The law of partial pressure, also known as ____________ , states that the individual gases in the air contribute to the total atmospheric pressure as a function of the percentage each gas contributes to the total volume.

Due of the weak intermolecular interactions, it has a high melting point.

A force that attracts the protons or positive parts of one molecule to the electrons or negative parts of another molecule is known as an intermolecular force. A substance's various physical and chemical properties are influenced by this force. The strength of an object's intermolecular forces determines its boiling point; the higher the intermolecular forces, the higher the boiling point.

We can compare the intermolecular forces between different substances by comparing their boiling points. This is so that these intermolecular interactions can be broken and the liquid can be transformed into vapour using the heat that the substance absorbs at its boiling point.

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Answer:

1. 4 toothpicks weigh 0.04 grams

2. about 0.60 grams

Explanation:

4 x 0.01 = 0.04 grams

Predicted data are hypothetical info from an outcome, whereas simulated data are modeled by using a particular method.

Simulated data is some kind of information (e.g. biological data) that is modeled by using some method such as computational methods.

Conversely, predicted data are speculative data derived from a given working hypothesis.

In conclusion, predicted data are hypothetical info from an outcome, whereas simulated data are modeled by using some method.

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Atoms involved in a non-polar equally share electrons; there is no charge separation to the molecule.

A nonpolar bond is a type of covalent bond in which the electrons are shared equally between the two atoms forming the bond. This means that the electronegativity of both atoms is similar and there is no separation of charge within the molecule.

As a result, nonpolar bonds are characterized by an absence of polarity or a lack of separation of electric charge.

Examples of nonpolar bonds include bonds between two identical atoms, such as H-H or C-C, as well as bonds between atoms with similar electronegativities, such as N-H or C-O. These bonds are found in molecules that are considered to be nonpolar, such as methane (CH4) and carbon dioxide (CO2).

It is important to note that even though a bond may be nonpolar, the molecule as a whole may still have a polar character if the distribution of electronegativities is uneven across the molecule.

Therefore, Atoms involved in a non-polar equally share electrons; there is no charge separation to the molecule.

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Fe2S3 is The Empirical Formula Of A Compound Containing 53.70% Iron And 46.30% Sulfur.

Fe = 0.961 mol and S = 1.44 mol, Now divide them to get lowest empirical formula. When the subscripts in a chemical formula represent the simplest ratio of the kinds of atoms in the compound, the formula is called an empirical formula.

Most ionic compounds are described with empirical formulas. A molecular formula describes the actual numbers of atoms of each element in a molecule. A compound that contains ions and is held together by ionic bonds is called an ionic compound. The periodic table can help us recognize many of the compounds that are ionic:

When a metal is combined with one or more nonmetals, the compound is usually ionic. This guideline works well for predicting ionic compound formation for most of the compounds typically encountered in an introductory chemistry course. However, it is not always true (for example, aluminum chloride, AlCl3, is not ionic).

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Answer: The correct answer is 188.03K.

Explanation:

As a result, the gas sample will have a volume of 551mL at a temperature of 188.03K.

Explanation:

Cada producto o servicio, independientemente de su propósito, debe ser seguro de usar y desarrollado de acuerdo con los más altos estándares de calidad y seguridad.

Algunos ejemplos de cálculo incorrecto de ingredientes que tendrían graves consecuencias químicas podrían ser:

Medicamentos y vacunas: Este es quizás uno de los ejemplos que tendría las consecuencias más graves para las personas si hubiera un cálculo incorrecto de ingredientes, ya que la producción de medicamentos y vacunas es una industria que requiere la máxima calidad agregada debido a que se ocupa directamente de la salud y los errores de formulación pueden agravar la enfermedad y causar la muerte. Actualmente tenemos el ejemplo de la vacuna para el control de la pandemia, que antes de ser aprobada tuvo que someterse a una serie de investigaciones, pruebas en humanos y diferentes fases para demostrar su efectividad y no causar daño al organismo humano.

Cosméticos: Existen cosméticos de la industria de la belleza que tienen la función de prevenir el envejecimiento cutáneo, alisar el cabello, etc. Por tanto, un cálculo incorrecto de los ingredientes químicos también podría provocar daños irreversibles a la salud, como quemaduras en la piel, caída del cabello, alergias, cáncer, etc.

Alimentos: La industria alimentaria utiliza componentes químicos con el fin de conservar los productos y aumentar la vida útil, por lo que si se usan en cantidades mayores de las necesarias, dichos compuestos pueden causar enfermedades en las personas como intoxicación alimentaria, cáncer, gastritis, etc.

Answer:

Non-polar

Explanation:

Non-polar bonds occur when the electrons in a covalent bond are equally shared between the two atoms.

The indicated bond is most likely non-polar because the two atoms are identical (both carbons). In addition, these two carbons are balanced (their other bonds are identical). This means there is no reason for the electrons in the bond to be pulled in any particular direction.

The number of unpaired electrons in the scandium atom depends on whether it is paramagnetic or diamagnetic. If the atom is paramagnetic, it means that it has at least one unpaired electron in its outermost shell.

This is because paramagnetic materials are attracted to a magnetic field, which is caused by the unpaired electrons. On the other hand, if the atom is diamagnetic, it means that all of its electrons are paired, and it is not attracted to a magnetic field. Therefore, it does not have any unpaired electrons. Since the question does not provide any information about the electron configuration of scandium, we cannot determine whether it is paramagnetic or diamagnetic without further context.
Scandium (Sc) is a chemical element with atomic number 21. In its ground state, the electron configuration of scandium is [Ar] 3d1 4s2. There is only one unpaired electron in the 3d orbital, making the scandium atom paramagnetic. Paramagnetic substances are attracted to external magnetic fields due to the presence of unpaired electrons. On the other hand, diamagnetic substances have no unpaired electrons and are weakly repelled by magnetic fields. Since scandium has one unpaired electron, it is classified as a paramagnetic element.

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Answer:

O, S, Se, Te, Po

Explanation:

Oxygen, sulphur, selenium, tellurium and polonium are all members of group sixteen. The elements in group sixteen all possess six electrons in their outermost shell. Recall that an atom is said to stable if it contains eight electrons in its outermost shell. This is also referred to as the octet rule. Hence atoms of elements obey the octet rule when they combine to form compounds with eight electrons present on the outermost shell of each atom.

Having six electrons on their outermost shell implies that they need to gain two electrons by bonding to other atoms of other elements. Two examples will suffice here.

Water is formed when an oxygen atom shares an electron with each hydrogen atoms.

Hydrogen sulphide is formed when sulphur share two electrons with two hydrogen atoms. Hence the answer.

Answer:

O, S, Se, Te, Po

Explanation:

Hello,

In this case, when chemical bonds are formed, the valence electrons are the bridge to make it possible, nevertheless, the octet is the limit for the formation of bonds, that is, an element must not exceed 8 shared or gained electrons. In such a way, elements able to gain to electrons to attain the octet are those from the VIA group: O, S, Se, Te, Po, as they have six valence electrons, so two more electrons are suitable for attaining the octet.

Best regards.

Answer:

1. 46593.6g

2. 177065.856g

Explanation:

1. 13.6*3426=46593.6g

2. \(\pi r^{2}\) = \(12^{2}\) * 3.14=452.16 \(cm^{2}\) (area of circle)

452.16*44.0=19895.04 \(cm^{3}\) (volume of cylinder)

8.90*19895.04=177065.856g

≈177065.9g

Hope this helps.

The LD50 of sodium cyanide is 6.44 mg/kg for oral ingestion in rats.

This means that if a rat ingests 6.44 mg of sodium cyanide per kilogram of its body weight, there is a 50% chance that it will die. The LD50 is a measure of the lethal dose of a substance and is often used to assess the toxicity of a substance. It is important to note that the LD50 can vary depending on the species and the route of exposure. For example, the LD50 for sodium cyanide may be different for humans than it is for rats, and may also be different for inhalation exposure compared to oral ingestion.

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Answer:

Counting the number of colonies that arise on a pour plate can calculate the concentration by multiplying the count by the volume spread on the pour plate. Direct counting methods are easy to perform and do not require highly specialized equipment, but are often slower than other methods

Explanation:

I hope it will help you

The answer for the percentage yield is 80%.

What is percentage yield?

Recovery is the ratio of actual recovery to theoretical recovery. It is calculated by dividing the experimental yield by the theoretical yield and multiplying by 100%. If the actual and theoretical yields are equal, the yield rate is 100%. Yields are usually less than 100% because actual yields are often lower than theoretical. This may be due to incomplete or competing reactions and sample loss during recovery. Recoveries can exceed 100%. This means that more samples were recovered from the reaction than expected. This can occur when other reactions that form the product occur. Another potential source of error is overage caused by incomplete removal of moisture or other contaminants from the sample. Yield is always positive.

Therefore, The answer for the percentage yield is 80%.

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Answer:

It will explode, I have plenty of research on this. Let me know if you want the sources. :)

Explanation:

Answer:

Explanation:

There will be no reaction when carbon tetrachloride is added to water.  This is because the two substances do not mix.  It is not due to density difference (like the case of Mercury and water) but rather carbon tetrachloride is non-polar while water is polar.  So they will separate and form two different layers with no reaction happening.

The quantity of molecules involved in the reaction is known as the stoichiometric coefficient or stoichiometric number. Any balanced response will have an equal number of components on both sides of the equation, as can be seen by looking at it. Here the mass of MgO is 2.337 g.

By calculating the amounts of reactants and products in chemical equations using stoichiometry is a key idea in chemistry. We employ the ratios from the balanced equation in this situation.

Here the balanced equation is:

2Mg + O₂ ⟶ 2MgO

Moles of Mg = mass  / molar mass

Moles of Mg = 1.41 / 24.31

Moles of Mg = 0.058 mol

Moles of O2 = 2.48 / 32.00

Moles of O2 = 0.0775 mol

the stoichiometric ratio between Mg and MgO is 1:1, and between O2 and MgO is 1:1. Mg is the limiting reactant.

Mass of MgO = moles of MgO produced × molar mass of MgO

Mass of MgO = 0.058 mol × 40.31 g/mol

Mass of MgO = 2.337 g

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The molar mass of a gas based on these experimental results is 224.2 g/mol

The molar mass of a gas can be calculated using the Ideal Gas Law:

PV = nRT

Where,

P = atmospheric pressure (0.946 atm)

V = volume of the gas (250 ml)

n = number of moles of gas

R = ideal gas constant (8.314 J/molK)

T = Temperature (23.5°C = 296.65 K)

We can rearrange the equation to solve for n:

n = PV/RT

n = (0.946 atm * 0.250 L) / (8.314 J/molK * 296.65 K)

n = 0.001934 mol

To calculate the molar mass, divide the mass of the gas (0.433 g) by the number of moles (0.001934 mol):

Molar mass = 0.433 g / 0.001934 mol

Molar mass = 224.2 g/mol

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An unknown mixture is set in beaker on the teacher's table the five different parts of the mixture and we can separate it by method evaporation, distillation, sedimentation, and filtration

Mixture is the composed of one or more pure substances in varying compositions called as mixture and unknown mixture is separated by  shake the separatory funnel to allow intimate mixing of the solutions and effect extraction of the compound from the organic mixture and mixture can be physically separated by sedimentation process, filtration, crystallization, distillation, diffusion, panning, magnetic separation, and adsorption are a few of the methods used to separate materials and the substance is said to be pure when a sample of it has purified all other type of material

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Answer: Correct answer is

Ar- Argon

Explanation:

A P E X :)

In electrolysis the flow of electrons occurs from Anode (Positively Charged electrode) towards Cathode (Negatively charged electrode).

Therefore Diagram A shows the correct flow of electron in an electrolysis

Chemical decomposition produced by passing an electric current through a Electrolytic (Salt) solution containing ions.

Anode is located at the left hand side of the electrolytic cell where as cathode is located at the right hand side of the electrolytic cell.  

Therefore, In the given diagrams, Diagram A follows the above mentioned pattern.

Hence, It shows the correct direction of electron flow in an electrolytic cell.

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Answer:
To calculate the number of atoms of H and C in 0.160 mol of C6H14O, we need to first determine the number of moles of each element present in C6H14O.

The molecular formula of C6H14O shows that there are 6 carbon atoms, 14 hydrogen atoms, and 1 oxygen atom in each molecule of C6H14O.

The molar mass of C6H14O can be calculated as:

Molar mass of C6H14O = (6 × atomic mass of C) + (14 × atomic mass of H) + (1 × atomic mass of O)

= (6 × 12.01 g/mol) + (14 × 1.01 g/mol) + (1 × 16.00 g/mol)

= 86.18 g/mol

Therefore, 0.160 mol of C6H14O has a mass of:

Mass = molar mass × number of moles

= 86.18 g/mol × 0.160 mol

= 13.79 g

Now we can calculate the number of atoms of H and C in 0.160 mol of C6H14O.

Number of atoms of H:

Number of moles of H = 14 × 0.160 mol = 2.24 mol

Number of atoms of H = 2.24 mol × Avogadro's number

= 2.24 mol × 6.022 × 10^23/mol

= 1.35 × 10^24 atoms of H

Therefore, there are 1.35 × 10^24 atoms of hydrogen in 0.160 mol of C6H14O.

Number of atoms of C:

Number of moles of C = 6 × 0.160 mol = 0.96 mol

Number of atoms of C = 0.96 mol × Avogadro's number

= 0.96 mol × 6.022 × 10^23/mol

= 5.78 × 10^23 atoms of C

Therefore, there are 5.78 × 10^23 atoms of carbon in 0.160 mol of C6H14O.

Explanation:

There are 0.00968 moles of iron (Fe 2) in the 1.86 g sample of Fe(NH4)2(SO4)2 · 6H2O.

To determine the moles of iron (Fe 2) in the sample, we need to first calculate the molar mass of the compound Fe(NH4)2(SO4)2 · 6H2O.

The molar mass of Fe(NH4)2(SO4)2 · 6H2O is calculated as follows:
Fe: 55.85 g/mol
N: 14.01 g/mol x 2 = 28.02 g/mol
H: 1.01 g/mol x 12 = 12.12 g/mol
S: 32.07 g/mol x 2 = 64.14 g/mol
O: 16.00 g/mol x 14 = 224.00 g/mol
Total molar mass = 55.85 + 28.02 + 12.12 + 64.14 + 224.00 = 384.13 g/mol

Now we can use the formula for moles to calculate the moles of iron (Fe 2) in the sample:
moles = mass / molar mass
moles = 1.86 g / 384.13 g/mol
moles = 0.00484 mol

Since there are two moles of iron (Fe 2) in the compound, we can multiply the moles of the compound by 2 to get the moles of iron:

moles of iron (Fe 2) = 0.00484 mol x 2 = 0.00968 mol

Therefore, there are 0.00968 moles of iron (Fe 2) in the 1.86 g sample of Fe(NH4)2(SO4)2 · 6H2O.

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Answer:

A Family Portrait

That element is NOT in the family. When we told you about families, we said that they were groups of elements that react in similar ways. Hydrogen is a very special element of the periodic table and doesn't belong to any family. While hydrogen sits in Group I, it is NOT an alkali metal.

Answer:

Explanation:

The chemical properties are so different and cannot be group into a family Hydrogen is the simplest, smallest and lightest of the elements. Unlike the other elements of the periodic table, the combination of properties it exhibits doesn't match any one single grouping or family.

Answer:

A

Explanation:

The answer is A) because the A container has tightly packed molecules but not as tight as C so that means A is liquid, and C is a solid which makes B a gas

Answer:

The answer would be A

Explanation:

because in the first picture Liquid could be in many shapes like If I put water in my water bottle it would be the same shape as the water bottle.

In the third picture, the solid molecules will always be so close to each other like they will be stick to each other.

In the second picture, It will be separate always, as it cant stick to each other.

I hope I helped you!!!!

:)

The forces of attraction existing among the molecules of a substance are called the intermolecular forces. Here the intermolecular force existing between CH₂F₂ and F₂ is dispersion force or London force. The correct option is A.

The dispersion forces are found in the non-polar molecules as well as in monoatomic noble gases like helium, neon, etc. A non polar molecule has a positive centre surrounded by a symmetrical negative electron cloud.

The displacement of the electrons creates an instantaneous dipole temporarily. This dipole distorts the electron distribution of other atoms or molecules which are close to it and induces dipole in them also.

Thus the correct option is A.

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The correct match between solute and solvent and its intermolecular force is given.

The correct match between the solute and solvent and its intermolecular force is:

a) CH2F2 and F2: dispersion

b) CH2F2 and CH2O: hydrogen bonding

c) CH2F2 and PH3: dipole-induced dipole

d) PH3 and NH3: dipole-dipole

e) PH3 and F2: dispersion

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If a certain ore is 35.4% nickel by mass. To have 55.0 g of nickel, we have to dig up 0.155 kg of this ore.

Mass percent of Nickel = (mass of Nickel/mass oft he ore)×100

                                       = 35.4%

This means that in 100 g of ore we have 35.4 g of nickel.

So, 35.4 g of Nickel is present in = 100 g of the ore

1g of Nickel is present in = 100/35.4 g of the ore

55.0 g of Nickel is present in = (100/35.4) × 55.0 g of the ore

                                                 = 155.3 g of the ore

1 g = 1/1000 kg

155.3 g = 155.3/1000 kg

            = 0.155 kg

So, we need to dig 0.155 kg of the ore to get 55.0 g of Nickel.

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The amount of heat absorbed by 23.0 g of water is 3310.2 J.

To calculate the amount of heat absorbed by the water, we can use the formula:

q = m * c * ΔT, where q is the amount of heat absorbed, m is the mass of the water, c is the specific heat of water, and ΔT is the change in temperature.

Substituting the given values, we get:

q = 23.0 g * 4.18 J/(g°C) * (68.0°C - 31.0°C)

q = 23.0 g * 4.18 J/(g°C) * 37.0°C

q = 3310.2 J

Therefore, the amount of heat absorbed by 23.0 g of water when its temperature is raised from 31.0°C to 68.0°C is 3310.2 J.

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Answer:

# of Proton: 48

# of Electron: 48

# ofNeutron: 64

Explanation:

The atomic number of cadmium is 48.

∴  atomic number = protons = electrons = 48.

Neutrons = mass number - atomic number

∴ Neutrons = 112 - 48 = 64.

⇒ number of protons= 48; neutrons= 64; electrons=48