Help me please !!!
Which of the following can be inferred from the diagram above that shows the dependence of potential Energy on the Internuclear distance between two atoms?

A)The atoms form a bond with a bond length of 25 pm
B)The atoms form a bond with a bond length of 75 pm
с)The net force between the atoms is attractive at 25 pm
D)The net force between the atoms is attractive at 75 pm

The volume of the aluminum block is 0.4815 mL.

The mass of the aluminum metal is given as 1.3 g, and the density of aluminum metal is given as 2.7 g/mL.

The formula to calculate the volume of an object is as follows:

Volume = mass / density

The units of mass and density must be the same in order to use this formula, therefore the density should be converted to grams per cubic millimeter.

1 milliliter (mL) = 1 cubic centimeter (cm³)1 cm³

                        = 1 x 1 x 1

                        = 1 mL

1 g = 1 cm³

2.7 g = 2.7 cm³

The conversion factor is therefore

1 mL = 1 cm³,

1 g = 1 cm³.

Substituting the values in the formula above:

Volume = mass / density

              = 1.3 g / 2.7 g/mL

              = 0.4815 mL

Therefore, the volume of the aluminum block is 0.4815 mL.

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Answer:

carbon dioxide produced, or carbon monoxide, soot produced and Soot can cause breathing problems and it blackens buildings.

Explanation:

During complete combustion carbon and hydrogen combine with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). During incomplete combustion part of the carbon is not completely oxidized producing soot or carbon monoxide (CO).

Answer:

Sodium (Na) — Will lose electrons

Silicon (Si) — Will lose electrons

Argon (Ar) — No reaction

Hope this helps.

The kind of intermolecular force present in BCl₃ is london dispersion force.

London Dispersion forces are a part of wan-der-vals forces. The instantaneous dipole–induced dipole attractions are called London dispersion forces.

London’s dispersion force < dipole-dipole < H-bonding < Ion-ion

London dispersion forces are the weakest intermolecular force.

The unequal distribution of electrons about the nucleus in an atom induces a dipole in the atom. When another atom or molecule comes in contact with this induced dipole, it can be distorted and leads to an electrostatic attraction between atoms or molecules.

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Answer:

1.46 X 10^24 fu Na2CO3

Explanation:

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 1.42×10²⁴ formula units are present in 256.3 g sodium carbonate.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

mole =given mass ÷ molar mass

Molar mass of 1 mole of sodium carbonate= 107.87 g/mol

mass of sodium carbonate=256.3 g

mole =256.3 g ÷ 107.87 g/mol

        =2.37moles

number of formula units of sodium carbonate=number of moles of sodium carbonate× 6.022×10²³

number of formula units of sodium carbonate=2.37moles× 6.022×10²³

number of formula units of sodium carbonate=1.42×10²⁴

Therefore, 1.42×10²⁴ formula units are present in 256.3 g sodium carbonate.

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Answer:

It's D. because it has negative charge and same mass as neutrons

Answer:

You determine the net force of an object by adding up all of the individual forces.

Explanation:

If N is the number of forces acting on the body, the net force formula is:

\(F_{Net}\) = \(F_{1}\) + \(F_{2}\) + \(F_{3}\) ....+ \(F_{N}\)

Where \(F_{1}\), \(F_{2}\), and \(F_{3}\) as forces acting on a body.

When a body is at rest, the net force formula is given by

\(F_{Net}=F_{a}+F_{g}\)

Fa = Applied force and

Fg = Gravitational force.

Example:

A truck is standing still and a force of 70 N is applied on it. If the frictional force is 20 N, then what will be the net force?

Solution:

Given

Applied force Fa = 70 N

Frictional force Ff = 20 N

The net force formula is given by

FNet = Fa + Ff

FNet = 70 + (-20)

FNet = 50 N

Therefore, the net force is 50 N

Answer:

I believe its F: 2.55

Explanation:

I know I'm very late, positive you're past this question, I'd hope at least.

Answer:

A because galaxy turns jggf

Answer:

Explanation:

volume of spherical ball = 4/3 x π R³

= 4 x 3.14 x .5³ / 3

= .5233 cm³ or ml.

mass = 2 g

density = mass / volume

= 2 / .5233

= 3.8 g / ml .

So its density is more than that of water , hence it will sink into water .

We need to make a lucite sleeve with a thickness of at least 1.29 mm to prevent beta particles from passing through.

To calculate the required thickness of the lucite sleeve, we need to consider the stopping power of the material. Beta particles are electrons that can be stopped by materials with high electron density, such as lucite.

First, we need to calculate the range of the beta particles in the glass wall of the syringe. We can use a range-energy relationship to estimate the range:

R = 0.412 * Emax^1.65

Where R is the range in g/cm2, and Emax is the maximum energy of the beta particles in MeV. For 90Sr, the maximum energy is 2.28 MeV.

R = 0.412 * 2.28^1.65
R = 0.412 * 7.07
R = 2.91 g/cm2

Next, we need to calculate the thickness of lucite required to stop the beta particles. We can use the concept of range straggling to estimate the thickness:

d = 1.96 * Rho * R / (Z * Z * dE/dx)

Where d is the thickness in cm, Rho is the density of the material in g/cm3, Z is the atomic number of the material, and dE/dx is the stopping power of the material in MeV/(g/cm2).

For lucite, Z is approximately 6, and dE/dx is 2.27 MeV/(g/cm2) for beta particles with energies between 0.5 and 3 MeV.

d = 1.96 * 1.2 * 2.91 / (6 * 6 * 2.27)
d = 0.129 cm = 1.29 mm

Therefore, we need to make a lucite sleeve with a thickness of at least 1.29 mm to prevent beta particles from passing through.

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Answer:

yes

Explanation:

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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In Chemistry, we always have to balance the equations, in many topics within the subject of Chemistry, it is required to do that, this is because we have to account for every atom in the reaction, on both sides, reactant and product, the same number of atoms that are on the reactants side must be on the products side. Therefore, the best answer for this question will be letter D

The question requires us to calculate the mass, in grams, contained in 5.26 x 10^-4 mol of HC2H3O2.

To solve this question, first we need to calculate the molar mass of the compound, considering the number of atoms of each element, and then relate the value obtained with the number of moles given (5.26 x 10^-4 mol).

First, to calculate the molar mass of the compound, let's consider the following atomic masses:

atomic mass of C = 12.01 u

atomic mass of H = 1.007 u

atomic mass of O = 15.99 u

Next, we calculate the molar mass. To do that, we need to consider the number of atoms of each element: according to the chemical formula, there are 2 atoms of C, 4 atoms of H and 2 atoms of O:

molar mass (C2H4O2) = (2 * 12.01) + (4 * 1.007) + (2 * 15.99) = 60.03 g/mol

Now, we know that there are 60.03 g for each mol of the compound. With that information, we can estabilish the following relation to calculate the mass contained in 5.26 x 10^-4 mol of the compound:

1 mol --------------------- 60.03 g

5.26 x 10^-4 mol ----- x

Solving for x, we have:

Therefore, there are 0.03158 g of HC2H3O2 in 5.26 x 10^-4 mol of this compound.

The equation for the molar enthalpy change as a function of temperature is given by:

H = C-p * (T,f - Ti)

Where C-p is the heat capacity of the substance, T,f is the final temperature, and Ti is the initial temperature.

The heat capacity of a substance is a measure of the amount of energy (heat) required to raise the temperature of a given mass of the substance by one degree Celsius. It is often expressed in the unit of J/mol⋅K.

The molar enthalpy change can be used to determine the energy released or absorbed during a chemical reaction. For exothermic reactions, the molar enthalpy change is negative, indicating that energy has been released during the reaction. For endothermic reactions, the molar enthalpy change is positive, indicating that energy has been absorbed during the reaction.

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a) a compound always contains at least 2 elements

is the answer

Answer:

Just look up specific heat capacity of a certain element and it should give you the specific heat in the form of energy/mass×temperature i.e J/kg°C (joules per kilogram, and degrees celsius).

thermal conduction and convection processes we explain the temperature profile: warmer at the bottom and colder at the top

Temperature is a measure of the internal energy of molecules.

When the pot is on the burner, the lower part of the pot acquires energy from the flame, this energy increases the temperature of the metal that is in contact with the liquid from the bottom, by a process of thermal conduction, while the liquid in the top is kept at the same temperature.

As time progresses, the hotter lower liquid, for which it has a lower with the metal bottom heats up by conduction. density, conscientiously rise and a transfer of heat is created by convection, which raises the temperature of the hot liquid and makes the liquid fall that is colder from the upper part than at the coming into contact

This cycle is repeated heating all the liquid. But the liquid with the liquid in the lower part always at a higher temperature than the liquid in the upper part, the process stops when the liquid in the lower part reaches the boiling point, than the passage from liquid to gas, during which the temperature remains constant.

With the thermal conduction and convection processes we explain the temperature profile: warmer at the bottom and colder at the top.

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Answer:

0.93g/mL

Explanation:

Given parameters

Mass of wood  = 3.16g

Initial volume of water  = 20mL

Volume of water + wood  = 23.4mL

Unknown:

Density of the wood  = ?

Solution:

Density is the mass per volume of a substance.

 It is mathematically expressed as;

       Density  = \(\frac{mass}{volume}\)

Volume of wood = 23.4mL  - 20mL = 3.4mL

So,

    Density = \(\frac{3.16}{3.4}\)   = 0.93g/mL

To solve this we must be knowing each and every concept related to moles. Therefore, 0.11moles of oxygen were burned and 0.222 moles of water were formed.

A mole is merely a measuring unit. In reality, it is among the International System on Units' seven foundation units (SI). When basically determines are insufficient, new units are created.

Chemical reactions frequently occur at levels that use grams would be inappropriate, but using actual figures of atoms/molecules/ions would also be misleading. As a result, scientists devised the mole for bridge the divide between extremely small and extremely huge numbers.

2H\(_2\) + O\(_2\) \(\rightarrow\)  2H\(_2\)O

The mole ratio between hydrogen gas and oxygen gas is 2:1

moles of hydrogen gas = 0.222 moles

moles of oxygen gas =0.11moles

moles of water formed = 0.222 moles

Therefore, 0.11moles  of oxygen were burned and 0.222 moles of water were formed.

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The total pressure of the gas mixture is approximately 68.97 kPa.

To calculate the total pressure of the gas mixture, we need to consider the partial pressures of each component.

Given:

Mass of methane (CH4) = 359 mg

Mass of argon (Ar) = 212 mg

Mass of nitrogen (N2) = 256 mg

Partial pressure of nitrogen (N2) = 16 kPa

Step 1: Convert the masses of each component to moles using their respective molar masses:

Molar mass of methane (CH4) = 16.04 g/mol

Molar mass of argon (Ar) = 39.95 g/mol

Molar mass of nitrogen (N2) = 28.01 g/mol

Number of moles of methane (nCH4) = (359 mg / 1000) / (16.04 g/mol)

Number of moles of argon (nAr) = (212 mg / 1000) / (39.95 g/mol)

Number of moles of nitrogen (nN2) = (256 mg / 1000) / (28.01 g/mol)

Step 2: Calculate the mole fractions of each component:

Mole fraction of methane (χCH4) = nCH4 / (nCH4 + nAr + nN2)

Mole fraction of argon (χAr) = nAr / (nCH4 + nAr + nN2)

Mole fraction of nitrogen (χN2) = nN2 / (nCH4 + nAr + nN2)

Step 3: Calculate the partial pressures of each component:

Partial pressure of methane (PCH4) = χCH4 * Total pressure

Partial pressure of argon (PAr) = χAr * Total pressure

Partial pressure of nitrogen (PN2) = χN2 * Total pressure

Since the partial pressure of nitrogen is given as 16 kPa, we can substitute the values into the equation above to solve for the total pressure:

PN2 = χN2 * Total pressure

16 kPa = χN2 * Total pressure

Step 4: Solve for the total pressure (Total pressure = PN2 / χN2):

Total pressure = 16 kPa / χN2

Let's perform the calculations:

Step 1:

nCH4 = (359 mg / 1000) / (16.04 g/mol) ≈ 0.022 mol

nAr = (212 mg / 1000) / (39.95 g/mol) ≈ 0.0053 mol

nN2 = (256 mg / 1000) / (28.01 g/mol) ≈ 0.0091 mol

Step 2:

χCH4 = nCH4 / (nCH4 + nAr + nN2) ≈ 0.615

χAr = nAr / (nCH4 + nAr + nN2) ≈ 0.153

χN2 = nN2 / (nCH4 + nAr + nN2) ≈ 0.232

Step 3:

PCH4 = χCH4 * Total pressure

PAr = χAr * Total pressure

PN2 = χN2 * Total pressure

Step 4:

Total pressure = PN2 / χN2 = (16 kPa) / (0.232) ≈ 68.97 kPa

Therefore, the total pressure of the gas mixture is approximately 68.97 kPa.

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The balanced equation for hydrogen sulfide burns in oxygen to form sulfur dioxide and water vapor is as followed:

\(2H_2S_{(g)} + 3O_{2(g)}\) → \(2SO_{2(g)} + 2H_2O{(g)}\)

The chemist's shorthand for expressing the molecules and atoms involved in a chemical reaction using chemical symbols is a balanced chemical equation. Reactants are on the left side of the equation, and products are on the right. The coefficients and subscripts both show how many molecules are involved, along with how many atoms are found in each molecule.

Chemical equations are similar to algebraic equations in that they can be "balanced" based on the interactions of the constituent chemicals, understanding of the law of conservation of mass, and practice with a few example equations.

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The name of the compound which is formed by the combination of nitrogen, carbon and hydrogen atoms is ethylamine.

Compounds are the substances which are prepared by the mixture of different elements.

In the question it is described that first nitrogen atom is attached with 2 hydrogen atoms and one lone pair of electrons as \(\ddot{NH_{2}}\\\). Now with this molecule one carbon atom with two hydrogen atoms are attached (CH₂) and with this carbon atom another carbon atom with three hydrogen atoms are attached as (CH₃).

So obtained compound is NH₂-CH₂-CH₃ named as ethyl amine.

Hence name of the given compound is ethylamine.

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Answer:

Explanation:

If it is at a higher energy level, it is said to be excited, or any electrons that have higher energy than the ground state are excited. They are then called degenerate energy levels.

Answer:

i believe its gas sorry if i am wrong

Explanation: