Write on atomic orbital,bohr atom, dual nature of matter (with reference)​

Answer:

1

Explanation:

Answer:

1.

Explanation:

. .. ......... . ........

Answer:

the atoms expand  or go apart and get close together.

Explanation:

Hope this helps!

-BB

The reaction rate is the amount of a substance that is being reacted (or produced) over a certain period of time.

Substance is a term used to refer to a material or a substance that has mass and occupies space. It can also refer to a type of material that has unique properties and characteristics. It includes both tangible and intangible things such as liquids, solids, gases, and energy. It is a fundamental concept in chemistry and physics and is used to describe the physical properties of matter. For example, water is a substance composed of two hydrogen atoms and one oxygen atom. It has a distinct chemical formula and can be classified as a liquid at room temperature. Substance is also used in a more philosophical sense to refer to the underlying principles that compose a thing or idea.

Therefore, the reaction rate cannot be determined from the information provided.

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Answer:

   \(Hope this helps you\) A typical atom consists of three subatomic particles: protons, neutrons, and electrons (as seen in the helium atom below). Other particles exist as well, such as alpha and beta particles (which are discussed below). The Bohr model shows the three basic subatomic particles in a simple manner. Most of an atom's mass is in the nucleus—a small, dense area at the center of every atom, composed of nucleons. Nucleons include protons and neutrons. All the positive charge of an atom is contained in the nucleus, and originates from the protons. Neutrons are neutrally-charged. Electrons, which are negatively-charged, are located outside of the nucleus. \(Enjoy your day\)

Explanation:

Answer:

Atoms are the fundamental building blocks of all matter and are composed of protons, neutrons, and electrons. Because atoms are electrically neutral, the number of positively charged protons must be equal to the number of negatively charged electrons. Since neutrons do not affect the charge, the number of neutrons is not dependent on the number of protons and will vary even among atoms of the same element.

Explanation:

hope it helps

The model of Neils Bohr postulates that electrons in atoms are found in specific energy levels. Transition from a higher to a lower energy level produces an emission spectrum characteristic of elements.

According to Bohr's model of the atom, an electron in atom exists in distinct energy levels. Electrons can be promoted from lower to higher energy levels when they absorb energy. The electrons are unstable in this higher energy excited state hence they quickly return to the ground state emitting energy. This emission is characteristic of elements.

The following statements are true based on the Bohr model;

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Answer:

2. 389.15K , 3. 229.15K

Explanation:

K-273.15 = °C

Answer:

2395.323

Explanation:

Using a moles to grams calculator, 2395.323 was the output.

Answer: 6

Explanation:

If we are only looking at the number of oxygen atoms in the product then the answer is 6.

NO3 contains 3 oxygen atoms.

(NO3)2 means that we have 2 NO3 groups which means there are 6 oxygen atoms.

Answer:

³²P = 48.688%

³⁰P = 51.312%

Explanation:

The average mass is defined as the sum of each mass atom times its abundance. For the phosphorus with 2 isotopes with mass 30 and 32 uma, the average mass is defined as:

Average mass: Mass ³²P * Abundance + Mass ³⁰P * Abundance

30.97376 = 32 * X + 30 * Y (1)

Where X is abundance of ³²P and Y abundance of ³⁰P

Also, the sum of both abundance is 100% = 1:

1 = X + Y (2)

Replacing (2) in (1):

30.97376 = 32X + 30Y

30.97376 = 32X + 30(1-X)

30.97376 = 32X + 30-30X

30.97376 = 2X +  30

0.97376 = 2X

0.48688 = X

The percentage of ³²P is 0.48688*100 = 48.688%

And ³⁰P is 100 - 48.688 = 51.312%

Answer:

Nobelium or Beryllium

The other compound that makes up most of the other gases in the table is water vapor.

Water vapor is not listed in the table because it is not a pollutant. However, it is a significant component of exhaust gas, and it can contribute to smog formation. Water vapor is formed when the fuel in a petrol engine is burned. The combustion process produces water as a byproduct.

The amount of water vapor in the exhaust gas depends on the temperature of the combustion process. At higher temperatures, more water vapor is produced. Water vapor is not a pollutant in itself, but it can contribute to smog formation.

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Complete question:

this table shows the percentages of some gases in the exhaust from a petrol engine

nitrogen 68

carbon dioxide 15

carbon monoxide 1

oxygen 0.75

nitrogen oxides 0.24

hydrocarbons 0.005

sulphur dioxide 0.005

other gases

what is the name of the other compound that makes up most of the other gases in the table?

If the efficiency of a machine increases, it means that the machine is able to convert a higher percentage of its input energy into useful work output.

This could happen due to various factors, such as reducing friction, improving the design of the machine, or using more efficient components. The machine requires less energy input to perform the same amount of work. This could result in cost savings, reduced energy consumption, and lower environmental impact.

The output of the machine increases while the input remains constant. This could result in increased productivity, faster production rates, and improved performance. The wear and tear on the machine may decrease, as it is working more efficiently and experiencing less stress. This could result in longer machine life and reduced maintenance costs. Increasing the efficiency of a machine can have many positive effects, including cost savings, improved performance, and reduced environmental impact.

The complete question is

If the efficiency of a machine increases, what happen?

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Without further details on the specific cell and its components, it is not possible to provide a definitive answer regarding the pH change before and after the cell operates for 20 minutes.

The pH value of a solution can potentially change before and after the operation of a cell, depending on the specific reaction occurring in the cell and the nature of the electrodes involved.

However, without additional information about the specific cell and its components, it is difficult to provide a definitive answer. The pH of a solution is influenced by the concentration of hydrogen ions (H+) in the solution, which can be affected by various chemical reactions, including oxidation and reduction reactions occurring in the cell.

During the operation of a cell, the electrodes undergo chemical reactions, and ions from the electrolyte may participate in these reactions. These reactions can influence the concentration of hydrogen ions and potentially alter the pH of the solution. The direction of the pH change depends on the specific reactions occurring at the electrodes.

For example, in an electrolytic cell, the flow of electric current causes non-spontaneous redox reactions to occur. These reactions might involve the generation or consumption of hydrogen ions, which can affect the pH of the solution.

In a galvanic cell or battery, spontaneous redox reactions take place, and the pH changes can be more complex. The electrode materials, their potential, and the specific reaction kinetics can influence the pH changes in the solution.

Therefore, without further details on the specific cell and its components, it is not possible to provide a definitive answer regarding the pH change before and after the cell operates for 20 minutes. The pH change would depend on the specific reactions occurring in the cell and the behavior of the electrodes involved.

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Jake is receiving a functional magnetic resonance imaging (fMRI), which makes use of the fact that blood flow rises in regions of the brain that are active; particularly, hemoglobin carrying oxygen in the blood contains a ferrous (iron) molecule and as a result, has magnetic properties.

Because it makes it possible to correlate brain function and anatomy in people, derived from a structural rather than a functional MRI scan, fMRI has become a mainstay of contemporary neuroscience research. The amygdala is critical in processing emotion from faces, according to Adolphs. techniques that allow one to see the parts of the human brain that are triggered by various sorts of inputs, tasks, or actions. Functional magnetic resonance imaging is the most widely utilized method in perception research (fMRI). When stimulation of a small area on the receptor surface activates a disproportionately large area of the cortex, this phenomenon is known as cortical amplification.

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We can determine the following based on the provided information:

Metal nitrate A is a compound that, when heated, transforms into colourless gas, brown gas B, and a metal oxide with a yellowish brown hue. B. C: Colourless petrol C. B: Brown petrol C. D: Compound D, a yellow precipitate produced by the reaction of potassium iodide with an aqueous solution of compound A.

We may deduce that A is probably lead nitrate (Pb(NO3)2) because lead is frequently used in soldering alloys and the metal contained in A is utilised in an alloy for soldering purposes.

Identifications:

Lead nitrate, or Pb(NO3)2,

N2O: Nitrogen dioxide

B: Carbon (CO)

D: PbI2, or lead iodide.

Thus, this can be concluded regarding the given scenario.

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Your question seems incomplete, the probable complete question is:

A metal nitrate A on heating gives a yellowish brown coloured metal oxide along with brown gas B and a colourless gas C. An aqueous solution of A on reaction with potassium iodide forms a yellow precipitate of compound D. Identify A, B, C and D. Also, identify the types of reactions taking place. Metal present in A is used in an alloy which is used for soldering purposes.

Answer:

The concentration of one or more of the products is small.

The reaction will not proceed very far to the right.

The reaction will generally form more reactants than products  

Explanation:

We often write

K =[Products]/[Reactants]

Thus, if K is small

A. is wrong. Usually, if K < 1, the concentration of reactants is greater than that of the products.

The most useful use of nuclear technology is in medical field. For imaging human organs and in cancer treatment nuclear technology have a significant role.

The technology using the radiation emitted by a radioactive element is called the nuclear technology. We are familiar with the nuclear power plants where one of the most using energy generating source.

Beside in nuclear power plant, nuclear technology is using in agricultural field, medical field, space exploration, water desalination etc. In agricultural field, irradiation of suitable radiant energy helps to kill the harmful insects.

In medical field, especially in cancer treatments radioactive elements such as cobalt -60 is using in diagnosis and radiation is used to destroy the cancer cells. Therefore, the use of nuclear technology is of paramount importance.

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The partial pressure of \(N_2\)is 165.6 kPa and the partial pressure of \(H_2\)is 434.4 kPa.

To calculate the partial pressures of \(H_2\)and \(N_2\)in the 10dmcube container, we need to use the ideal gas law equation, which states that the pressure of a gas is directly proportional to its number of moles and temperature, and inversely proportional to its volume.

First, we need to calculate the number of moles for each gas. Since we are given the volume of each gas and the volume of the container, we can use the formula:

Number of moles = Volume / Molar volume

The molar volume is the volume occupied by one mole of a gas at a given temperature and pressure. At standard temperature and pressure (STP), the molar volume is 22.4 L/mol.

For \(N_2\), the number of moles is 2 dmcube / 22.4 L/mol = 0.089 mol
For \(H_2\), the number of moles is 5 dmcube / 22.4 L/mol = 0.223 mol

Next, we can calculate the partial pressures of each gas using the formula:

Partial pressure = (Number of moles / Total number of moles) * Total pressure

The total pressure is the sum of the pressures of each gas:

Total pressure = Pressure of N2 + Pressure of \(H_2\)

Given that the pressure of N2 is 100 kPa and the pressure of \(H_2\)is 500 kPa, we have:

Total pressure = 100 kPa + 500 kPa = 600 kPa

Now we can calculate the partial pressure of \(N_2\):

Partial pressure of \(N_2\)= (0.089 mol / (0.089 mol + 0.223 mol)) * 600 kPa = 165.6 kPa

Similarly, we can calculate the partial pressure of \(H_2\):

Partial pressure of H2 = (0.223 mol / (0.089 mol + 0.223 mol)) * 600 kPa = 434.4 kPa

Therefore, the partial pressure of \(N_2\)is 165.6 kPa and the partial pressure of \(H_2\)is 434.4 kPa.

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Answer:

4.5 × 10⁷ N

Explanation:

Step 1: Given data

Step 2: Calculate the force (F) that the rocket engines must supply

We can calculate the required force using Newton's second law of motion.

F = m × a

F = 800,000 kg × 56 m/s²

F = 4.5 × 10⁷ N

The required force is 4.5 × 10⁷ Newton.

Transition metals

Most transition metals differ from the metals of Groups 1, 2, and 13 in that they are capable of forming more than one cation with different ionic charges. As an example, iron commonly forms two different ions

Answer:

\(Cu_2O\)

Explanation:

Hello!

In this case, according to the law of conservation of mass, it is possible to realize that the mass of oxygen comes from the subtraction of the total mass and the mass of copper:

\(m_O=5.62g-5.00g\\\\m_O=0.62gO\)

Next, we compute the moles of both Cu and O given their atomic masses:

\(n_{Cu}=5.00gCu*\frac{1molCu}{63.546gCu}=0.0787molCu\\\\n_O=0.62gO*\frac{1molO}{16.0 gO}=0.03875molO\)

Now, we divide by the moles of oxygen as the fewest ones, in order to calculate their subscripts in the empirical formula:

\(Cu=\frac{0.0787}{0.03875} =2.0\\\\O=\frac{0.03875}{0.03875} =1\)

Therefore, the empirical formula turns out to be:

\(Cu_2O\)

Best regards!

The total kilojoules in two tablespoons is  836.8 kJ.

To determine the total kilojoules in two tablespoons of a substance, we need to know the specific substance and its energy content per tablespoon. Different substances have different energy values, so without this information, it is not possible to provide an accurate calculation.

The energy content of food or substances is typically measured in kilocalories (kcal) or kilojoules (kJ). 1 kilocalorie is equal to 4.184 kilojoules. The energy content of a substance is often listed on food labels or in nutritional databases.

For example, if we have the energy content of a substance as 100 kilocalories (kcal) per tablespoon, we can convert it to kilojoules by multiplying it by 4.184:

100 kcal * 4.184 kJ/kcal = 418.4 kJ

So, if we have two tablespoons of this substance, the total energy would be:

418.4 kJ/tablespoon * 2 tablespoons = 836.8 kJ

It's important to note that the energy content of a substance can vary depending on its composition, density, and other factors. Therefore, it is always recommended to refer to reliable sources such as food labels, nutritional databases, or consult a qualified professional to obtain accurate information regarding the energy content of specific substances.

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Answer:

D.

I guessed

Explanation:

Answer: Delta

Explanation:

Answer:

option B = 0.410 g

Explanation:

hope this helps have hope i get brainliest

Answer:The law of conservation of energy

Explanation:

states that the total energy is constant in any process. Energy may change in form or be transferred from one system to another, but the total remains the same.

Some tips to follow when doing lab practical are:

From the table, Column 1 represents the time in half-life cycles, ranging from the initial state to 8 cycles. Column 2 shows the predicted number of radioactive atoms at each time point, based on the assumption that the number of atoms reduces by half in each half-life cycle.

Column 3 represents the simulated number of radioactive atoms at each time point and corresponds to the predicted values of the simulation.

In conclusion, the results as outlined in the lab guide are A=  27 B=  16 C=  9 D=  4 E=  2 F=  2 G=  0 H= 0.

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#complete question:

Do step 3 as outlined in the lab guide. Record your results in the appropriate blanks. A = B = C = D = E = F = G = H = A 3-column table with 9 rows. Column 1 is labeled Time half-life cycles, n with entries Initial, 1, 2, 3, 4, 5, 6, 7, 8. Column 2 is labeled Predicted radioactive atoms with entries 100, 50, 25, 13, 6, 3, 2, 1, 0. Column 3 is labeled Simulated radioactive atoms with entries 100, A, B, C, D, E, F, G, H.

Answer:

D. Maintaining a high temperature will require burning fossil fuels or

using a great deal of electricity.

Explanation:

The chemical plant produces ammonia using the following reaction at high temperature and high pressure the issue is  "Maintaining a high temperature will require burning fossil fuels or using a great deal of electricity.

An industrial processing facility known as a "chemical plant" produces chemicals, typically on a large scale.

The components of fossil fuels are decaying plants or animals. These fuels may be consumed to provide energy and could be discovered in the crust of the Earth. Fossil fuels include, for example, coal, oil, as well as natural gas.

Therefore, the chemical plant produces ammonia using the following reaction at high temperature and high pressure the issue is  "Maintaining a high temperature will require burning fossil fuels or using a great deal of electricity.

Hence, the correct answer will be option (D)

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