what is the electical charge on the nucleus of the boron atom ?

Answer:

B. 275 kPa

Explanation:

Since we need to find the greater value, because 1.50<2.5, then the only greater value would be 275 kPa.

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

\( \frac{5 \times {10}^{4} }{2.5 \times {10}^{2} } = 2 \times {10}^{2} \\ \)

So the correct answer is (( a )) .

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

P-aminophenol has a molar mass of 109.13 g/mol. Acetaminophen has a molar mass of 151.17 g/mol. Acetic anhydride has a capacity of 1.1 mL.

The mass of acetaminophen, stated as 0.157g, must be multiplied by the molar mass of acetaminophen to get the theoretical yield. It weighs 151.2g in this case. The theoretical yield thus becomes 0.217g.

A measurement called production yield is obtained by dividing the number of high-quality parts produced by the total number of parts started in production.

To know more about  theoretical yield visit:-

https://brainly.com/question/14966377

#SPJ4

Answer:

No.

Explanation:

Energy is releasing into your body via a process of chemical reactions called respiration. Without respiration, energy cannot be released from food and transfered to cells.

Answer:

Increase in temperature will not affect a solid - liquid mixture. Example can be taken of salt and water

Answer:

8

Explanation:

oxygen has an atomic number equal to 8. This means that the neutral oxygen atom has 8 electrons.

Answer:

I think that the first one is right(A)

Answer:

Hard water is water that has high mineral content, Soft water is free from dissolved salts of such metals as calcium, iron, or magnesium

Explanation:

The freezing point of the solution made by mixing 42.0 grams of NH3 with 420.0 grams of water is -10.9 °C. To calculate the freezing point of a solution, we need to use the formula the change in freezing point.

ΔTf = Kf × m

where ΔTf is the change in freezing point, Kf is the freezing point depression constant of the solvent, and m is the molality of the solution.

First, we need to find the molality of the solution, which is the number of moles of solute per kilogram of solvent. We can find the number of moles of NH₃ using its molar mass:

mNH₃ = 42.0 g / 17.03 g/mol = 2.46 mol

Next, we need to find the mass of water in kilograms:

mH₂O = 420.0 g / 1000 g/kg = 0.420 kg

Now we can calculate the molality of the solution:

molality = 2.46 mol / 0.420 kg = 5.86 m

The freezing point depression constant for water is Kf = 1.86 °C/m. Therefore, the freezing point depression is:

ΔTf = 1.86 °C/m × 5.86 m = 10.9 °C

Finally, we can calculate the freezing point of the solution by subtracting the freezing point depression from the freezing point of pure water, which is 0 °C:

freezing point = 0 °C - 10.9 °C = -10.9 °C

Learn more about The Freezing point: https://brainly.com/question/31357864

#SPJ11

Answer:

2

Explanation:

The addition of alumina particulate reinforcement to the aluminum alloy matrix is likely to improve the fracture toughness of the cylinders.

The incorporation of alumina (Al2O3) particulate reinforcement into the aluminum alloy matrix can have a positive impact on the fracture toughness of the cylinders. The addition of these reinforcing particles can enhance the mechanical properties and performance of the material by mitigating crack propagation and improving resistance to fracture.

The primary mechanism through which alumina particulate reinforcement improves fracture toughness is the crack bridging effect. When a crack initiates in the material, the alumina particles act as obstacles for the crack propagation. These particles impede the crack's progress by bridging the crack faces, which increases the energy required for further crack propagation. As a result, the fracture toughness of the material is improved, as it becomes more resistant to crack growth.

Additionally, the presence of alumina particles in the metal matrix composite (MMC) can induce residual compressive stresses around the particles. These compressive stresses act as a form of internal reinforcement, resisting crack initiation and growth. The compressive stresses effectively increase the critical stress required for crack propagation, thereby enhancing the fracture toughness of the material.

It is important to note that the size, shape, and distribution of the alumina particles play a significant role in determining the magnitude of improvement in fracture toughness. Optimal particle size and uniform dispersion are crucial to achieve the desired strengthening effects. The choice of processing techniques and parameters for fabricating the MMC will also impact the microstructure and ultimately influence the fracture toughness.

In summary, the addition of alumina particulate reinforcement to the aluminum alloy matrix is likely to enhance the fracture toughness of the cylinders. The crack bridging effect and the induction of residual compressive stresses are the key micromechanisms responsible for this improvement. Careful consideration of particle characteristics and fabrication techniques is essential to maximize the benefits of alumina reinforcement in the metal matrix composite.

Learn more about Addition

brainly.com/question/29464370

#SPJ11

Answer:

Long bones contain yellow bone marrow and red bone marrow, which produce blood cells.

Explanation:

Have a nice night!

The majority of your blood cells are produced in your bone marrow. This is known as haemopoiesis. In children, haemopoiesis occurs in the long bones, such as the thighbone (femur). Adults have it mostly in their spine (vertebrae), hips, ribs, skull, and breastbone (sternum).

Hematopoiesis is the process by which all the cellular components of blood and blood plasma are produced. It happens in the hematopoietic system, which includes organs and tissues like bone marrow, liver, and spleen. Simply put, hematopoiesis is the process by which the body produces blood cells.

The bone marrow is where blood cells are created. The soft, spongy material in the center of the bones is called bone marrow. It generates approximately 95% of the body's blood cells. The pelvic bones, breastbones, and spine bones contain the majority of the adult body's bone marrow.

Red cells are constantly produced in the marrow of certain bones. As previously stated, the marrow is the primary site of red cell production, known as erythropoiesis, in adults.

Thus, The majority of your blood cells are produced in your bone marrow. This is known as haemopoiesis.

To learn more about haemopoiesis, follow the link;

https://brainly.com/question/24372216

#SPJ2

Answer:

D

Explanation:

Because it's d so yeah

The satellite image where the scientists locate the area by representing the existence of rift valleys.

A rift valley refers to the lowland region where it created at the time when there should be tectonic plates of the earth that should be moved apart or rifted. A rift valley should be lowland region that should be created at the time when earth tectonic plates should be moving part. It should be founded both on the land and at the bottom of the ocean.

Therefore, we can conclude that the option d is correct.

Learn more about area here: https://brainly.com/question/16660726

It is true that according to Hubble's law, the farther away a galaxy is, the faster it is moving away from us.

It is true that the formation of a star occurs when nuclear fusion begins to fuse light elements into heavier ones;

The distance to the nearest stars can be determined by parallax, the apparent shift of a start against background stars observed as the earth moves along its orbit. (Option B)

Based on the accompanying H-R Diagram, the type of start that has the greatest temperature is the blue giants (Option C)

Two hydrogen atoms come together in a nuclear fusion reaction to produce Helium Gas. (Option A).

Hubble's law, which essentially states that the velocity of a galaxy (or, as it is commonly plotted, its redshift) is precisely proportionate to its distance, also reveals crucial information about the condition of the universe. There should be no relationship between distance and velocity if the cosmos is static and unchanging.

Hubble's law is the physical cosmology observation that galaxies move away from Earth at a rate proportionate to their distance. In other words, the farther they are from Earth, the quicker they are travelling away.

Learn more about Hubble Law:
https://brainly.com/question/13705068
#SPJ1

Answer:

Hydrogen Bonding

Explanation:

Oxygen gas O2 is a compound, a molecule and a pure substance.

Oxygen gas is a compound because it contains more than one atom( two oxygen atoms) that are chemically combined together.

Oxygen gas is a molecule because it can exist independently as a unit and the oxygen atoms are covalently bound.

It is a pure substance because it contains only oxygen molecules.

Learn more: https://brainly.com/question/19922822

Answer:

see explanation

Explanation:                      

Mechanical advantage actually uses the amplification in the force which we can achieve by using a device or a complete mechanical system. The mechanical advantage of a pulley system that can lift a 120 N load with an input force of 20 N is 6 N.

The ratio of the load to the effort of a machine is defined as the mechanical advantage. It gives the efficiency of a machine. The equation used to calculate the mechanical advantage is:

Mechanical advantage = Load / Effort

Mechanical advantage = 120 / 20 = 6 N

To know more about mechanical advantage, visit;

https://brainly.com/question/6968974

#SPJ1

The melting point of (2R,3S)-2,3-dibromo-3-phenylpropanoic acid is dependent on several factors, including the purity of the compound and the presence of any impurities.

Therefore, an exact melting point cannot be provided without specific experimental data. However, it is generally observed that organic compounds have a range of melting points rather than a single specific value.

If you are conducting an experiment and need to determine the melting point of (2R,3S)-2,3-dibromo-3-phenylpropanoic acid, it is recommended to perform the melting point determination experimentally using appropriate laboratory techniques and equipment. This involves heating a small amount of the compound and observing the temperature range at which it melts. The observed melting point can then be compared to known literature values to assess the purity of the compound.

Know more about phenylpropanoic acid here:

https://brainly.com/question/14407566

#SPJ11

Answer:

0.3m/s

Explanation:

Cause yupp

A man pulled a food cart 4.5 m to the right for 15 seconds. 0.3m/s is the average speed of the food cart to the nearest tenth of a m/s.

By calculating the distance an object travels in one unit by the amount of time it takes to travel that distance, one may determine the speed of the object. The speed of the item on this voyage, denoted by the letter "s," is equal to s = D/T if "D" is the distance travelled in some time "T." Average In order to comprehend the pace of a journey, speed is crucial.

During a voyage, the speed could occasionally change. Finding the median speed then becomes crucial to getting an idea of how quickly the route will be finished. You may calculate an object's speed by multiplying the distance it travels by the amount of time it takes.

Average speed = distance / time

                          = 4.5 m/  15 seconds

                         = 0.3m/s

Therefore, 0.3m/s is the average speed of the food cart to the nearest tenth of a m/s.

To know more about average speed, here:

https://brainly.com/question/10449029

#SPJ2

Answer  b

Explanation:

Answer: B. Isotopes of the same element have the same number of neutrons and a different number of protons.

Explanation: Founders Educere answer.

Good luck my fellow summer school students, I love you all.

Please rate, thanks, & vote brainliest, I want a rank up already.

Turning on a flashlight​ - Electrical Energy

What is energy conversion, using an example?

From one form to another, energy can be transformed. Examples: Our cars are filled with gasoline (chemical), which, with the aid of electrical energy from a battery, produces mechanical (kinetic) energy. Our TVs are powered by purchased electricity, which is then transformed into light and music.

1. Turning electric fan on -  Electrical Energy

2. Drying clothes -   Thermal Energy

3. Grilling barbecue - Chemical energy → Thermal energy

4. Moving a bicycle - Chemical energy → Mechanical energy

5. Lighting a candle - Chemical energy → Thermal energy or light energy

6. Music of xylophone - Sound energy → Electrical energy

7. missiles and a weapon - stored electrical energy

8. charging my phone - Electrical energy to chemical energy

9. playing a guitar - Sound energy → Electrical energy

10. turning on a flashlight​ - Electrical Energy

Learn more about energy conversion

brainly.com/question/11234965

#SPJ1

Among various physical properties, vapor pressure does not generally increase with increasing strength of intermolecular forces.

Intermolecular forces refer to the forces between molecules that hold them together. When the strength of intermolecular forces increases, physical properties such as boiling point, melting point, and viscosity typically increase. However, vapor pressure behaves differently.

Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid or solid phase at a given temperature. When intermolecular forces are stronger, it becomes harder for molecules to escape the liquid or solid phase and enter the gas phase. Therefore, fewer molecules transition to the gas phase, resulting in a lower vapor pressure.

In summary, vapor pressure does not increase with stronger intermolecular forces, but rather decreases.

Learn more about vapor pressure here:

https://brainly.com/question/29640321

#SPJ11

It is impossible to reach absolute zero because the magnitude of work that is required to remove energy from a gas in order to attain the absolute zero is so high.

The absolute zero is the temperature at which the movement of all the gas molecules is theoretically believed to cease. At the absolute zero, gas molecules remain at fixed positions because according to the third law of thermodynamics, the entropy of a perfectly ordered system is zero.

It is impossible to reach absolute zero because the magnitude of work that is required to remove energy from a gas in order to attain the absolute zero is so high such that it is impractical to attain the absolute zero.

Learn more about absolute zero:https://brainly.com/question/79835

#SPJ1

The model used for the two activities of X, driving a car in the morning and working at medical diagnosis in the afternoon, is likely a hybrid model combining supervised and unsupervised learning techniques.

Supervised learning is a machine learning technique where a model is trained using labeled data to make predictions or classify new instances. In the context of driving a car, supervised learning can be used to train a model on labeled data such as images or sensor inputs to recognize objects, detect traffic signs, or make decisions based on road conditions.

On the other hand, medical diagnosis involves analyzing patient data to identify diseases or conditions. This task often involves a combination of supervised and unsupervised learning. Supervised learning algorithms can be trained on labeled medical data to classify diseases or predict patient outcomes. Unsupervised learning techniques such as clustering or anomaly detection can be used to discover patterns, identify outliers, or group patients based on similar characteristics.

A hybrid model that combines supervised learning for specific tasks like object recognition in driving and a combination of supervised and unsupervised learning for medical diagnosis can provide a comprehensive approach to address the different requirements of each activity.

Learn more about supervised from this link:

https://brainly.com/question/29439029

#SPJ11

Answer:

The second one would be one of the application of an endothermic reaction as because endothermic reaction always have the heat in the process to mix the reactants and form the products as here in a burning wood when the wood is supplied with heat then it change into products as ashes and smoke fumes So here due to the heat is involved to form the products thats the reaction is endothermic reaction.

Hope it helps

A very reactive metal is image D

A reactive metal is a metal that readily reacts with other substances in its environment, particularly with non-metals such as oxygen, chlorine, sulfur, and nitrogen. The reactivity of a metal depends on the ease with which it can lose electrons to form positive ions.  These metals are often used in chemical reactions because of their reactivity

The metal that has been shown in the image that is attached in option D is sodium which is known to loose electron easily hence it is a reactive metal.

Learn more about reactive metal:https://brainly.com/question/20570629

#SPJ1

Answer:

744.9 mmHg ≅ 745 mmHg

Explanation:

The base to solve this, is the Ideal Gases Law. The mentioned formula is:

P . V = n . R . T

To compare two situations, we can propose:

For the first situation P₁ . V₁ = n₁. R . T₁

For the second situation P₂ . V₂ = n₂ . R . T₂

As the sample has the same moles and R is a constant value, we can avoid them so: (P₁ . V₁) / T₁ = (P₂ . V₂) / T₂

We need to make Tº unit conversion:

25ºC + 273 = 298K

We replace data → (370 mL . 1020 mmHg) / 298K = (P . 510 mL) / 300 K

(377400 mL.mmHg / 298K) . 300 K = P . 510 mL

379932.8 mL . mmHg = P . 510 mL

(379932.8 mL . mmHg) / 510 mL = P → 744.9 mmHg

Amino acids and proteins are similar to the nucleotides and nucleic acids. Just as proteins are made up of numbers of amino acids, similarly nucleic acids, which include DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), are made from monomers known as nucleotides.

Although they mainly do different functions in the cell, they do have a lot in common.

Learn more about amino acids at:

brainly.com/question/14583479

#SPJ4