfill the known nutritional needs of nearly all healthy people based on scientific evidence.
The calculation that justifies the above is given as follows:
For calcium, the RDA is derived as follows;
(500/605) * 1000
= 826.446280992
[tex]\approx[/tex] 826.45cm³
For Vitamin B-12, the RDA is derived as follows;
(500/4.5) x 2.4
= 266.666666667
[tex]\approx[/tex] 266.67cm³
Learn more about RDA:
https://brainly.com/question/14484523
#SPJ1
Full Question:
See attached image.
A property of acids is that they react with metals. If you placed a cut lemon and a raw egg on two spots on bare metal, which of the following would you observe
A. Only the egg would react.
B. Only the lemon would react.
C. Both the lemon and the egg would react.
D. Niether the lemon nor the egg would react.
Answer:
B
Explanation:
lemon is acidic so that's why it react with metals
Another student performs this lab, following a similar procedure to the one you used. However, the student stops adding ice when their water cools down to only 15°C, instead of adding more ice until the water reaches a temperature close to 0°C. Will this version of the procedure change the final calculated value of AH? Justify your response by indicating what measurements would have change
Because the student stopped adding ice when the water cooled down to 15°C, the final calculated value of AH would be different. This is because the heat of fusion of water is not a constant, but rather it decreases as the temperature decreases. Thus, the heat of fusion would be less at 15°C than it would be at 0°C.
What is temperature?
Temperature is a numerical expression of how hot a substance or radiation is.
There are three different types of temperature scales: those that are defined by the average translational kinetic energy per freely moving microscopic particle, like an atom, molecule, or electron, in a body, like the SI scale; those that rely only on macroscopic properties and thermodynamic principles, like Kelvin's original definition; and those that are not defined by theoretical principles but rather by useful empirical properties of particulate matter.
To learn more about temperature
https://brainly.com/question/25677592
#SPJ9
when a 7.00 g sample of rbbr is dissolved in water in a calorimeter that has a total heat capacity of 2.65 kj⋅k−1, the temperature decreases by 0.350 k. calculate the molar heat of solution of rbbr.
The molar heat of solution is -23.2 kJ/mol.
What is the molar heat?The molar heat is the heat that is evolved when one mole of the rubidium bromide is dissolved in water under standard conditions. We first have to find number of moles of the solution. When we dissolve the solid in solution heat is absorbed or evolved as seen above.
Number of moles = 7.00 g/165 g/mol = 0.04 moles
Given that;
H = cθ
H = heat absorbed or evolved
θ = temperature change
c = heat capacity
H = -(2.65 * 0.350)/0.04
H = -23.2 kJ/mol
Learn more about heat capacity:https://brainly.com/question/28302909
#SPJ1
What is charge of selenium ion ?
Answer:
+2 charge
Explanation:
The Se element has 6 valence electrons and hence, it requires 2 more electrons to attain stability or we can say that to complete its octet. Therefore, the ion of Se has +2 charge on it.
Plses give me braniliest
calculate the mass, in grams, of 2.50 mol of iron(iii) hydroxide.
The mass, in grams, of 2.50 mol of iron(iii) hydroxide is 225g
Mass is the measure of amount of matter in a substance or in a object
Here given data is mass iron(iii) hydroxide in mole = 2.50 mol and we have to find mass in gram = ?
The mass of one mole of Fe(OH)₂ = 89.85g/mol
So multiply by given mole by molar mass
2.50mol Fe(OH)₂ = 89.85g/mol Fe(OH)₂/1 mol Fe(OH)₂ = 225g Fe(OH)₂
mass, in grams, of 2.50 mol of iron(iii) hydroxide is 225g
Know more about iron(iii) hydroxide
https://brainly.com/question/1298394
#SPJ1
5. Predict You are floating motionless on a
rubber raft in the middle of a pool. A friend
forms a wave by slapping the water every
second. Will the wave carry you to the edge
of the pool? Explain your answer.
When the pool's center is occupied by the rubber raft. Think of it as the raft's starting position.
Once it reaches the rubber raft, the raft will start to rise when the friend creates a wave by slapping the water.
The raft will really gain energy from the wave, moving upward.
The raft will return to its original place once the wave passes.
The raft will return to its original place where it was before the wave hits it because it is indicated in the question that it is immobile.
As a result, the wave won't take it to the pool's edge.
Because you are only lightly lifted by the waves or because Lee cannot be pushed to the other side of the pool, the wave won't drive the person on the raft over the edge of the pool.
To know more about waves, click on the link below:
https://brainly.com/question/11350613
#SPJ9
What are ways in which minerals are used for items typically found in a medicine cabinet?
Ways in which minerals are used for items typically found in a medicine cabinet are: Emery boards have either garnet or corundum, Fluoride in toothpaste is derived from fluorite, and “Scouring agents” in toothpaste contain calcite.
Things in your domestic that are made with metallic mineral assets are simple to recognize. They are commonly glossy and see like metal unless they are painted, are difficult unless they are exceptionally lean, and are by and large overwhelming for their size. There are numerous other things in your domestic that are made of non-metallic mineral assets, too called mechanical minerals. The concrete establishment of your domestic is made with sand, rock, and lime from limestone. Chimney bricks are made of clay minerals. Window glass is made of quartz sand, whereas interior dividers are made of sheets of drywall made generally of the mineral gypsum. Gypsum is additionally ground up and utilized as a filler in paint on the dividers, and other minerals are ground up to supply shades that color the paint. All mineral assets are non-renewable, so it’s exceptionally critical that they are preserved. The washroom is made utilizing so numerous mineral assets that it is essentially a mine in disguise.
To know more about minerals refer to the link https://brainly.com/question/1333886?referrer=searchResults.
#SPJ4
Classify the following as a
heterogeneous mixture
(suspension), homogeneous mixture
(solution), or a colloid:
s'mores
A. heterogeneous mixture (suspension)
B. colloid
C. homogeneous mixture (solution)
Answer: Heterogeneous mixture (suspension)
Explanation: There is a pattern of the items making them different which is heterogeneous.
At what temperature would water boil at an atmospheric pressure of 55Kpa
At 78°C is the temperature at which water boil at an atmospheric pressure of 55Kpa.
What is temperature?The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature. Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points or thermometric substances.
The most popular scales include the Celsius scale, sometimes known as centigrade, with the unit symbol °C, the scale of Fahrenheit (°F), or the Kelvin scale (K), with the latter being mostly used for scientific purposes. One of the Worldwide System of Units' (SI) seven base units is the kelvin. At 78°C is the temperature at which water boil at an atmospheric pressure of 55Kpa.
Therefore, at 78°C is the temperature at which water boil at an atmospheric pressure of 55Kpa.
To know more about temperature, here:
https://brainly.com/question/23411503
#SPJ2
