Explain in terms of intermolecular forces why water has an unusually high heat of fusion?

The metallic bonds and the ionic bonds do involve charged species while the covalent bonds do not involve charged species.

The term bond has to do with the interactions that holds two atoms together. There are different kinds of bonds that we have in chemistry and these include;

The ionic bond involves the transfer of electrons from one atom to another usually from a metal to a non metal. This results in the formation of ions. In the metallic bond, there is a sea of electrons that lies over metallic ions. In the case of the metallic bonds and the ionic bonds, there are charged species that are present in the system.

For the covalent bonds, there is a sharing of electrons in the bond and then many of the compounds that have the covalent bonds are fond to be nonpolar.

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Answer:

Yes you always only see one side of the moon

The moon flag always points towards earth

It take 1 month for the moon to orbit the earth

It takes 29.5 days for the flag to rotate once in a full circle

Explanation:

1. cryolite

2. cell

3. bauxite

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9. replaced

this is all I know. I'm sorry I could not answer all

Answer:   12.55 C

Explanation:

The relationship between gas volume and temperature is described by the Ideal Gas Law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature in Kelvin.

P1V1 = nRT1 (initial conditions)

P2V2 = nRT2 (final conditions)

Since the number of moles is constant, we can set nRT1 equal to nRT2:

P1V1 = P2V2

We can rearrange this equation to solve for the final temperature:

T2 = (P1V1/T1) * V2/P2

Substituting the given values:

T2 = (1 atm * 0.675 L / 308.15 K) * (0.635 L / 1 atm)

where we converted the initial temperature of 35 C to Kelvin by adding 273.15 K.

Simplifying and solving for T2:

T2 = 285.7 K - 273.15 K

T2 = 12.55 C

Therefore, the temperature of the room where the gas has a volume of 0.635 L at 1 atm is approximately 12.55 C.

Answer:

What is your body made of? Your first answer may be that it is made up of different organs like the heart, lungs, and stomach, which work together to keep it going. Or you could go even closer and say that it is made of many types of cells. However, at the most basic level, your body — and indeed, all life, like everything that is not alive — is made up of atoms, often organized into larger structures called molecules

Explanation:

Answer:

Extract DNA from the fertilizer to identify its origin.

Explanation:

Barnes find out that fertilizer was used in the explosive material. Barnes should now identify the origin of this type of fertilizer so that its root can be determined. When the origin is unable to be determined then Barnes should keep the traces of the fertilizer and try to identify the manufacturer.

Answer:

Track down where the fertilizer was sold and who bought it

Explanation:

I, myself, took this exam.

Answer:

32.958 g/mol

2.52 moles

Explanation:

Finding the molar mass:

Use the periodic table to determine the masses of each element

6.94+12.011+14.007=32.958 g/mol

Moles:

83 g*1 mol/32.958 g = 2.5183566964 moles

\(\\ \sf\longmapsto LiCN\)

\(\\ \sf\longmapsto 7u+12u+14u\)

\(\\ \sf\longmapsto 21u+12u\)

\(\\ \sf\longmapsto 33u\)

\(\\ \sf\longmapsto 33g/mol\)

\(\\ \sf\longmapsto \dfrac{83}{33}\)

\(\\ \sf\longmapsto 2.5mol\)

Nonmetals tend to form anions by gaining electrons to form a noble gas configuration.

Non-metals typically have a high charge/size ratio.

Consequently, electrons are drawn to them.

Since they have two options for achieving noble gas configuration, they often aim to fulfill their octate.

First, free electrons. Secondly, it acquires electrons since it is simple to remove one or two electrons from non-metals due to their high charge/size ratio. However, getting rid of them all would be like pushing a mountain. You require superhuman power, or a lot of energy, for this. The same is true for non-metals; to remove every electron, you would need an enormous amount of energy that is not conceivable thermodynamically. If they acquire an electron, they can readily achieve the configuration of a noble gas because they naturally attract electrons.

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The predicted rate laws are:

A. rate = k[NO]

B. rate = k[Br2]

C. rate = k[NO]^n (n is a non-integer)

D. rate = k/[NO]

To predict the rate law for the reaction NO(g) + Br2(g) → NOBr2(g) under the given conditions, we can analyze the effects of changing the concentrations of reactants on the rate.

A. The rate doubles when [NO] is doubled and [Br2] remains constant:

This suggests that the reaction rate is directly proportional to the concentration of NO, and the rate law can be written as rate = k[NO].

B. The rate doubles when [Br2] is doubled and [NO] remains constant:

This indicates that the reaction rate is directly proportional to the concentration of Br2, and the rate law can be written as rate = k[Br2].

C. The rate increases by 1.56 times when [NO] is increased 1.25 times and [Br2] remains constant:

In this case, the rate is affected by the concentration of NO, but not directly proportional to it. The rate law can be written as rate = k[NO]^n, where n is a non-integer value.

D. The rate is halved when [NO] is doubled and [Br2] remains constant:

This suggests that the rate is inversely proportional to the concentration of NO, and the rate law can be written as rate = k/[NO].

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The weight of each stopper can vary based on the material, size, and manufacturing process used, so it is not possible to determine the number of rubber stoppers needed without more information.

Weight is a measure of the force of gravity on an object and is typically measured in units of Newtons (N), pounds (lb), or kilograms (kg).

Average weight, on the other hand, refers to the sum of the weights of a group of objects divided by the number of objects in the group. It provides an estimate of the typical or central value of the weights in the group. The units of average weight are the same as the units used to measure weight.

The number of rubber stoppers needed to contain the same number of stoppers as there are corks in 1.0 kg of corks would depend on the average weight of each type of stopper.

The weight of each stopper can vary based on the material, size, and manufacturing process used, so it is not possible to determine the number of rubber stoppers needed without more information.

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Answer:

Freshly prepared ferrous sulphate is used in brown ring test, because if FeSO4 is stored or it is the old one then it reacts with atmospheric oxygen and gets oxidized to form a corrosive brown-yellow coating of basic ferric sulphate, which is an adduct of ferric oxide and ferric sulphate

HEYA FRIEND

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HERE'S YOUR ANSWER

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It is used in brown ring test because , if Fe2So4 is stored or it is old one then it reacts with atmospheric oxygen and gets oxidized to form a corrosive brown yellow coating of basic ferric sulphate , which is an adduct of ferric oxide and ferric sulphate.

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HOPE IT WILL HELP YOU UP

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KATË

Answer:

Chloroform has a boiling point of 61.15 degrees Celsius and a vapor pressure of 9.5 kPa at 20 degrees Celsius. Glycerol, on the other hand, has a boiling point of 290 degrees Celsius and a vapor pressure of 0.0002 kPa at 20 degrees Celsius. Therefore, chloroform has a much lower boiling point and a much higher vapor pressure than glycerol. This means that chloroform is more volatile and evaporates more easily than glycerol.

Explanation:

Chloroform has a boiling point of 61.15 degrees Celsius and a vapor pressure of 9.5 kPa at 20 degrees Celsius. Glycerol, on the other hand, has a boiling point of 290 degrees Celsius and a vapor pressure of 0.0002 kPa at 20 degrees Celsius. Therefore, chloroform has a much lower boiling point and a much higher vapor pressure than glycerol. This means that chloroform is more volatile and evaporates more easily than glycerol.

The daughter nucleus (nuclide) produced when Sr90 undergoes beta decay by emitting an electron is Yttrium-90 (Y90).

In beta decay, a neutron within the nucleus of the parent nuclide (Sr90) is converted into a proton, and an electron (also known as a beta particle) is emitted. This results in the formation of a new element with an atomic number that is one greater than the original nuclide.

Sr90 has an atomic number of 38, which means it has 38 protons in its nucleus. During beta decay, one of the neutrons in Sr90 undergoes decay and is converted into a proton. This results in the formation of Y90, which has an atomic number of 39. Y90 is the daughter nucleus (nuclide) formed after the beta decay of Sr90.

To summarize:
- The parent nuclide is Sr90 with an atomic number of 38.
- During beta decay, a neutron in Sr90 is converted into a proton.
- An electron (beta particle) is emitted during the decay process.
- The daughter nucleus formed is Y90 with an atomic number of 39.

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The substance that has the greatest dispersion forces is E) I2, i.e., molecular iodine.

Molecular iodine is absolutely non-polar. As such, the handiest intermolecular pressure among molecules of iodine is the London dispersion force. The London dispersion force is a brief appealing pressure that consequences while the electrons in adjoining atoms occupy positions that make the atoms shape brief dipoles. This pressure is on occasion referred to as an prompted dipole-prompted dipole attraction. There are 3 varieties of intermolecular forces: London dispersion forces (LDF), dipole- dipole interactions, and hydrogen bonding.

Thus, option E is the correct choice.

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Answer:

A mole is the quantity of a substance that is equal to Avogadro's constant.   The 1.993 moles contain   atoms of sulfur.

Mole :

It is the amount of substance that contains as many elementary entities as in 12 g of Carbon-12. It is equal to the atoms, molecules, or ions.

As mentioned above,

1 mole =

Number of mole formula,

Hence it can conclude that the 1.993 moles contain   atoms of sulfur.

If an atom has an equal number of protons and electrons, its net charge is 0. If it gains an extra electron, it becomes negatively charged and is known as an anion. If it loses an electron, it becomes positively charged and is known as a cation.

I looked it for you, hope that helped <3

To determine the molarity of a CH3COOH solution, we can use the concept of stoichiometry and the volume and molarity information given for the neutralization reaction.

The balanced chemical equation for the reaction between CH3COOH (acetic acid) and NaHCO3 (sodium bicarbonate) is:

CH3COOH + NaHCO3 → CH3COONa + H2O + CO2

From the equation, we can see that the ratio between CH3COOH and NaHCO3 is 1:1. This means that one mole of CH3COOH reacts with one mole of NaHCO3.

First, let's calculate the number of moles of NaHCO3 used in the reaction:

moles of NaHCO3 = volume (in L) × molarity

= 7.12 ml × 0.00114 mol/ml

= 0.0081168 mol

Since the ratio of CH3COOH to NaHCO3 is 1:1, the number of moles of CH3COOH used in the reaction is also 0.0081168 mol.

Next, we can calculate the molarity of the CH3COOH solution:

molarity = moles/volume (in L)

= 0.0081168 mol / 0.00986 L

= 0.824 M

Therefore, the molarity of the CH3COOH solution is 0.824 M.

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Answer:

thermal shock

Explanation:

the temperatures inside the glass jar should have continued to increase over time. Internal stresses due to uneven heating. This is also known as “thermal shock”.

In general, the thicker the glass, the more prone it will be to breaking due to the immediate differences in temperature across the thickness of glass.

Borosilicate glass is more tolerant of this, as it has a higher elasticity than standard silicon glass.

You may also note that laboratory test tubes and flasks are made with thinner walls, and of borosilicate glass, when designated for heating.

Answer:

Good environmental and weather conditions.

Explanation:

The main influence for a horse that will become a racehorse or farm horse are  good environmental and weather conditions. It also needs good food and proper training to made a racehorse. High quality race of a horse always prefer for making a racehorse because it has higher agility, speed, and spirit as compared to horse belongs to ordinary race.

The conditions that are necessary for hail to form is The freezing temperature of the air below the cloud causes the water droplets to freeze.

It should  benoted that the Clouds form  asd a result of the invisible water vapor in the air whichcondenses into visible water droplets whichis been conidered as the ice crystals.

It should benoted that  this can take place  wheen the parcel of air must be saturated, which implies that iot can no longer hold all the water it contains in vapor form,  then it turns to condense into a liquid or solid form.

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Answer:

1.68 atm

Explanation:

First we must obtain the number of moles of the oxygen = 32.7g/32 g/mol = 1.02 moles of oxygen

V= 15.0 L

T= 302 K

R = 0.082 atmLmol-1K-1

From the ideal gas equation;

PV=nRT

P= nRT/V

P= 1.02 *  0.082 * 302/15.0

P= 1.68 atm

I don't know who is our time together in the topic of your name and hygiene and tropical storm is not a problem with the topic of your name and address of the topic of your name and address of the topic of your name and address of the topic of your name and address of the topic of your name and address of the topic

The pH in the four regions is Region 1 (0.301), Region 2 (0.602), Region 3 (7.00), and Region 4 (11.301). To find the pH in the four regions during the titration of 25.0 mL of 0.500 M HCl with 0.500 M NaOH, follow these steps:

Region 1 (0.00 mL NaOH added): Since no NaOH has been added yet, the pH is determined by the initial concentration of HCl. pH = -log[HCl] = -log(0.500) = 0.301.

Region 2 (12.5 mL NaOH added): The moles of HCl remaining are (0.500 M)(25.0 mL - 12.5 mL) / 25.0 mL = 0.250 M. The pH is -log(0.250) = 0.602.

Region 3 (25.0 mL NaOH added): At this point, the HCl has been neutralized by NaOH, so the pH is 7 due to the formation of a neutral salt, NaCl.

Region 4 (25.1 mL NaOH added): Now, there is excess NaOH (0.1 mL * 0.500 M). Moles of excess NaOH = 0.00005 moles. Concentration of OH- = 0.00005 / 25.1 mL = 0.002 M. pOH = -log(0.002) = 2.699. To find pH, use the relationship pH + pOH = 14. pH = 14 - 2.699 = 11.301.

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Answer:$$7.50 x 10^23$$

$$H_2SO_4$$?

Explanation:It is a fact that such a quantity has a mass of  

98.08

⋅

g

. Why? Because  

6.022

×

10

23

particles SPECIFIES a molar quantity. And we know (or can calculate) that sulfuric acid has a molar mass of  

98.08

⋅

g

...  

The given statement "The concentration of fluoride ion will decrease and the concentration of hydrogen fluoride will increase" is true due to a system at equilibrium will shift to counteract any changes applied to it.

According to Le Chatelier's principle, if a change is made to a system at equilibrium, the system will adjust itself to counteract that change and re-establish equilibrium.

1. Consider the equilibrium reaction for hydrogen fluoride (HF) and fluoride ions (F-):

  HF (aq) ⇌ H+ (aq) + F- (aq)

2. If the concentration of fluoride ions (F-) decreases, this change will cause a shift in the equilibrium position to restore balance.

3. According to Le Chatelier's principle, the system will adjust to counteract the change by moving the position of equilibrium to the side where F- ions are produced, which is the side with HF.

4. As a result, the concentration of hydrogen fluoride (HF) will increase to produce more F- ions and re-establish equilibrium.

So, it's true that the concentration of fluoride ions will decrease and the concentration of hydrogen fluoride will increase.

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The mutated amino acid at position 229 is arginine (Arg), and its substitution can potentially disrupt the 3D structure and alter the function of the protein due to changes in side chain properties and interactions.

Structure of the Amino Acids:

The wild-type amino acid at position 229 is not specified, so the structure cannot be provided.

The mutated amino acid is arginine (Arg), which has a side chain containing a positively charged guanidinium group.

Importance of the Position:

The specific position 229 in the protein sequence may be functionally significant, such as being involved in protein-protein interactions, binding sites, catalytic activity, or structural stability.

Without detailed knowledge of the protein, its function, and its structural context, it is difficult to determine the exact importance of this specific position.

Effects of the Mutation on Structure and Function:

The substitution of an amino acid at position 229 from the original to arginine can have various effects on protein structure and function.

Arginine's larger and positively charged side chain may introduce steric clashes or alter electrostatic interactions within the protein structure.

The mutation can potentially disrupt local or global protein folding, stability, or conformational changes, affecting its overall 3D structure.

The functional consequences of the mutation depend on the specific role of the amino acid at position 229, which can include changes in protein-protein interactions, enzymatic activity, substrate binding, or signal transduction pathways.

It is crucial to analyze the protein's structural context, available experimental data, and computational modeling techniques to gain a more accurate understanding of the specific effects of the mutation on the protein's structure and function in the given context.

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The mass of cobalt(II) sulfide (Co₂S₃) that is produced from 0.750 g of cobalt and 0.350 g of sulfur is 0.779 g. Hence, the correct answer is option B) 0.779 g Co₂S₃.

In order to determine the mass of cobalt(II) sulfide (214.07 g/mol) produced from 0.750 of cobalt and 0.350 g of sulfur, we need to determine the limiting reactant in the given chemical equation.

2 Co(s) + 3 S(s) → Co₂S₃(s)

Molar mass of Co = 58.93 g/mol

Molar mass of S = 32.07 g/mol

From the balanced chemical equation, the stoichiometry between Co and S is 2:3. Therefore, the balanced chemical equation can be used to determine the limiting reactant by finding out the mole ratio of Co and S:

(0.750 g Co) / (58.93 g/mol) = 0.0127 mol Co(0.350 g S) / (32.07 g/mol) = 0.0109 mol S

The mole ratio of Co to S is: Co: S = 2 : 3

Since there is not enough sulfur present to react completely with all of the Co present, sulfur is the limiting reactant. The theoretical yield of Co₂S₃ from the balanced chemical equation is:

0.0109 mol S × (1 mol Co₂S₃ / 3 mol S) × (214.07 g/mol Co₂S₃) = 0.779 g Co₂S₃.

Hence, the correct option is B.

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Based on the observations you provided:

a. Between 2-3 minutes, the temperature changed from -1°C to 0°C. This change is due to the process of melting, where the ice changes from a solid to a liquid state.

b. The temperature remains constant between 30-35 minutes because all the water has been converted into steam and the heat supplied is being used as latent heat of vaporization. Latent heat of vaporization is the heat energy required to change a substance from a liquid to a gaseous state at its boiling point without any change in temperature.

True. Do not use oil-based products such as Vaseline and body lotions because they destroy latex. Latex is a natural rubber, and when it comes into contact with oil-based products, it reacts chemically.

This reaction causes latex to degrade and lose its elasticity, making it prone to breakage. Therefore, it is important to avoid oil-based products when using latex products, such as condoms, gloves, and other medical supplies. Instead, use water-based products that are safe to use with latex. Water-based products are gentle on the skin and do not react chemically with latex, making them ideal for use with latex products.

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The concept Charles's law is used here to determine the volume of gas. The new volume of gas at the temperature 132.0°C is . The absolute scale of temperature is also introduced by the scientist Charles's law.

At constant pressure, the volume of a given mass of gas is directly proportional to the temperature on Kelvin scale. This is Charles's law. Mathematically the law can be expressed as V / T = Constant.

For two different gases, the equation is:

V₁ / T₁ = V₂ / T₂

V₂ = V₁T₂ / T₁

132.0°C = 405 K

27.0°C = 300 K

V₂ =  900 × 405 / 300 = 1215 mL

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