rank the following in order to show the precipitation of halite from water. place the first event at the top and last event at the bottom.

Answer:

¿Las partículas de hielo tienen una alta fuerza de atracción entre partículas? Justifica tu respuesta

Explanation:

Dichos contenidos están presentes en los currículos de Física y Química de la educación básica, con independencia del marco legal, pues introducen al alumno en el conocimiento químico de la materia. Aunque la teoría cinética molecular obvia la composición atómica de las partículas, no deja de ser un contenido deseable para introducir a los alumnos en el mundo de la química pues permite diferenciar y establecer relaciones entre los niveles macro, micro y simbólico de la materia.

Answer:

The moon's surface has been struck with other objects.

Explanation:

Answer 1 - Craters are not a sign of alien life as there is nothing directly showing the crater's are not natural phenomena.

Answer 2 - Craters are (normally) produced by the impact force of a foreign object that is moving quickly and collides with an object of larger size.

Answer 3 - Volcanos form mountains and magma tubes, not craters.

Answer 4 - The formation of mountains does not relate to craters in any meaningful way.

Answer: The moon’s surface has been struck with other objects.

Explanation: because those crates were caused by drifting objects such as asteroid's and meteorite's that caused craters in the moon.

the answer is D

The new pressure would be 2 atmospheres when the gas is compressed from 500 cm³ to 250 cm³, assuming the temperature and amount of moles remain constant.

According to Boyle's Law, for a fixed amount of gas at a constant temperature, the pressure and volume are inversely proportional. Mathematically, this can be expressed as P₁V₁ = P₂V₂, where P₁ and V₁ are the initial pressure and volume, and P₂ and V₂ are the final pressure and volume, respectively.

In this case, the initial volume V₁ is 500 cm³, and the final volume V₂ is 250 cm³. The initial pressure P₁ is the standard pressure, typically defined as 1 atmosphere or 760 mmHg. We need to calculate the final pressure P₂.

Using the equation P₁V₁ = P₂V₂, we can rearrange it to solve for P₂:

P₂ = (P₁ * V₁) / V₂

Substituting the given values, we have:

P₂ = (1 atm * 500 cm³) / 250 cm³

P₂ = 2 atm

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Answer:

THE ENERGY NEEDED TO BE ADDED TO RAISE THE TEMPERATURE BY 30°C IS 145, 860 J

Explanation:

The energy needed can be calculated by using the heat formula, which is;

Heat = m c ΔT

m = mass of the hydrogen =  340 g

c = specific heat capacity of hydrogen at room temperature = 14.30 J/g°C

ΔT = change in temperature = 30°C

Heat =?

So therefore,

Heat = 340 * 14.30 * 30

Heat = 145860 J

The energy needed to be added to the hydrogen to bring the mass of 340 g to an increased temperature of 30°C is 145, 860 J or 145.86kJ

Answer:

H2S is a hydride of sulfur while SO2 is an oxide of sulfur.

Explanation:

What are these questions.

Explanation:

The weak acid will exhibit the highest percentage ionization in the solution with the highest Ka value.

To determine the highest percentage ionization, we need to compare the acid dissociation constant (Ka) values of the given weak acids. A higher Ka value indicates a higher degree of ionization in the solution. Here are the Ka values for each option:

A. HSO3⁻ (Ka = 6.3 × 10^(-8))
B. HF (Ka = 6.3 × 10^(-4))
C. H3BO3 (Ka = 5.4 × 10^(-10))
D. HC2H3O2 (Ka = 1.8 × 10^(-5))
E. H2C2O4 (Ka = 5.8 × 10^(-2))

From the given Ka values, we can see that HF (B) has the highest Ka value, which means it has the highest percentage ionization among the given aqueous solutions of weak acids.

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Answer:

False

Explanation:

Answer:

true! :) hope it helps

The electron configuration of a potassium atom at ground state is 1s²2s²2p⁶3s²3p⁶4s¹. Therefore, option D is correct.

The electron configuration of an element can be explained as electrons being occupied in different energy levels of an atom of a specific element. In the electron configuration, the electrons are usually written as a superscript of atomic subshells. For example, the electron configuration of Helium can be represented as 1s²2s².

The sequence of completely filled subshells similar to neighboring the electronic configuration of a noble gas is represented by square brackets. The principal quantum number (n) will be used to denote the maximum number of electrons in an electron shell.

The total number of electrons occupied in the given electronic configuration  1s²2s²2p⁶3s²3p⁶4s¹  is 19. The atomic number of potassium is 19 therefore it is the configuration of potassium.

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A certain first-order reaction has a rate constant of 2.55×10⁻²s⁻¹ at 25°C At 69 °C, the value of k is around 1.53 s⁻¹.

A first-order reaction is one that has a reaction rate that is linearly dependent on the concentration of just one component. In other words, a first-order reaction is a chemical reaction in which the rate of the reaction varies as a result of a change in the concentration of only one of the reactants.

k = Ae(-Ea/RT)

We can start by calculating the pre-exponential factor, A:

k = A e(-Ea/RT)

A = k / e(-Ea/RT)

At 25°C (298 K), k = 2.55×10⁻² s⁻¹. Plugging in the values for k, Ea, and T, we get:

A = (2.55×10⁻² s⁻¹ / e(-85.5 kJ/mol / (8.314 J/(mol*K) * 298 K))

A ≈ 1.43×10¹⁰ s⁻¹

Now we can use the pre-exponential factor we just calculated to find the rate constant, k, at 69°C (342 K):

k = A e(-Ea/RT)

k = (1.43×10¹⁰ s⁻¹) * e(-85.5 kJ/mol / (8.314 J/(mol*K) * 342 K))

k ≈ 1.53 s⁻¹

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Answer:

0.7μM = 0.6 μM = 0.5 μM > 0.4 μM > 0.3 μM > 0.2 μM

Explanation:

An enzyme solution is saturated when all the active sites of the enzyme molecule are full.  When an enzyme solution is saturated, the reaction is occurring at the maximum rate.

From the given information, an enzyme concentration of 1.0 μM Y can convert a maximum of 0.5 μM AB to the products A and B per second means that a 1.0 M Y solution is saturated when an AB concentration of 0.5 M or greater is present.

The addition of more substrate to a solution that contains the enzyme required  for its catalysis will generally increase the rate of the reaction. However, if the enzyme is saturated with substrate, the addition of more substrate will have no effect on the rate of reaction.

Therefore the reaction rates at substrate concentrations of 0.7μM, 0.6 μM, and 0.5 μM are equal. But the reaction rate at substrate concentrations of  0.2 μM is lower than at 0.3 μM, 0.3 μM is lower than 0.4 μM and 0.4 μM is lower than 0.5 μM, 0.6 μM and 0.7 μM.

The solutions in decreasing order of reaction rate will be:

0.7μM = 0.6 μM = 0.5 μM > 0.4 μM > 0.3 μM > 0.2 μM

It is saturated when all the active sites of the enzyme molecule are full.  When an enzyme solution is saturated, the reaction is occurring at the maximum rate.

From the given information, an enzyme concentration of 1.0 μM Y can convert a maximum of 0.5 μM AB to the products A and B per second means that a 1.0 M Y solution is saturated when an AB concentration of 0.5 M or greater is present. If the enzyme is saturated with substrate, the addition of more substrate will have no effect on the rate of reaction.

Therefore, the reaction rates at substrate concentrations of 0.7μM, 0.6 μM, and 0.5 μM are equal. But the reaction rate at substrate concentrations of  0.2 μM is lower than at 0.3 μM, 0.3 μM is lower than 0.4 μM and 0.4 μM is lower than 0.5 μM, 0.6 μM and 0.7 μM.

Thus, the solutions in decreasing order of reaction rate will be:

0.7μM = 0.6 μM = 0.5 μM > 0.4 μM > 0.3 μM > 0.2 μM

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The pH of the buffer solution is b)4.83.

To find the pH of the buffer solution, you can use the Henderson-Hasselbalch equation: pH = pKa + log([A-]/[HA]). In this case, the acid is benzoic acid (HA) and its conjugate base is sodium benzoate (A-). The pKa of benzoic acid is given as 6.30 x 10^-5.

First, calculate the ratio of [A-]/[HA] by dividing the concentration of sodium benzoate by the concentration of benzoic acid: [A-]/[HA] = 0.15/0.25 = 0.6.

Then, substitute the values into the Henderson-Hasselbalch equation: pH = 6.30 x 10^-5 + log(0.6) = 4.83.

Therefore, the pH of the buffer solution is b)4.83.

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To find out how many mL of H2SO4 are needed to reach the equivalence point, we can use the concept of stoichiometry. The balanced equation for the reaction between NaOH and H2SO4 is 2NaOH + H2SO4 -> Na2SO4 + 2H2O. From this equation, we can see that the mole ratio between NaOH and H2SO4 is 2:1.

First, we need to convert the given volume of NaOH to moles. To do this, we multiply the volume (43.7 mL) by the concentration (0.368 M) and divide by 1000 to convert mL to L. This gives us 0.01609 moles of NaOH. Since the mole ratio between NaOH and H2SO4 is 2:1, we need twice the number of moles of H2SO4 to neutralize the NaOH. Therefore, the number of moles of H2SO4 required is 2 * 0.01609 = 0.03218 moles.

Next, we can use the concentration of H2SO4 (0.806 M) to find the volume of H2SO4 needed. We divide the number of moles (0.03218) by the concentration to get the volume in liters, and then multiply by 1000 to convert it to mL. 0.03218 moles / 0.806 M = 0.03999 L = 39.99 mL So, approximately 40 mL of H2SO4 are needed to reach the equivalence point. To find the volume of H2SO4 needed to reach the equivalence point, we first convert the given volume of NaOH to moles using the concentration. Next, we use the balanced equation and the mole ratio between NaOH and H2SO4 to determine the number of moles of H2SO4 required. Finally, we use the concentration of H2SO4 to convert the moles to volume in mL. In this case, approximately 40 mL of H2SO4 are needed to reach the equivalence point.

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Answer:

bR2 since it is nonpolar

According to first law of thermodynamics, internal energy of the system for work done by the system or on the surrounding, is the sum of heat released and work done. Thus internal energy for the given system is 13155 J.

Internal energy of a system is the sum of all forms of energy in the system including its kinetic energy, potential energy, thermal energy etc.

According to first  law of thermodynamics, the heat q released by the system is :

q = u - w.

Given that heat released q = 3500 J

work done = 9655 J

internal energy u = q + w

                             = 3500 J + 9655 J

                             = 13155 J.

Therefore, the internal energy of the system  that releases 3500 j of heat and that does 9655 j of work on the surroundings is 13155 J.

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Answer:

Explanation:

This means that the atomic mass of methane is 12.011+4(1.00794)=16.04276 g/mol.

This means that in a 37.8-gram sample of methane, there would be \((37.8)\left(\frac{25.1}{100} \right)=\boxed{9.49}\) grams of hydrogen.

The frequency of the photon of light is 4.4 * 10¹⁶ Hz

Where h is Planck's constant = 6.626 * 10⁻³⁴

f is frequency

E = energy

making f subject of the formula

f = E/h

f = 2.95 × 10⁻¹⁷/6.626 * 10⁻³⁴

f = 4.4 * 10¹⁶ Hz

Therefore, the frequency of the photon of light is 4.4 * 10¹⁶ Hz

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The axon involved in the transmission of pain that is thinly myelinated and conducts the first feeling of pain that is often felt as coming on as a sharp, rapid feeling is called the A-delta fiber.

A-delta fibers are one of the two main types of sensory neurons involved in the transmission of pain signals to the brain. The other type is called C fibers, which are unmyelinated and transmit a slower, more diffuse and longer-lasting feeling of pain. A-delta fibers are responsible for the initial, sharp sensation of pain that is felt immediately after an injury.

In contrast, C fibers are responsible for the more persistent, dull, and aching sensation of pain that is felt after the initial sharp sensation has subsided. Both A-delta fibers and C fibers play important roles in the experience of pain, and both types of fibers are involved in the transmission of pain signals to the brain.

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Answer:

(Tropical) Rainforest

Explanation:

There is more biodiversity within tropical ecosystems than temperate or boreal ecosystems. Tropical rain forests have the most diversity.

Answer:

(Tropical) Rainforest

Explanation:

There is more biodiversity within tropical ecosystems than temperate or boreal ecosystems. Tropical rain forests have the most diversity.

Explanation:

The ability to speak with confidence shows the characteristic of an epic hero does this passage show. Option C is correct.

The  feeling  or emotion or belief that one or a person  can have faith in or trust on someone or for something that he or she is doing or about to do and the hero are the inspiration for the society.

In other words a feeling or emotion  of self-assurance or self believe  arising or rises  from an appreciation or motivation of one's own abilities or qualities or performance.

Therefore, ability to speak with confidence shows the characteristic of an epic hero does this passage show. Option C is correct.

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Answer:

B

Explanation:

Cuz

Answer:

Chlorine molecules are composed of two atoms (Cl2).

There are four atoms in  two molecules of chlorine as each molecule of chlorine is made up of two atoms.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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By performing the necessary calculations and comparing the Q/K ratios, we can determine whether calcite or dolomite would form first in the given water sample with [Mg2+]∼0.10 mmol/L.

To determine which mineral, calcite or dolomite, would form first in the given water sample with [Mg2+]∼0.10 mmol/L, we need to calculate the saturation index (SI) for each mineral by comparing the Q/K ratios. The mineral with the higher SI will be more likely to precipitate first.

The saturation index (SI) is calculated by comparing the ion activity product (Q) with the equilibrium constant (K) for a particular mineral. In this case, we have the equilibrium reaction: CaMg(CO3​)2​⇌Ca2++Mg2++2CO3​2−.

For calcite, the Q/K ratio can be calculated using the concentration of Ca2+ and CO3​2− ions in the water sample. Since dolomite contains both Ca2+ and Mg2+ ions, we need to consider the concentration of Mg2+ as well.

By comparing the Q/K ratios for calcite and dolomite, we can determine which mineral has a higher saturation index (SI). The mineral with the higher SI will be more likely to precipitate first.

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(C) The reaction order is zero. The activation energy is the same for both the forward and reverse reactions.

For a reaction where the activation energy is the same for both the forward and reverse reactions, it implies that the rate constants for the forward and reverse reactions are equal. The rate constant (k) is related to the reaction order (n) by the equation: k = A * [reactants]^n, where A is the pre-exponential factor and [reactants] represents the concentrations of the reactants.

If the rate constants are equal, then the reaction order (n) must be zero. This is because any value of n other than zero would result in different rate constants for the forward and reverse reactions, given that the concentrations of the reactants would be different.

Therefore, the statement (C) The reaction order is zero must be true for a reaction where the activation energy is the same for both the forward and reverse reactions.

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The 10. 00 g sample contains 7. 494 g C and 1. 260 g H. 1.25g is the mass of oxygen in gram of oxygen are in the carbohydrate sample.

A body's mass is an inherent quality. Prior to the discoveries of the atom or particle physics, it was widely considered to be tied to the amount of matter within a physical body. It was discovered that, despite having the same quantity of matter in theory, different atoms and elementary particles have varied masses. There are various conceptions of mass in contemporary physics that are theoretically different but physically equivalent.

Mass of sample = mass of carbon + mass of Hydrogen + mass of oxygen

10. 00=  7. 494 +  1. 260 + mass of oxygen

mass of oxygen= 1.25g

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Answer:

Hydrogen atoms

The vibrational modes of CO2 are the symmetric stretch, the asymmetric stretch and two bending modes.

The question has to do with a simulation of the vibrational modes of CO2 and I would summarize that as the details of the simulation are missing.

A molecule's normal modes determine its vibrations. In a vibrational spectrum, each absorption corresponds to a normal mode. The four typical carbon dioxide modes.

These modes of vibration of the compound can be observed by the use of the infra red spectroscopy as we know.

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Answer:

2H2+O2=2H2o

Explanation:

We have 2 hydrogens, 2 oxygens on the left-hand side.

But only 1 O on the right-hand side.

let's place a 2 before H2O (water)

Do you drink H2O every day?

But balancing the O unbalanced H

So the balanced chemical equation will look like this:

2H2O+O2=2H2O

Explanation:

carbon dioxide waste from the body, is a result of

cellular metabolism. Through exhalation, a body gets rid of CO2. (the lungs), are most important in removal of co2.

10) cellular transport through the lungs.

11) o2 (inhalation) lungs, oxygenate cells to deliver o2 through the bloodstream to perform proper function. plus the pulmonary arteries renew and release CO2 from the body..