What’s the molar mass of Lead-208

Option 3: By removing hydrogen because of fluorine's attraction to hydrogen's nucleus.

The reaction of ethene and halogen generally breaks the carbon-carbon double bond and substitution of halogen on carbon takes place, this is known as halogenation reaction. This is in the case of reaction of ethene with chlorine, bromine and iodine. In the case of fluorine,  due to high electronegativity it get attracts to the nucleus of hydrogen and form hydrogen fluorine gas. Therefore, halogentaion reaction do not take place in the case of ethene and iodine.

Ethene explosively reacts with fluorine to form carbon and hydrogen fluoride gas. The reaction is as follows:

[tex]CH_{2}CH_{2}+2F_{2}\rightarrow 2C+4HF[/tex]

The process best explains the astounding variety of dogs at a dog show is selective breeding. Therefore, option C is correct.

Choose parents from a mixed population who exhibit these characteristics. They have been bred together. To produce the next generation, select the best offspring with the desired characteristics. Repeat the process for many generations until all offspring exhibit the desired characteristics.

Selective breeding within a gene pool can result in more subtle types of breed evolution, which can result in significant changes in breed type over time. In fact, few breeds have not gone through this type of evolution.

This process entails selecting and breeding animals with desirable characteristics, resulting in offspring with the same traits. When selective breeding is taken to its logical conclusion, it can result in the development of genetic disorders.

Thus, option C is correct.

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To calculate the molarity of the sucrose solution, you first find the total volume of the solution, then calculate the number of moles of sucrose, and finally divide the moles of sucrose by the volume of the solution in liters. The molarity of the given sucrose solution ends up being approximately 2.67 M.

The molarity of a solution, expressed in moles of solute per liter of solution (mol/L), is calculated by first determining the total volume of the solution. Given the density (1.34 g/mL) and the mass of the solution (211.4 g sucrose + 100 g water = 311.4 g), the volume of the solution is found by dividing total mass by the density: 311.4 g / 1.34 g/mL = 232.39 mL or 0.232 L.

Next, we find the number of moles of sucrose, which is the mass of sucrose divided by its molar mass: 211.4 g / 342 g/mol = 0.618 moles.

From these calculations, the molarity can then be calculated as moles of sucrose divided by the volume of the solution in liters: 0.618 mol/0.232 L = 2.67 M.

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The molarity of the solution is calculated by dividing the moles of sucrose by the volume of the solution. The moles of sucrose is found by dividing the mass of sucrose by its molar mass, and the volume of the solution is calculated from the total mass of the solution and its density. The calculated molarity of the solution is 2.66 M.

The question is asking for the molarity of the solution. Molarity (M) is a measure of concentration and is calculated by taking the amount of solute (in moles) divided by the volume of the solution (in liters). In this case, we know the mass of the solute (sucrose) and its molar mass, so we can calculate the moles of sucrose in the solution using these values. The mass of sucrose is 211.4 g and the molar mass is 342 g/mol, so the number of moles of sucrose is 211.4 g / 342 g/mol = 0.618 moles.

Next, we need to determine the volume of the solution. We know that the density of the solution is 1.34 g/mL and that 1 mL is equal to 1 cm^3. From the problem, we know that there are 211.4 g sucrose + 100 g water = 311.4 g in the solution. Therefore, the volume of the solution is 311.4 g / 1.34 g/mL = 232.24 mL, which converts to 0.23224 L. Now, we can calculate the molarity by dividing the moles of sucrose by the volume of the solution: 0.618 moles / 0.23224 L = 2.66 M.

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The weight of an object with a mass of 40 kilograms on the Moon would be 66.8 Newtons, as weight is calculated by multiplying the mass by the lunar gravitational acceleration of 1.67 m/s².

If the mass of an object on Earth is 40 kilograms, and assuming that mass does not change regardless of location, this mass would remain the same on the Moon. However, since weight is a measure of the force of gravity on an object, it will vary depending on the gravitational pull of the body it is on. The gravitational acceleration on the Moon is 1.67 m/s². Therefore, on the Moon, the weight of a 40 kg object would be calculated as follows:

Weight on the Moon = mass × moon's gravitational acceleration

Weight on the Moon = 40 kg × 1.67 m/s²

Weight on the Moon = 66.8 N (Newtons)

So, if an object has a mass of 40 kilograms, its weight on the Moon would be 66.8 Newtons.

The correct answer is:    [C]:

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             →  " the Coriolis effect " .

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Hope this helps!

       Best wishes!

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Answer:

A

Explanation:

that's the right answer can't think of an explanation but it just make must sense

The results of a genetic test can confirm or rule out a suspected genetic condition. People may be treated differently if certain genetic information is known about them. The correct option is A.

DNA testing also called the genetic testing is a type of medical test which identifies the changes in genes, chromosomes or proteins. It helps to determine a person's chance of developing or passing on a genetic disorder. More than 77,000 genetic tests are currently in use.

Genetic testing is voluntary. Because testing has benefits as well as limitations and risks. The decision about whether to be tested is a personal and complex one. A geneticist can help by providing information about pros and cons of the test.

The main reason for the high cost of genetic testing is the complexity of the process involved. The cost depends on several factors like the nature of the test.

Thus the correct option is A.

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The student's inquiry is too vague - more details about the subject or task are required to provide effective assistance.

Unfortunately, you have not provided enough information for me to be able to assist you effectively. Please provide more detail about the topic, subject, or specific question you need help with. Remember, the more you KNOW about what needs to be done today increases the chance you'll be ready for TOMORROW. Despite the pressure, take your time to understand the task - trying to rush through without fully understanding can lead to mistakes.

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Answer:

Explanation

Answer:

Astatine  are halogens only

Nitrogen  are non metals only

Krypton (Kr) is noble gas only

Chlorine (Cl):  halogen

Sulfur (S)  non metals only

Explanation:

Answer:

D

Explanation:

Positron emission = emission of a positron and a neutrino when a proton is convert into a neutron. The total number of particles in the nucleus doesn't change, -1 proton +1 neutron

It's a spontaneous reaction for some nucleus.

eg:

Positron = e+

Neutrino=ve

O-15 --> N-15 + e+ +ve

Electron capture= A nucleus absorb an electron while a proton is convert in a neutron and emit a neutrino. The total number of particles in the nucleus doesn't change, -1 proton +1 neutron

eg:

Al-26 +e- --> Mg-26 + ve

Electron capture and positron emission are two mechanisms to explain the decay of some unstable isotopes. Electron capture is usually observed when the energy difference between the initial and final state is low. Mainly because of the larger amount of kinetic energy need for the expulsion of two particles with the positron emission mechanism.

C. The design would not be cost-efficient; the plane would require more fuel due to increased thrust from higher drag.

Adding protrusions to the wings of an airplane, such as fuel pods and missiles, will likely result in increased drag, impacting the speed, fuel efficiency, stability, maneuverability, and safety of the airplane.

The likely drawback to adding protrusions to the wings, such as fuel pods, water tanks, and missiles, is increased drag. Drag is the resistance encountered by an object when it is moving through a fluid, such as air. Any protrusions on the wings will create extra surfaces that disrupt the smooth flow of air over the wings, resulting in increased drag.

Increased drag can have several negative effects on the airplane. It can reduce the airplane's speed and fuel efficiency, making it less economical to operate. Additionally, increased drag can make the airplane less stable and maneuverable, affecting its handling and safety.

Therefore, while the extra storage may be beneficial, the increased drag is a likely drawback of this design.

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The energy produced by a hydrogen fuel cell that uses 1kg of hydrogen to produce a certain amount of water can be calculated using Einstein's mass-energy equivalence principle (E=mc²). Because the converted mass is approximately 1 kg, the energy produced is approximately 9 × 10⁶ Joules.

The question is asking how much energy a hydrogen fuel cell produces if it uses 1kg of hydrogen to produce a certain amount of water. Hydrogen fuel cells work through an electrochemical reaction of hydrogen and oxygen, producing water and energy.

The energy production can be calculated through E=mc², Einstein's mass-energy equivalence principle. Here, 'E' is energy, 'm' is mass, and 'c' is the speed of light. According to the data provided, the mass converted into energy is the difference between the initial hydrogen mass (1 kg) and the mass of the water produced (1.10 x 10-11 kg), which is approximately 1 kg. Therefore, the energy produced would be E=mc² = 1 kg × (3 × 10⁸ m/s)² = 9 × 10⁶ Joules.

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Answer:

a). lever and wedge

Explanation:

The two simple machines that are used in a pair of scissors are --

Lever and a wedge

i). Lever : A lever is a type of a simple machine that contains a long bar which is pivot at a point which is fixed. This fix point is known as the fulcrum of the lever.

ii). Wedge : A wedge is also a type of a simple machine which has two planes inclined to each other and that can move. It is generally used for cutting.

Answer - I would think temperature is a measurement of energy, but I'm probably wrong. If anyone gets the correct answer, please correct me.

Explanation - Temperature is a measure of the average kinetic energy of the particles in an object. When temperature increases, the motion of these particles also increases.

I hope this helps, my apologies if it doesn't.