Which of the following is recommended in moving something​ heavy?
A.
Pushing
B.
Reaching
C.
Leaning
D.
Pulling

To calculate the root mean square velocity and kinetic energy of F2, Cl2, and Br2 at 298K, we need to use the kinetic theory of gases.

The root mean square velocity of a gas can be calculated using the formula:

v_rms = √(3kT/m)

where k is the Boltzmann constant, T is the temperature in Kelvin, and m is the molar mass of the gas.

The kinetic energy of a gas can be calculated using the formula:

E_k = (1/2)mv_rms^2

At 298K, the root mean square velocity and kinetic energy of F2, Cl2, and Br2 can be calculated as follows:

F2:

molar mass = 2 * 18.998 g/mol = 37.996 g/mol

v_rms = √(3 * 8.314 J/mol*K * 298K / 37.996 g/mol) = √(0.0244) m/s

E_k = (1/2) * 37.996 g/mol * (0.0244 m/s)^2 = 0.0167 J/mol

Cl2:

molar mass = 2 * 35.453 g/mol = 70.906 g/mol

v_rms = √(3 * 8.314 J/mol*K * 298K / 70.906 g/mol) = √(0.0132) m/s

E_k = (1/2) * 70.906 g/mol * (0.0132 m/s)^2 = 0.0051 J/mol

Br2:

molar mass = 2 * 78.918 g/mol = 157.836 g/mol

v_rms = √(3 * 8.314 J/mol*K * 298K / 157.836 g/mol) = √(0.0064) m/s

E_k = (1/2) * 157.836 g/mol * (0.0064 m/s)^2 = 0.0016 J/mol

To rank the halogens with respect to their rate of effusion, we need to consider the root mean square velocity of each gas. The rate of effusion of a gas is directly proportional to the root mean square velocity of the gas, which is the velocity of the gas particles. Therefore, the gas with the higher root mean square velocity will effuse faster than the gas with the lower root mean square velocity.

From the above calculation, we can see that the root mean square velocity of F2 is the highest, followed by Cl2, and then Br2. Therefore, the halogens can be ranked in terms of their rate of effusion as follows:

F2

Cl2

Br2

So Fluorine(F2) will effuse faster than Chlorine(Cl2) and Bromine(Br2)

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When servers break state, county, or municipal alcohol laws when serving alcohol, the server could be fined and the establishment could lose its liquor license.

This is defined as governmentally issued permit for the service of alcohol in an area over a period of time.

When alcohol law is broken, there may be a fine or the revoking of the liquor license.

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Answer:

A

Explanation:

chemical reaction are those type of reaction that are irreversible and a new substance is being formed therefore when the iron combine with water and air it leads to rusting.

Answer:

No

Explanation:

I think because liquid nitrogen is only made by 1 substance which is nitrogen that exist as a gas.. It only become liquid when the temperature is very cold not because of other combination of elements.. Hope it helps

Answer:

Baseball

Explanation:

The baseball has molecules that are more tightly packed than any other ball on this list here; you could also argue that it is a tennis ball, but the size of a baseball is probably smaller than a tennis ball's

Answer: Baseball

Explanation: has the most mass

The oxygen atoms in water (H2O) are less likely to bind metals than their hydrogen counterparts. This is due to the fact that oxygen has a higher attraction for electrons than hydrogen since it is more electronegative than hydrogen.

Hydrogen bonds form between nearby hydrogen and oxygen atoms of adjacent water molecules in the case of water. A bond called a hydrogen bond is produced by the attraction between individual water molecules.

Because oxygen has a stronger affinity for electrons than other atoms, like hydrogen, the electrons are drawn toward the oxygen atom, which in turn attracts hydrogen atoms.

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If a product is seen on social media It can be determined whether it is making reliable claims by researching and checking credentials.

It is crucial to assess claims made about items that are promoted on social media seriously and not only depend on what is said in the advertisement. Finding information on the product from reliable sources outside of social media is crucial. Looking for ratings, reviews, and comments from trustworthy websites or sources, such as consumer review websites, industry insiders, or reliable news organizations is also an effective step.

Further, one must watch out for ratings or reviews that are unreasonably favorable. Additionally, one needs to assess the authority of the source advertising the goods on social media. Looking for trusted businesses, authoritative websites, and verified accounts is essential along with being aware of accounts or websites with dubious credentials or a lack of openness.

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The impact of e-commerce on commercial real estate is significant. E-commerce sales have grown steadily, accounting for a considerable portion of overall sales.

The growth of e-commerce has fueled the demand for distribution spaces, specifically distribution centers and warehouses, which play a crucial role in the supply chain and logistics of packaging and shipping goods to customers. These spaces are sought after by e-commerce giants, who prefer locations near large cities while still providing ample room for large buildings. Suburban areas, such as Katy, Brookshire, and Waller near Houston, are experiencing significant growth in the establishment of distribution centers.

On the other hand, the rise of online shopping has posed challenges for brick-and-mortar retailers. Many physical retail spaces have struggled to remain open or have had to downsize. As a result, there is a trend towards smaller retail spaces, which require less inventory in-store. This trend encourages a combination of online and in-store shopping, known as hybrid shopping. The Covid-19 pandemic further accelerated this trend as consumers sought the convenience and safety of online shopping with options like curbside or in-store pick-up. Even as restrictions ease, this approach is expected to remain popular.

To adapt to the changing retail landscape, integrating technology into physical retail spaces has become crucial. Technology tools, such as mobile apps, can enhance the shopping experience, offer special promotions, and provide valuable data on customer behavior. Retailers, especially large lifestyle shopping centers, have been proactive in blending technology with consumer experiences to stay relevant and attract customers.

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Independent variable: fertilizer

Dependent variable: bushels of potatoes

3 constants: soil, climate, and time of planting.

Experimental variables can be:

Independent variables are supplied directly by the experimenter and are often manipulated to produce different outcomes.

Dependent variables are the actual variables measured during experiments. Their values are dependent on the independent variable supplied.

Constant variables are all other variables that are neither independent nor dependent but are supplied by the experimenter.

Thus, in this case, the independent variable will be the quantity of fertilizer added to the soil, and the dependent variable will be the bushels of potatoes produced by each experimental group.

The constant variables may include the soil type, climatic conditions, time of planting, etc. All these must be kept constant for the different experimental groups.

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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:

1.10 g/mL

Explanation:

The amount of volume an object displaces is the amount of volume that object takes up.

7.87 - 1.67 = 6.2

The object has a volume of 6.2 mL.

You have the mass (6.82 g) and the volume (6.2 mL).  Divide the two value to find the density.

(6.82 g)/(6.2 mL) = 1.10 g/mL

The density of the object is 1.10 g/mL.

A radioactive substance decreases by 65% each hour. Find the hourly decay factor. The hourly decay factor is 0.35.

Chemicals in the class of radionuclides (also known as radioactive materials) have unstable atomic nuclei. They become stable by undergoing modifications in the nucleus (spontaneous fission, alpha particle emission, neutron conversion to protons, or the opposite).

A radioactive atom will naturally emit radiation in the form of energy or particles in order to transition into a more stable state. The difference between radioactive material and the radiation it emits must be made.

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The H7- ion has one more electron than a neutral hydrogen atom (H), which has an electron configuration of 1s1.

Adding one electron to this configuration results in 1s2, which is the electron configuration of the H- ion. However, the H7- ion has seven extra electrons compared to a neutral hydrogen atom. We can fill these electrons in the following order:

1s2 2s2 2p3

The three electrons in the 2p subshell are in p orbitals. Therefore, the number of electrons in p orbitals in the H7- ion is 3.

To calculate the number of moles of H7- in 10.0 g, we first need to convert the mass to moles using the molar mass of H7-. The molar mass of H7- is: (7 x 1.00794 g/mol) + 1.00794 g/mol = 8.05558 g/mol

Therefore, the number of moles of H7- in 10.0 g is:

10.0 g / 8.05558 g/mol = 1.2412 mol

Finally, we can calculate the total number of electrons in p orbitals in 10.0 g of H7- ion in the ground state:

3 electrons/pair x 1 pair/ion x Avogadro's number x 1.2412 mol = 2.117 x 10^24 electrons

Therefore, there are approximately 2.117 x 10^24 electrons in p orbitals in 10.0 g of H7- ion in the ground state.

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Option B. It provides a single reference for all information about hazardous chemicals.

MSDS does not provide a single reference for all information about hazardous chemicals, but it does provide information on physical and chemical properties, potential hazards, and safe work practices.

The Material Safety Data Sheet (MSDS) is a document prepared by the manufacturer or supplier of a hazardous chemical which provides information about the physical and chemical properties of the hazardous chemical, potential hazards associated with it, and how to work safely with it. The MSDS is an important element of an effective chemical hazard communication system as it provides information on how to identify and protect against potential health hazards, proper storage and handling procedures, and proper disposal methods.

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a pure substance with one type of atom is called a(n) _____ A. molecule OR B. Element

Answer:-Element

An element is a pure substance and is made of only one type of atom; it cannot be broken down into a simpler substance.

\( \: \)

Answer:

a pure substance with one type of atom is called an element

Answer: A. They were traveling through different types of rocks

Explanation:

Considering the definition of empirical formula, the empirical formula is Ag₁N₁O₃= AgNO₃.

The empirical formula is the simplest expression to represent a chemical compound, which indicates the elements that are present and the minimum proportion in whole numbers that exist between its atoms, that is, the subscripts of chemical formulas are reduced to the most integers. small as possible.

Assuming a 100 grams sample, the percentages match the grams in the sample. So you have 63.5 grams of silver, 8.2 grams of nitrogen and 28.3 grams of oxygen.

Then it is possible to calculate the number of moles of each atom in the molecule, taking into account the corresponding molar mass:

Silver: \(\frac{63.5 g}{107.87 \frac{g}{mole} } =\)0.588 moles

Nitrogen: \(\frac{8.2 g}{14 \frac{g}{mole} } =\) 0.586 moles

Oxygen: \(\frac{28.3 g}{16 \frac{g}{mole} } =\)1.77 moles

The empirical formula must be expressed using whole number relationships, for this the numbers of moles are divided by the smallest result of those obtained. In this case:

Silver: \(\frac{0.588 moles}{0.586 moles}\)≅ 1

Nitrogen: \(\frac{0.586 moles}{0.586 moles}\)= 1

Oxygen: \(\frac{1.77 moles}{0.586 moles}\)≅ 3

Therefore the Ag: N: O mole ratio is 1: 1: 3

Finally, the empirical formula is Ag₁N₁O₃= AgNO₃.

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The rate law for the given reaction is k[A][B]^3.

Given reaction is 2A + 3B → Products which is first order in A and third order overall.

To find the rate law we need to use the equation for the third-order reaction which is given as :

k[A]^m[B]^n

where, k is the rate constant

m is the order of the reaction with respect to A (i.e., first order in A)

n is the order of the reaction with respect to B (i.e., third order in B)

By substituting the given values , k[A]^1[B]^3

The order of the reaction with respect to A is 1, so we include [A] to the power of 1, which we can write as [A]^1 or simply as [A]. The order of the reaction with respect to B is 3, so we include [B] to the power of 3, which we can write as [B]^3.

The overall rate law is : k[A][B]^3

Thus, the rate law for the given reaction is k[A][B]^3.

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Answer:

it is a result of hydrogen bonds present within water molecules.

Explanation:

when the water is transformed to ice at zero degrees Celsius, the water molecules are in crystal lattice in a structure that has a lot of empty space around each molecule.

Answer:

1

Explanation:

Octet meaning 8. So if chlorine already has 7 valence electrons it will only need to get 1 more to be satisfied.

The ornamental casting contains approximately 9.5 × 10^23 atoms of silver and 19 × 10^23 atoms of gold.

To determine the composition of the ornamental casting after the loss of atoms during the casting process, we need to calculate the remaining number of atoms for each element.Given:

Number of silver atoms = 10 × 10^23 atoms

Number of gold atoms = 20 × 10^23 atoms

Percentage of atoms lost = 5.0%

First, we calculate the number of lost atoms for each element:

Number of lost silver atoms = 5.0% of 10 × 10^23 = (5.0/100) * 10 × 10^23 = 0.5 × 10^23 atoms

Number of lost gold atoms = 5.0% of 20 × 10^23 = (5.0/100) * 20 × 10^23 = 1.0 × 10^23 atoms

Next, we subtract the lost atoms from the original number of atoms to determine the remaining atoms for each element:

Remaining number of silver atoms = 10 × 10^23 - 0.5 × 10^23 = 9.5 × 10^23 atoms

Remaining number of gold atoms = 20 × 10^23 - 1.0 × 10^23 = 19 × 10^23 atoms

Therefore, the ornamental casting contains approximately 9.5 × 10^23 atoms of silver and 19 × 10^23 atoms of gold.

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The difference in absorption between ti(h2o)6 3 and tif6 3 is due to the different electronic configurations and molecular geometries of the two complexes.                                                                                                                                        

The absorption of light by a complex is related to the energy required to promote an electron from a ground state orbital to an excited state orbital.In ti(h2o)6 3, the titanium atom is surrounded by water ligands which create a high spin d2 configuration. In tif6 3, the titanium atom is surrounded by fluoride ligands which create a low spin d1 configuration.
This phenomenon occurs because the energy required for electronic transitions in TiF6 3- is lower than in Ti(H2O)6 3+, resulting in the observed difference in light absorption.

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Answer:

47.9L of oxygen would be required

Explanation:

Assuming oxygen gas is at STP

Based on the reaction:

S₈ + 12 O₂ → 8SO₃

1 mole of S₈ (Molar mass: 256.52g/mol) reacts with 12 moles of oxygen.

To solve this question we must find the moles of S₈ added. With the reaction we can find the moles of O₂ and using PV = nRT we can find the volume of oxygen required:

Moles S₈:

45.7g * (1mol / 256.52g) = 0.178 moles S₈

Moles O₂:

0.178 moles S₈ * (12 moles O₂ / 1mol S₈) = 2.138 moles O₂

Volume O₂:

PV = nRT

V = nRT / P

Where V is volume

n are moles = 2.138 moles

R is gas constant 0.082atmL/molK

T is absolute temperature = 273.15K at sTP

P is pressure = 1 atm at STP

V = 2.138mol*0.082atmL/molK*273.15K / 1atm

V = 47.9L of oxygen would be required

Answer:

180.2 L

Explanation:

At STP, one mole (6.02 × \(10^{23}\) representative particles) of any gas occupies a volume of 22.4 L . A mole of any gas occupies 22.4 L at standard temperature and pressure (0°C and 1 atm).

Answer:Carbon containg molecules

Explanation:

Protoplasm is made up of necleus and carbon containing molecules

Answer:

Protoplasm is composed of a mixture of small molecules such as ions, amino acids, monosaccharides and water, and macromolecules such as nucleic acids, proteins, lipids and polysaccharides. In eukaryotes the protoplasm surrounding the cell nucleus is known as the cytoplasm and that inside the nucleus as the neoplasm.

Explanation:

45,849 calories are given off when 85 gram of steam condenses to liquid water.

Vaporization is always a highly endothermic (heat-absorbing) process because you must break all the intermolecular interactions present inside of the liquid phase.

So,

Q = mass × heat of vapourization

Q = m×ΔH\(_{vap}\)

Q = 85 × 539.4

Q = 45,849 cal

Therefore, 45,849 calories are given off when 85 gram of steam condenses to liquid water.

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a. The isentropic expansion of the gas, the gas particles have 9 degrees of freedom

b. The structure of the particles show that it is a polyatomic gas.

Isentropic expansion of a gas is an expansion in which no heat is added to the gas.

The degree of freedom of a molecule is the number of independent ways a molecule can store energy?

Since a ideal gas that initially has a volume of 1.00 ml and is at 1.00 atm expands isentropically to 10.0 ml and 0.0215 atm.

To find the number of degrees of freedom of the gas, we use the equation for isentropic expansion.

The equation for isentropic expansion is given by P₁V₁ˣ = P₂V₂ˣ where

Making x subject of the formula, we have

P₁/P₂ = (V₂/V₁)ˣ

x = ㏑(P₁/P₂)/(V₂/V₁)

Substituting the values of the variables into the equation, we have

x = ㏑(P₁/P₂)/(V₂/V₁)

x = ㏑(1.00 atm/0.0215 atm)/(10.0 ml/1.00 ml)

x = ㏑(1/0.0215)/10.0

x = -㏑0.0215/10.0

x = -(-3.84)/10

x = 0.384

Given that the ratio of molar heat capacities x = C'/C where

So, C'/C = x

(C + R)/C = x

So, making C subject of the formula, we have

C = R/(1 - x)

Substituting the values of the variables into the equation, we have

C = R/(1 - x)

C = R/(1 - 0.384)

C = R/0.232

C = 4.31R

Since C = (f/2)R where f = degree of freedom.

So, comparing both equation, f/2 = 4.31

f = 4.31 × 2

f = 8.62

f ≅ 9

So, in the isentropic expansion the gas particles have 9 degrees of freedom

We know that

Since the gas has degree of freedom f = 9, the structure of the particles show that it is a polyatomic gas.

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