identify the equation that relates the heat gained or lost by the reaction to the heat gained or lost by the solution and calorimeter.

Answers

Answer 1

The heat gained or lost by the calorimeter, q cal, is determined from the formula, qcal = Ccal×Δt, where Δt is the change in temperature undergone by the mixture.

What is the definition of calorimetry?

Calorimetry is the study or practice of monitoring changes in a body's state variables for the goal of determining the heat transfer associated with those changes, such as those brought on by chemical reactions, physical changes, or phase transitions, within certain bounds.

How do you calculate calorimetry?

q = msp heatt, where q = heat quantity, expressed in joules (J). 1 degree C Mass, expressed in grams, is K. m. t = °C or K of temperature change. The amount of heat needed to increase the temperature of a specified quantity of a substance by one degree is known as the heat capacity, or C, of the substance.

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Related Questions

a 25.0 ml solution of hbr is neutralized with 16.8 ml of 0.105 m sr(oh)₂. what is the concentration of the original hbr solution?

Answers

The concentration of the original hbr solution is 0.147m.

How do you make HBr solution?

Distillation of a solution of sodium bromide or potassium bromide with phosphoric acid or sulfuric acid yields HBr: KBr + H2SO4 KHSO4 + HBr Because it oxidises HBr to bromine, concentrated sulfuric acid is less effective: 2 HBr + H2SO4 + 2 H2O Br2 + SO2 + 2 H2O

2Hbr + sr(oh)₂ --> srbrc + 2h₂0

25ml     16.8 ml

xm         0.105 m

for complete neutralization

Moles of Hbr =2× moles of sr(oh)₂

xm × 25ml = 2 ×  16.8 ml ×  0.105 m

x = 0.147m

Hence 0.147m is a correct answer.

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The ionic compounds NaCl and MgS are represented by the diagrams above. Which statement correctly identifies diagram 1 and identifies the compound with the lower melting point, explaining why?
A
Diagram 1 represents NaCl
NaCl
; it has a lower melting point than MgS
MgS
has because the coulombic attractions between the singly charged Na+
Na
+
ions and the Cl−
Cl

ions in NaCl
NaCl
are stronger than those between the ions in MgS
MgS
.
B
Diagram 1 represents NaCl; it has a lower melting point than MgS because the coulombic attractions between its singly charged Na+
ions and the Cl−
Cl

ions are weaker than those between the ions in MgS
MgS
.
C
Diagram 1 represents MgS
MgS
; it has a lower melting point than NaCl
NaCl
because the coulombic attractions between its doubly charged Mg2+
Mg
2
+
ions and the S2−
S
2

ions are stronger than those between the ions in NaCl
NaCl
.
D
Diagram 1 represents MgS
MgS
; it has a lower melting point than NaCl
NaCl
because the coulombic attractions between the doubly charged Mg2+
Mg
2
+
ions and the S2−
S
2

ions are weaker than those between the ions in NaCl
NaCl
B

Answers

The magnesium sulfide having a weaker coulombic interaction would have a lower melting point. Option D

What is the correct image?

We know that a substance is said to be ionic if the substance is formed by the interaction of two ions. We know that one of the ions must be positive and the other must be negative. The magnitude of the charges would have an impact on the nature of the interaction between the charges.

Since we know that magnesium sulfide has a double negative charge on sulfur and a double positive charge on magnesium while the sodium has a single positive charge and the chloride has a single negative charge, the magnitude of the interaction between the sodium and the chloride ions is higher thus the magnesium chloride compound shown in image 1 would have a lower melting point.

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assume the equivalent weight of an acid is 94.0.94.0. calculate the number of ml of 0.353 m0.353 m naohnaoh that would be needed to titrate 0.223 g0.223 g of the acid.

Answers

The volume required for titration of NaOH is 0.000837ml.

Given -M=94g

m=0.223g

V=0.353

To find the new volume consider following points -

The most frequently used phrase in chemistry and one of the fundamental ideas in the physical chemistry section is "equivalent weight." The definition of an equivalent weight, also referred to as a gram equivalent, is the mass of one equivalent, or the mass of a given substance that will combine with or replace a specific amount of another substance. To put it another way, the mass of a substance that can displace 1 point 008 grams of hydrogen, 8 point 0 grams of oxygen, or 35 point 5 grams of chlorine is known as its gram equivalent or equivalent weight. As a result, the atomic weight of the substance is divided by its valence to determine the equivalent weight. As an illustration, the oxygen's equivalent weight will be 16 g / 2 = 8 g.

Calculations-

[tex]MV=mv\\\\94V=0.223 *0.353\\\\V=\frac{0.223 *0.353}{94} ml\\\\V=0.000837ml[/tex]

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Calculate the cfse for a d^3 system in an octahedral field in units of ∆_o. In other words, do not enter "∆_o" with your answer. For example, if your answer is −0. 8∆_o, then enter "−0. 8. ".

Answers

Magnetic moment (spin only) of octahedral complex having CFSE=−0.8Δo and surrounded by weak field ligands can be : Q

To answer this, the Crystal Field Stabilization Energy has to be calculated for a (d3 metal in both configurations. The geometry with the greater stabilization will be the preferred geometry. So for tetrahedral d3, the Crystal Field Stabilization Energy is: CFSE = -0.8 x 4/9 Δo = -0.355 Δo.

[Co(CN)64-] is also an octahedral d7 complex but it contains CN-, a strong field ligand. Its orbital occupancy is (t2g)6(eg)1 and it therefore has one unpaired electron. In this case the CFSE is −(6)(25)ΔO+(1)(35)ΔO+P=−95ΔO+P.

The crystal field stabilization energy (CFSE) (in kJ/mol) for complex, [Ti(H2O)6]3+. According to CFT, the first absorption maximum is obtained at 20,3000cm−1 for the transition.

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The charge of a sulfur (S) ion is
The charge of a potassium (K) ion is
The charge of a boron (B) ion is
The charge of an iodine (I) ion is
The charge of a bromine (Br) ion is

Answers

Answer: you have to add the atomic number and the protrons

Explanation:

sulphur2-

K1+
B2+
I1-

Br1-

Explanation:

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Write the configuration of a magnesium atom? Will the atom lose or gain electrons? Explain using the idea of stability and energy.

Answers

Answer:

[tex]1s^{2} 2s^{2} 2p^{6} 3s^{2}[/tex]

Magnesium will lose 2 electrons.

Explanation:

Looking at a periodic table, magnesium is in the third period and the second group. It would help to look up where atomic orbitals are on the periodic table, but basically, s orbitals are filled in the first two groups. Since magnesium is in the second group, it will just have filled a 3s orbital with two electrons.

Elements in groups 1A, 2A, and 3A especially like to lose electrons to gain stability. Elements want to have a filled valence (outer) orbital with 8 electrons (except for hydrogen and helium) like noble gases. As such, they will lose or gain electrons in the easiest way possible to get a filled valence orbital. Magnesium wants to have the electron configuration of the nearest noble gas, in this case neon, so it will lose 2 electrons to achieve this stability. It takes much less energy to lose 2 electrons than gain 6 to fill its valence orbital, so magnesium will go for the former.

The electronic configuration of magnesium is 2,8,2. In this example the atom will lose two electrons forming a positive ion(metal)to become stable

what is the percent yield of hcl if 42.0 g of hcl are produced from the reaction of 62.0 g of pcl3? use percent yield equals startfraction actual yield over theoretical yield endfraction times 100.. 28.4% 72.8% 85.0% 93.5%

Answers

The percent yield of HCl is 85.0%.

In chemistry, yield, also referred to as reaction yield, is a measure of the quantity of moles of a product formed in relation to the reactant consumed, obtained in a chemical reaction, usually expressed as a percentage.

%yield = (actual yield/theoretical yield) x 100

The presence of impurities lowers the actual yield, which lowers the percentage yield. The purity of the reactants influences the percentage yield. Highly pure reactants tend to increase actual yield and, as a result, percentage yield.

A percentage yield greater than 100 percent is only possible if the product is contaminated with impurities or if all of the solvent from the reaction mixture has not been dried off.

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what is the volume occupied by 15.2 g of argon gas at a pressure of 1.04 atm and a temperature of 353 k ?

Answers

The volume of argon will be 10.57 L.

Apply the ideal gas law, PV = nRT, where n is the number of moles and R is the gas constant.

We must divide the given mass of argon by its molar mass because we have mass and need moles. Argon has a molar mass of 40 g/mol.

So the number of moles of Argon in 15.2g is = [tex]\frac{15.2}{40} = 0.38[/tex]mol

Given:

P = 1.04 atm

n = 0.38 mol

R = [tex]0.082057 Latm K^{-1} mol^{-1}[/tex]

T = 353 K

Unknown:

V

Solution:

V = [tex]\frac{nRT}{P}[/tex]

V = [tex]\frac{0.38*0.082*353}{1.04} = 10.57[/tex] L

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a sample of vitamin a, c20h30o, contains 4.0 x 1024 atoms of carbon. how many moles of vitamin a does it represent?

Answers

A sample of vitamin a, C20H30O, contains 4.0 x 1024 atoms of carbon. It represents 6.64 mol of vitamin.

A mole is defined as the quantity of a material that contains precisely the Avogadro number of the substance's "elementary entities."  

Every material has the same amount of atoms or other particles in a mole. The mole has the following relationship to an element's mass: One mole of carbon-12 atoms weighs 12 grams and has 6.02214076 x 10^23 atoms.The mole concept helps in putting quantitative data about what transpires in a chemical equation on a macroscopic scale.

Number of carbon atoms in the given sample = 4 x 10^24 atoms.

We know that 6.022 x 10^23 carbon atoms = 1 mole (avagardo constant)

So, moles in 4 x 10^24 carbon atoms will be = 4 x 10^24/ 6.022 x 10^23

      =  6.64 mol.

Therefore, no of moles present is 6.64 mol.

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how many grams of aluminum can form by passing 353 c through an electrolytic cell containing a molten aluminum salt?

Answers

0.0329 grams of aluminum can form by passing 353 c through an electrolytic cell containing a molten aluminum salt

AL^3+ + 3A^-   = AL

3 moles of e- = 1 mole AL

3 faraday e- =  1 mole AL

3 * 96485  c = 1 mole AL

1 c = (1 / 3*96485)*27 g

353c = 353*27 / 3*96485 g

        = 0.0329 g of AL

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Why does it make sense that acetyl-coa stimulates the activity of pyuruvate carboxylase?.

Answers

Acetyl-CoA indicates conversion of fat to carbs necessary. Acetyl-CoA carboxylase accumulation indicates lack of citrate. NADH is produced for energy when pyruvate carboxylase is activated by acetyl-CoA.

Why is it logical that acetyl-CoA would cause pyruvate carboxylase to be activated?

Acetyl-CoA selectively activates pyruvate carboxylase. When acetyl-CoA concentrations are high, organisms use pyruvate carboxylase to divert pyruvate from the TCA cycle because acetyl-CoA is a crucial metabolite in the TCA cycle that generates a lot of energy.

How does pyruvate carboxylase become activated by acetyl-CoA?

The production of more oxaloacetate is triggered by an excess of mitochondrial acetyl-CoA. When lipolysis is induced, for instance, intramitochondrial acetyl-CoA levels rise, allosterically activating pyruvate carboxylase to produce more oxaloacetate for gluconeogenesis.

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The answer is part C is the energy required to break six carbon-carbon bonds the average bond enthalpy of one carbon-carbon bond in benzene. Calculate in gaseous benzene, CoHs (g): Express your answer to four significant figures and include the appropriate units. View Available Hint(s) AH = Value Units Submit

Answers

348 kilojoules is the energy required to break single carbon-carbon bonds. hence for six carbon-carbon bond 348*6=2088 kilojoules.2088 kilojoules  is the bond enthalpy of six carbon-carbon bonds.

What is bond enthalpy?

Bond dissociation energy refers to the amount of energy required to break one carbon -carbon bond. This Bond dissociation energy is known as Bond enthalpy.

Bond enthalpy of one carbon-carbon bond in benzene:

518 kJ/mol is the Bond enthalpy of one carbon-carbon bond in benzene which means  518 kJ/mol energy is required to break one single c-c bond in benzene.

hence,  348 kilojoules is the energy required to break single carbon-carbon bonds. hence for six carbon-carbon bond 348*6=2088 kilojoules.2088 kilojoules  is the bond enthalpy of six carbon-carbon bonds.

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which of the following compounds would be considered an electrolyte? a. c6h12o6 b. naoh c. co2 d. agcl

Answers

Answer: B: NaOH

Explanation:

which of the following has more valence electrons than it does core electrons? a.) calcium b.) neon c.) chlorine d.) aluminum

Answers

Neon has more valence electrons than does core electrons. The core electrons of neon are 2 and valence electrons are 8.

10 electrons make up neon, with 2 in the outermost shell and 8 in the outermost shell (so eight valence electrons)

With a total of 10 electrons, neon is the tenth element. The initial two electrons in the electron configuration for neon will be in the 1s orbital. The following two electrons for Ne enter the 2s orbital since 1s can only hold two electrons. Six additional electrons will enter the 2p orbital. The Ne electron configuration will be 1s22s22p6 as a result.

Because there are eight electrons in the second energy level (2s22p6) Neon has a full outer shell and an octet. Therefore, it is a Nobel Gas.

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Pentane (C5H12) is a component of gasoline that burns according to the following balanced equation:
C5H12(l)+8O2(g)→5CO2(g)+6H2O(g)
Calculate ΔH∘rxn for this reaction using standard enthalpies of formation. (The standard enthalpy of formation of liquid pentane is -146.8 kJ/mol.)

Answers

Enthalpy change of Pentane (C5H12)  that burns is -3,270.5  kJ

Enthalpy change is defined as the difference in enthalpy of total products and reactants, each multiplied by the respective moles. It is expressed as ΔH°rxn

The formula for calculating the enthalpy change of a reaction is:

ΔH°rxn =∑[n x ΔH°f(product) - ∑[n x ΔH°f(reactant)]

The equilibrium reactions are:

C₅H₁₂(l) + 8O₂(g) ⇒ 5CO₂(g) +6H₂O(g)

ΔH°f(CO₂)(g) = -393.5 kJ/mol

ΔH°f(H₂O)(g) = - 241.8 kJ/mol

ΔH°f(C₅H₁₂)(l) = -146.8 kJ/mol

ΔH°f(O₂)(g) = 0 kJ/mol

The equation for the enthalpy change for the above reaction is:

ΔH°rxn =∑[n x ΔH°f(product) - ∑[n x ΔH°f(reactant)]

ΔH°rxn =∑[(n(CO₂) x ΔH°f(CO₂)) + (n(H₂O) x ΔH°f(H₂O)) ]- ∑[(n x ΔH°f(C₅H₁₂)) + (n x ΔH°f(O₂))]

ΔH°rxn =[( 5 x -393.5) + (6 x - 241.8 ) ]- [(1 x -147.8) + (8 x O₂)]

ΔH°rxn = -3,418.3 -(-147.8)

ΔH°rxn = -3,270.5  kJ

Therefore, the enthalpy of burning 1 mole of pentane is -3,270.5  kJ

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In the structure illustrating the bonding in ethene, c2h4, the two arrows point to what type of bond or bonds?.

Answers

The straight arrows in the structure c2h4 that represent binding bonding in ethene point to the -bond.

What do you mean bond?

Bond are fixed-income products that reflect loans from investors to borrowers .  An bond can be compared to the an agreement outlining the terms of the loan and the associated payments between both the lender and borrower.

What is bond in relationship?

A strong sense of friendship, affection, or shared values which brings people together is referred to as a bond. We developed a very unique friendship as a result of the event. The tie that bound them was [+ between]. Synonyms include bind, link, tie, and union. Additional words for bond.

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Partial bonding, for example, as part of a resonance hybrid, often results in structures with _____.

Answers

Partial bonding, for example, as part of a resonance hybrid, often results in structures with fractional bond orders.

What is resonance?

Resonance in chemistry, also known as mesomerism, is a means to describe bonding in specific molecules or polyatomic ions by fusing a number of contributing structures into a resonance hybrid according to valence bond theory.

Resonance structure identification guidelines:

Atoms are immobile. Electrons can only be moved in bonds or lone pairs (that are in p orbitals) The system's total fee must not change. A molecule's bonding structure needs to be preserved.

Therefore, Partial bonding, for example, as part of a resonance hybrid, often results in structures with fractional bond orders.

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What is the chemical name of the compound K₂SO4?

Answers

Answer: Potassium Hydrogen Sulfate

Explanation: The name of the compound K2SO4 is Potassium Hydrogen Sulfate.

showing the behavior of several different gases follow. which of these gases exhibit behavior significantly different from that expected for ideal gases?

Answers

Gases C, E and F exhibit behavior significantly different from that expected for an ideal gas. gases exhibit behavior significantly different from that expected for ideal gas

A theoretical gas called an ideal gas is one that has lots of point particles moving around randomly and not being affected by other particles. The ideal gas concept is advantageous because it complies with the ideal gas law, a condensed equation of state, and is amenable to statistical mechanics analysis. A theoretical gas called an ideal gas is one that has lots of randomly moving particles but doesn't have any interparticle interactions. The opposite is true for a real gas; it takes up space and its molecules interact. As a result, PV is always equal to nRT.

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calculate the final concentration of the solution when water is added to prepare each of the following solutions. part a 25.0 ml of a 22.0 m hcl solution is diluted to 440. ml

Answers

The final concentration of the solution after adding water is HCl is 1.25M.

The solution of 25ml of 22M HCl is diluted to 440ml.

So, as we know,

Moles = molarity x volume

So, he moles of HCl are,

Moles = 22 x 25

Moles of HCl are 550 mole.

Even after diluting, the mole will not change, so,

Final concentration after adding water,

Concentration = 550/440

Concentration = 1.25M.

So, the final concentration of the HCl solution is 1.25M.

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indentify the three decomposition reactions. how did you determine the calssification of these chemicals reactions

Answers

Thermolysis, photolysis, and electrolysis are three different forms of breakdown reactions. A single source was cooked to yield two or more objects in each instance (decomposition).

Which reaction is decomposition?

Decomposition reactions happen when complex chemical entities split apart into smaller components. Decomposition reactions often demand energy input. For instance, the thermal breakdown of potassium hydroxide (KClO3) is a typical technique used during laboratories to generate oxygen gas.

What kind of decomposition best illustrates this?

Below is a typical illustration of a thermal breakdown reaction. Calcite breaks down into calcareous dioxide and atmospheric co2 when heated. The production of quick lime, a crucial component in numerous industries, uses this procedure.

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What do you notice about the temperature while the water is in the process of freezing?.

Answers

Answer:

During freezing, the temperature of a substance remains constant while the particles in the liquid form a crystalline solid.

Explanation:

WHICH OF THE FOLLOWING IS TRUE ABOUT THE MASSES OF THE SUBATOMIC PARTICALS OF AN ATOM?

a
ELECTRONS AND NEUTRONS ARE 1 AMU AND PROTONS ARE 1/2000 AMU.
b
ELECTRONS, PROTONS AND NEUTRONS ARE ALL 1 AMU.
c
PROTONS AND NEUTRONS ARE 1 AMU AND ELECTRONS ARE 1/2000 AMU.
d
ELECTRONS AND PROTONS ARE 1 AMU AND NEUTRONS ARE 1/2000 AMU.

Answers

Answer:

C.

Explanation:

Both protons and neutrons are 1 amu while electrons are 1/2000 amu

which of the following is not true? group of answer choices the bronsted-lowry model applies to a wider range of acid-base phenomena than does the arrhenius model. the arrhenius model of acids and bases applies toward substances that are nonaqueous. the arrhenius model of acids and bases was developed before the bronsted-lowry model. the bronsted-lowry model can apply to bases that do not contain hydroxide ions. none of the above

Answers

Arrhenius Model of acids and bases is applicable to nonaqueous substances.

Which of the following statements is FALSE?

A) Nonaqueous substances are subject to the Arrhenius Model of acids and bases.

B) The Bronsted-Lowry Model was created before the Arrhenius Model of acids and bases.

C) Bases without hydroxide ions can still use the Bronsted-Lowry Model.

D) Compared to the Arrhenius Model, the Bronsted-Lowry Model covers a greater spectrum of acid-base phenomena.

option A is correct

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Select the single best answer: Which of the following additions will result in decrease in the pH of the solution? Adding ammonium nitrate to an ammonia solution. Adding potassium chloride to hydrochloric acid solution: Adding sodium formate to formic acid solution

Answers

Adding ammonium nitrate to an ammonia solution will result in a decrease in the pH of the solution.

Ammonia is a basic compound. In aqueous solution, the lone pair on the nitrogen atom is able to capture a proton, forming the ammonium ion. Ammonium is the conjugate acid of ammonia, and is slightly acidic. Adding ammonium to a solution of ammonia will lower the pH, since the ammonium is acidic.

The HCl and KCl in the system are there to increase the solution's ionic strength, which results in increased pH value.

The sodium formate solution adds sodium ions and formate ions. This disturbs the formic acid equilibrium, driving it towards reactants. This removes some hydronium ion from solution, increasing the pH.

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curved arrows are used to illustrate the flow of electrons. using the provided starting and product structures, draw the curved electron-pushing arrows for the following reaction or mechanistic steps. be sure to account for all bond-breaking and bond-making steps.

Answers

The electron flow arrow always starts from the nucleophilic center to the electrophilic Centre.

What is nucleophilic ?

The term "nucleophile" refers to an atom or molecule that searches for a positive centre during a chemical reaction, such as the nucleus of an atom, since the nucleophile has an accessible electron pair for bonding.

What is electrophilic ?

An atom or molecule that searches for an atom or molecule that has a pair of free electrons during a chemical process. Lewis acids, which absorb electron pairs, are electrophilic chemicals; many of them are also Brnsted acids (compounds that donate protons).

The electron flow arrow always starts from the nucleophilic center to the electrophilic Centre. The arrow starts from the electrons.

Mechanism with arrows:-

Therefore, The electron flow arrow always starts from the nucleophilic center to the electrophilic Centre.

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During glycolysis, sugar (glucose) is converted to a more usable form called __________________________.

Answers

Answer:

-ATP -carbon -glycolysis -Electron -Transport -FADH -phosphates -dioxide -pyruvate -ADP -NADH -Synthase -Water -cytoplasm -Chain -mitochondria -Krebs -oxygen

Explanation:

Staci ordered a frozen yogurt cone. The picture shows the frozen yogurt cone after Staci was finished and ran off to play. A partially melt yogurt in a cone. Which statement correctly describes the particles that make up the yogurt cone shown? A. The particles move slower and vibrate in place in the melted yogurt. B. The particles stop moving when the yogurt is completely melted. C. The particles move faster and slide past each other in the melted yogurt. D. The particles in the yogurt move only if the temperature changes suddenly.

Answers

According to the forces of attraction, in the frozen yogurt  which is melted the  particles move faster and slide past each other in the melted yogurt.

What are forces of attraction?

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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Consider atoms of oxygen and fluorine. Which atom will be the least likely to lose an electron to form an ion and why?

Answers

Answer: Fluorine

Explanation:

Fluorine is least likely to lose an electron to form an ion as it needs only 1 electron to complete its shell compared to Oxygen which needs 2.

Answer:

flourine

Explanation:

Flourine will be the least likely to lose an electron because its ionization energy is higher than oxygen's. Ionization energy is an atoms ability to lose electrons, and it increases up the periods, and across the groups to the right.

if a wave has a frequency of 7.20 x 10^14 Hz and travels at the speed of light (speed of light = 3.0 x 10^8 m/s), what is the wavelength?

Answers

If a wave has a frequency of 7.20 x 10^14 Hz and travels at the speed of light (speed of light = 3.0 x 10^8 m/s), the wavelength is 0.42 × 10⁻⁶ m.

What do you mean by wavelength ?

The term wavelength of light is defined as the distance between the two successive crests or troughs of the light wave. Wavelength is denoted by the Greek letter lambda (λ).

Given:

frequency  = 7.20 x 10^14 Hz

speed of light = 3.0 x 10^8 m/s

Wavelength = ?

Wavelength = speed of light/ frequency

λ = ν / f

= 3.0 x 10^8 / 7.20 x 10^14

= 0.42 × 10⁻⁶ m

Thus, if a wave has a frequency of 7.20 x 10^14 Hz and travels at the speed of light (speed of light = 3.0 x 10^8 m/s), the wavelength is 0.42 × 10⁻⁶ m.

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Flora tells Carlos, "If you mow my lawn I will pay you $20.00." Carlos mows Flora's lawn and collects the $20.00. This is an example of a bilateral contract. True or false Cognitive psychologists posit that individuals who are depressed adopt a negative schema about the world that affects their attention, memory, and information processing. Which of these most represents a negative bias associated with attention?. Issued by a bank at the request of an importer-States the bank will pay a specified sum of money to a beneficiary, normally the exporter, on presentation of particular, specified documents.-Main advantage is that both parties are likely to trust a reputable bank even if they do not trust each other. PLS ASAP An online bookstore sells hardcover books for a regular price of $17.95 and paperback books for a regular price of $9.95. The paperback booksare on sale for 25% off. The bookstore offers two shipping options: free shipping on orders of $59 or more.shipping charge of $5.95 on orders less than $59Isa had planned to buy 2 hardcover and 3 paperback books.How much more will Isa pay if she buys 2 hardcover and 4 paperback books instead of her original plan? Enter the answer in the box. write a program that reads in the name and salary of an employee. here the salary will denote hourly wage, such as $9.25. then ask how many hours the employee worked last week. be sure to accept fractional hours. compute the pay. any overtime work (over 40 hours per week) is paid at 150 percent of the regular wage. Polygon P is dilated from the origin by a scale factor other than 1 to create polygon P.Determine whether each statement is true or false. Select True or False for each statement.A. Polygon P is similar to polygon P. TrueFalseB. Polygon P is congruent to polygon P. TrueFalseC. The side lengths of polygon P are equal to the corresponding side lengths of polygon P. TrueFalseD. The angle measurements of polygon P are equal to the corresponding angle measurements of polygon P. TrueFalse any salary that is rising slower than the rate of inflation is actually falling, in real terms. this statement refers to a client has an exacerbation of multiple sclerosis. the physician orders dantrolene (dantrium), 25 mg p.o. daily. which assessment finding indicates the medication is effective? British representative Horace Walpole characterized the start of the French and Indian War as The volley fired by a young Virginian in the backwoods of America set the world on fire. What do you think Walpole meant by his comment? Do you think he was right or wrong in his characterization of the war? all of the following led to increases in non-marital sexual activity except: a. availability of contraception to married couples b. roe v. wade c. availability of contraception to non-married couples d. all of the above are led to increases in non-marital sexual activity group of answer choices of nitrogen and phosphorus, which is the most limiting nutrient to primary production early in primary succession, and why? pledges members to the protection of territory, political independence, and security of member nations should a threat occur. moscow pact united communists pact north atlantic treaty organization warsaw pact north american treaty organization which of the following is true about cohabitation? a. women with less education are more likely to cohabitate than women with higher levels of education b. lower income is associated with higher cohabitation rates c. high religiosity is associated with lower cohabitation rates d. all of the above are true management tries to maintain consistent, regular dividend distributions to encourage any dividend cuts in the future and prevent a negative signaling effect. true false the use of two or more sales promotion techniques in combination with one another is called a(n) . Classify each substance as a strong electrolyte, weak electrolyte, or nonelectrolyte:(a) Sodium permanganate (b) Acetic acid (c) Methanol (d) Calcium acetate the firm will make the most profits if it produces the quantity of output at which question 15 options: a) marginal cost equals average cost. b) profit per unit is greatest. c) marginal revenue equals total revenue. d) marginal revenue equals marginal cost a stock market comprises 2100 shares of stock a and 2100 shares of stock b. the share prices for stocks a and b are $25 and $15, respectively. what proportion of the market portfolio is comprised of each stock? johnny is designing a rectangular poster to contain 12 in2 of printing with a 1-in margin at the top and bottom and a 3-in margin at each side. what overall dimensions will minimize the amount of paper used? when systemic blood pressure increases, how does the kidney respond to maintain glomerular filtration rate