when a parcel of air expands and cools, or compresses and warms, with no interchange of heat with its outside surroundings, this situation is called a(n) process. a. coalescence b. bergeron c. evaporation d. adiabatic

Answer:

Radioactive elements near the core release heat as their nuclei decay. ... Radioactive elements absorb the cold temperatures underground

Answer:

the answer is c

Explanation:

Answer:

A Chemical reaction involves changes in energy in the form of absorbtion and release of heat due to the formation and breakdown of chemical bonds. A chemical reaction is categoried as endothermic reaction in which heat energy is take in or absorbed and exothermic reaction in which energy is released.

A model can be created by following below details:

So, the decrease in temperature shows it is an endothermic reaction in which heat energy is absorbed.

Energy change in the reaction has been stored in the products and the reactants. The change in the reactant to product results in a change in energy.

According to the law of conservation of energy, energy can neither be created nor destroyed in a chemical reaction. The chemical reaction has been resulted in the energy change by the endothermic and exothermic reactions.

The project model for energy change can be:

Reactant + Energy = Products.

The ice cube has been placed in a beaker. It has been consisted of the stored potential energy. WIth the application of heat energy there has been the conversion of ice cubes to the water, and the potential energy of the ice cubes has been converted to the kinetic energy of the moving liquid particles.

Reactant = Product + Energy

The model has consisted of matching the light with a matchstick. The chemical energy of the stored matchstick has been converted to light and heat energy.

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Answer:

Let’s get back to simple physics and the laws of motion. Your car and everything in it are traveling in a given direction, to stop in requires force be applied in the opposite direction over a period of time. This occurs extremely quickly in an accident and the force is greater because the time the opposing force is acting on the vehicle is very short. The airbag system is designed to offer you protection from the violent forces exerted on you during an accident.

There are three main components to your airbag system, the bag, the inflator and the sensor. The sensor must register a collision force roughly equal to hitting a brick wall at 10 to 15 mile per hour before it will trigger the airbag inflation. Once tripped the airbag system inflates through a chemical reaction between sodium azide (NaN3) and potassium nitrate (KNO3) which creates nitrogen gas. An igniter is set off which quickly burns the chemical fuel and creates the gas needed for expansion. The bag then blows out of its storage in a split-second. Immediately after inflation, when the chemical burn is complete, the airbag begins to deflate as the gasses escape from holes in the fabric.

Explanation:

An atom loses three electrons to form ions with a +3 charge, cations have a positive charge.

Because there are fewer negatively charged electrons remaining to balance the positive charges of the protons in the nucleus, losing electrons causes atoms to gain a positive charge.

Group IIA elements lose two valence electrons to achieve the electron configuration of the noble gas that comes before them in the periodic table.

Therefore, an atom loses three electrons to form ions with a +3 charge to an atom gain a positive 3 charge.

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Answer:

Refer to the picture.

To balance the chemical equation PC15 + H2O → H3PO4 + HCl using linear algebra technique, we can set up an augmented matrix and solve the system of equations. Here's the step-by-step process:

Create a matrix or put it in vector form by assigning variables to P, Cl, H, O: Let's assign:

P = x (coefficient for PCl5)

Cl = y (coefficient for HCl)

H = z (coefficient for H3PO4)

O = w (coefficient for H2O)

The equation becomes: xPCl5 + yH2O → zH3PO4 + wHCl Set up the equation in matrix form:

| PCl5 | + | H2O | = | H3PO4 | + | HCl |

| 1 | + | 0 | = | 0 | + | 0 |

| 0 | + | 2 | = | 0 | + | 0 |

| 0 | + | 0 | = | 1 | + | -1 |

| 0 | + | 0 | = | 0 | + | 24 |

This gives us the augmented matrix form:

| 1 0 0 0 0 |

| 0 1 2 0 0 |

| 0 0 0 1 -1 |

| 0 0 0 0 24 |

Solve the system using row operations: Performing row operations to simplify the augmented matrix:

R2 = R2 - 2R1

R4 = R4 / 24

The simplified augmented matrix becomes:

| 1 0 0 0 0 |

| 0 1 0 0 0 |

| 0 0 0 1 -1 |

| 0 0 0 0 1 |

From the simplified matrix, we can assign values to the variables:

P = 0

Cl = 0

H = 0

O = 0

This implies that the coefficients for PCl5, H2O, H3PO4, and HCl are all zero. Enter the coefficients into the chemical equation: The balanced chemical equation is:

0PCl5 + 0H2O → 0H3PO4 + 0HCl

Therefore, the balanced equation is: PCl5 + H2O → H3PO4 + HCl (unbalanced)

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Answer:

i think her journey was 680 km/h long

Answer:

6.67 hours

Explanation:

(800 km) / (120 km/hr) = 6.67 hours

Answer:

The number of protons in the nucleus of the atom is equal to the atomic number (Z).

The number of electrons in a neutral atom is equal to the number of protons.

Hope it worked

Answer:

v = 10 m/s

Explanation:

Given: An object has a kinetic energy of 250 J and a mass of 5 kg

To find: Its velocity

Formula: \(KE = \frac{1}{2} mv^2\)

Solution: In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (\(\frac{1}{2}\) × m) multiplied by the velocity squared. In this case, an object with a mass of 5 kg (m = 5 kg) is moving at a velocity of 10 meters per second (v = 10 m/s), the kinetic energy is equal to 250 Joules, or (\(\frac{1}{2}\) × 5 kg) × 10 m/s².

Therefore, the velocity is v = 10 meters per second.

Answer:

A water turbine is used to convert the energy contained in water, potential energy or kinetic energy, into mechanical or electrical energy. There are two types of water turbines, the reaction water turbine, and the impulse water turbine.

Explanation:

Answer:

Water turbines are used to take energy whether it may be kinetic or potential from the water and convert that energy into mechanical, or electrical energy.

Explanation:

The formulas of the compounds that were shown are;

CaCl2

K2S

AlBr3

BeF2

MgS

Ionic compounds are a type of chemical compound made up of ions, which are atoms or molecules that have a positive or negative charge due to the gain or loss of electrons. In ionic compounds, positive ions (cations) are typically metal atoms, while negative ions (anions) are typically non-metal atoms. These ions are held together in a crystal lattice structure by strong electrostatic forces, forming a solid, crystalline substance.

Ionic compounds typically have high melting and boiling points, and they are often soluble in water. They are also typically poor conductors of electricity in the solid state, but good conductors in the melted or dissolved state due to the movement of ions.

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I'll choose Company 2 to provide my company with lye

Given

Company 1 : Theoretical yield :12,000 grams, actually  8,476 grams

Company 2 : Theoretical yield :9,000 grams, actually  7892 grams

Company 3 : Theoretical yield :7,000 grams, actually  4885 grams

Required

compare their efficiency and choose the company

Solution

To determine which company to choose, we must calculate how much percent yield each company produces. The greater the yield, the greater the efficiency. The company that has the most efficiency will be selected

% yield can be formulated :

\(\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\)

\(\tt \%yield=\dfrac{8476}{12000}\times 100\%=70.63\%\)

\(\tt \%yield=\dfrac{7892}{9000}\times 100\%=87.69\%\)

\(\tt \%yield=\dfrac{4885}{7000}\times 100\%=69.79\%\)

Company 2 has the most efficiency

It means that a person has the ability to describe, explain, and predict natural phenomena. Scientific literacy entails being able to read with understanding articles about science in the popular press and to engage in social conversation about the validity of the conclusions. Scientific literacy implies that a person can identify scientific issues underlying national and local decisions and express positions that are scientifically and technologically informed. A literate citizen should be able to evaluate the quality of scientific information on the basis of its source and the methods used to generate it. Scientific literacy also implies the capacity to pose and evaluate arguments based on evidence and to apply conclusions from such arguments appropriately.

hope this helps and sorry if this is wrong

The element's number of electrons is determined by the atomic number.

Silicon has an atomic mass of 28.09. Round it up, the whole number is 28.

The atom must have 14 neutrons AND 14 protons with a mass that adds up to 28.

So, the ones correct are:

The atom must have 14 protons, neutrons, and electrons.

(Note: This is correct if you want, like, I don't know, the appropriate standard status for Silicon.)

The "The atom must have 14 protons and electrons, but can have a different number of neutrons." is true, but please note that would make Silicon an isotope. Isotopes are atoms of the same element, but different masses. That implies it would have a different amount of neutrons. The number of protons is always the atomic number.  In other words, the protons stays the same.

This is false:

"The atom must have 14 electrons, but can have a different number of protons and neutrons." is false because if you f with the protons, it's no longer silicon. You feel me?

"The atom must have 14 neutrons." is false because the number of neutrons does not determine the atom's identity. The protons determine the identity. So Siliicon is still silicon if it has 15 neutrons, it's still Silicon. But if it had 15 protons, it's no longer Silicon. It would be the next element after it, Phosphorus.

Hope this helps! Sorry for the wait. :(

The pH of the sulfuric acid solution with a hydronium ion concentration of 0.01 M is 2.

In chemistry, the pH scale is used to measure the acidity or basicity of a solution. It ranges from 0 to 14, where a pH of 7 is considered neutral, below 7 is acidic, and above 7 is basic. The pH of a solution is determined by the concentration of hydrogen ions ([H+]) present in the solution. In the given sulfuric acid solution, the concentration of hydronium ions ([H3O+]) is 0.01 M. To calculate the pH of the solution, we can use the formula:

pH = -log[H+]

Since [H3O+] = [H+], we can substitute the given value in the formula:

pH = -log(0.01)
pH = 2

Therefore, the pH of the given sulfuric acid solution is 2.

In summary, the pH of a sulfuric acid solution with a [H3O+] of 0.01 M is 2, indicating that the solution is highly acidic.

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A neutral nucleophile such as ammonia (NH₃) can be used to make CH₃CONH₂.

To make CH₃CO₂COCH₃ from acetyl chloride (CH₃COCl), a negatively charged nucleophile such as sodium acetate (CH₃COO⁻ Na⁺) can be used. The reaction would be:

CH₃COCl + CH₃COONa → CH₃CO₂COCH₃ + NaCl

To make CH₃CONH₂ from acetyl chloride (CH₃COCl), a neutral nucleophile such as ammonia (NH₃) can be used. The reaction would be:

CH₃COCl + NH₃ → CH₃CONH₂ + HCl

A neutral nucleophile is a molecule or atom that can donate a pair of electrons to form a new covalent bond with another molecule or atom without carrying an overall positive or negative charge.

Neutral nucleophiles typically have a lone pair of electrons that they can use to form a new bond, and they do not react as readily as charged nucleophiles.

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Answer:

The limiting reagent is CuCl

Explanation:

The initial number of moles of aluminum, Al = 4.5 moles

The number of moles of copper, Cu = 6.5 moles

The given chemical reaction is presented as follows;

2Al + 3CuCl → 2AlCl₃ + 3Cu

Therefore, we have, 2 moles of aluminum combine with 3 moles of CuCl produces 2 moles of AlCl₃ and 3 moles of Cu

1 mole of Al will combine with (3/2) moles of CuCl,

Therefore, 4.5 moles of Al will combine with (4.5 × (3/2) = 6.75) 6.75 moles of CuCl

Given that the number of moles of CuCl present is only 6.5 moles which is less than the 6.75 moles required to combine with the 4.5 moles, the 6.5 moles of CuCl limits the amount of AlCl₃ and Cu produced, and therefore the CuCl is the limiting reagent.

Answer:

conduction

Explanation:

The major role in determining IE is played by effective nuclear charge and not the number of protons.

The effective nuclear charge decreases due to increasing shielding which in turn reduces the IE.

Thus the comparison of IE of Na and K is explained in option A.

What is nuclear charge?

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Complete question:

How does the pattern in ionization energy in the alkali metals explain the difference between sodium and potassium in their reaction with water?

Explain in detail.

Answer:

repulsion

Explanation:

Answer:

Explanation:

In contrast to the attractive force between two objects with opposite charges, two objects that are of like charge will repel each other. ... Similarly, a negatively charged object will exert a repulsive force upon a second negatively charged object. Objects with like charge repel each other.

The 1H NMR signal for an OH or NH proton usually does not exhibit spin-spin splitting because these protons exchange rapidly with other protons in solution.

This exchange leads to broadening of the NMR signal, making it difficult to observe spin-spin splitting. However, if the exchange rate is slowed down, spin-spin splitting may be observed.

                            Additionally, if the OH or NH proton is part of a larger molecule or functional group, the surrounding atoms and chemical environment can affect the NMR signal and potentially lead to spin-spin splitting.
The statement is true. The 1H NMR signal for an OH or NH proton typically does not exhibit spin-spin splitting due to the rapid exchange of these protons with the surrounding solvent, which effectively averages out the spin-spin interactions. This results in a broad, singlet peak for these types of protons in the NMR spectrum.

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Answer:

Some common examples of malleable metals are; gold, iron, silver, aluminium, copper, lead, etc. Sometimes, the hard metals make it harder to be deformed into thin sheets. ... Thus, argon does not show the property of malleability.

In the acid-base neutralization reaction, NaOH(aq) + H3C6H5O7(aq) → H2O(l) + Na3C6H5O7(aq), NaOH is the base.

In this reaction, NaOH is a strong base, and H3C6H5O7 (citric acid) is a weak acid. When a strong base is added to a weak acid, the base will completely react with the acid, and the resulting salt will be formed. In this case, the reaction between NaOH and H3C6H5O7 produces water and the salt Na3C6H5O7.

NaOH is a base because it donates hydroxide ions (OH-) to the solution. In this reaction, the hydroxide ions combine with the hydrogen ions (H+) from the citric acid to form water. The remaining species, Na3C6H5O7, is a salt formed from the neutralization of NaOH and H3C6H5O7.

In summary, NaOH is the base in the given acid-base neutralization reaction. It is a strong base that reacts completely with the weak acid H3C6H5O7 to produce water and the salt Na3C6H5O7. The hydroxide ions from the NaOH donate to the solution, combining with the hydrogen ions from the citric acid to form water, while the salt remains as the remaining species.

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The sensory neurons within the olfactory organ are stimulated by Chemicals in the air.

Sensory neurons are the neurons that take up the signal from the receptors to the Central Nervous system (CNS)

Olfactory organ is the organ which is capable to sense smell i.e. Olfaction.

The Chemicals present in the air stimulates the sensory neurons present withing the olfactory organ consisting of olfactory epithelium. The cilia present in the epithelium recognizes the chemical present.

The neurons form connections of neuron to the olfactory bulb.

It is a mass of tissue that is round in shape that comprises of several kinds of cells of neurons that are capable to sense smell. It is necessary to sense smell properly.

Odorants are the compound that consist of an odor which get detected by the sensory neurons to carry out olfaction. They activate olfactory receptors and send signals to olfactory bulb.

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in the classical free electron model, the neglect of electron-ion interaction is referred to as the free electron approximation. The correct option is (ii) Only.

This approximation assumes that the interaction between electrons and ions can be ignored, treating the electrons as free particles moving in a periodic potential without any significant influence from the ions. The independent electron approximation, on the other hand, assumes that the behavior of each electron can be considered independently of the others. The Drude electron-ion approximation incorporates electron-ion interactions and is not part of the classical free electron model. Therefore, the correct option is (ii) Only.

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This problem is asking for the electronegativity differences and polarity for the bonds formed between and K and F, and N and O. At the end, the results are 3.16 and ionic, and 0.40 and covalent, respectively.

In chemistry, chemical bonds are formed when elements either share or gain electrons. Once they form the bond, one can tell much of the properties of the resulting compound based on the type of bond formed.

In such a way, one can evidence de formation of covalent and ionic bonds, the former exhibited when the electronegativity difference is between 0 and about 1.6 and the former beyond 1.7.

In chemistry, electronegativity is the tendency of an atom to attract electrons in a molecule, thus, we have the following for K, F, N and O as required: 0.82, 3.98, 3.04 and 3.44, respectively.

In such a way, one can calculate the difference electronegativity for the pairs KF and NO as shown below:

K-F =3.98 - 0.82 = 3.16

N-O = 3.44 - 3.04 = 0.40

Hence, the K-F bond turns out ionic whereas the N-O, covalent.

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ANSWER

EXPLANATION

Given that

The mass of the gas is 10.0g

The volume of the gas is 7.69L

The pressure of the gas is 1.00 atm

The temperature of the gas is 27 degrees Celcius

Follow the steps below to find the molar mass of the gas

Step1; Assume the gas is an ideal gas

Step 2; Find the number of mole of the gas using the equation above

Step 3; find the molar mass of the sample

Answer:

Beryllium-8 (8Be, Be-8) is a radionuclide with 4 neutrons and 4 protons. It is an unbound resonance and nominally an isotope of beryllium. It decays into two alpha particles with a half-life on the order of 10−16 seconds; this has important ramifications in stellar nucleosynthesis as it creates a bottleneck in the creation of heavier chemical elements. The properties of 8Be have also led to speculation on the fine tuning of the Universe, and theoretical investigations on cosmological evolution had 8Be been stable.

Explanation:

Answer:

If you increase the pressure of a reaction that involves gas molecules, the equilibrium will shift towards the side with fewer gas molecules to relieve the stress of the increased pressure.

In this case, the reaction has 4 moles of gas molecules on the left side (1 mole of N2 and 3 moles of H2) and 2 moles of gas molecules on the right side (2 moles of NH3). Therefore, the equilibrium will shift towards the right to decrease the number of gas molecules and relieve the stress of the increased pressure.