Which of these compounds will dissociate to produce hydrogen ion?
Hydrochloric acid
Sodium hydroxide
Potassium hydroxide
HELP PLEASE

Answer:

elements hope this answer helps you out! :)

Answer:

Elements

Explanation:

Water = water

Carbon Dioxide = gas

The model used to calculate the effective nuclear charge (Zeff) takes into account the presence of electrons in the same shell through the concept of shielding or screening.

Shielding refers to the phenomenon where electrons in inner shells partially block the attractive force between the positively charged nucleus and the outer-shell electrons.

When an electron occupies an orbital closer to the nucleus, it experiences a stronger electrostatic attraction to the positive charge of the nucleus. However, electrons in the same shell, also known as core electrons, create a shielding effect on the outer-shell electrons.

This shielding reduces the net attractive force between the outer-shell electrons and the nucleus, effectively decreasing the effective nuclear charge experienced by those outer-shell electrons.

To calculate the effective nuclear charge (Zeff), the model takes into account the actual nuclear charge (Z) of the atom and the shielding effect caused by the inner-shell electrons. The effective nuclear charge experienced by an electron in a particular shell is given by the equation:

Zeff = Z - σ

Where Z is the actual nuclear charge (the number of protons in the nucleus) and σ represents the shielding constant or the effective charge of the inner-shell electrons.

The shielding constant takes into account the repulsion between electrons in the same shell and their shielding effect on the outer-shell electrons.

By considering the shielding effect of electrons in the same shell, the model accounts for the reduction in attractive force between the nucleus and the outer-shell electrons, providing a more accurate estimation of the effective nuclear charge experienced by those electrons.

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On converting 1.76x10²⁷ atoms of Strontium to grams we get 256020g

It is given that the number of atoms of Strontium is 1.76×10²⁷. To convert the number of atoms of Strontium to grams, the following formula is used:

Grams of Strontium= number of atoms of Strontium × Atomic Mass of Strontium/Avagadro number

We know that the atomic mass of Strontium is 87.6g. Its atomic number is 38. Then the number of grams of Strontium in 1.76x10²⁷ atoms is given by

Grams of Strontium= (1.76 x 10²⁷ x 87.6) / 6.022x10²³

                                = 154.176x10⁴/6.022

                                = 25.602 x 10⁴

                                =256020g

In this way, the conversion of atoms into grams can be done easily.

Therefore, 1.76 x 10²⁷ atoms of Strontium on conversion to grams give 256020g.

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Answer:

4

Explanation:

The percent by mass of mercury in mercuric oxide is

93 %.

The formula of mercuric oxide is HgO. When mercury combines with oxygen, then mercuric oxide is formed.

The molecular mass of mercury oxide is 216 g/mol. Its melting point is 500°C.

The balance equation for the reaction of decomposition of mercury oxide is,

\(2HgO (s)→ 2Hg (l) + O _{2}(g)\)

Mass of mercury oxide = 28.4 g

Mass of the oxygen = 2 g

The percent by mass of mercury in mercury oxide is,

\(Mass ℅= \frac{Mass \: of \: Mercury }{Mass \: of \: Mercury \: oxide} \times 100\)

\( = \frac{28.4 - 2}{28.4} \times 100\)

= 93 %

Therefore, the percent by mass of mercury in mercury oxide is 93 %.

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Following are the three guidelines to follow when considering to dispose of a material in the drain:

The material should be non hazardous, no radioactive waste and no hazardous chemical waste.

No liquid, solids, sludges, or viscous substances should be disposed in the drain

The material should not interfere with sewage treatment operations. It should not have corrosive pH levels. We should also avoid grease or oil.

It is not necessary that all the waste generated in the laboratory are hazardous. Some chemicals are safe to go in the trash or can be disposed down the sink. There are certain criteria that must be followed in order for materials to be put down the drain including low toxicity, high water solubility, and moderate PH. Only small quantities are allowed in the system at any given time and the chemicals must be degradable by the wastewater treatment.

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Answer:

1375 J/kg.°C

Explanation:

From the question First question,

Q = cm(Δt)................... Equation 1

Where Q = Heat released, c = specific heat capacity of the unknown metal, m = mass of the unknown metal, Δt = Change in temperature.

make c the subject of the equation

c = Q/mΔt.................. Equation 2

Given: Q = -5500 J (Since heat is released, Q is negative), m = 200 g = 0.2 kg, Δt = 10-30 = -20°C

Substitite these values into equation 2

c = -5500/[0.2×(-20)]

c = -5500/-4

c = 1375 J/kg.°C

Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer. The fuel can be a solid, liquid, or gas, although for airplane propulsion the fuel is usually a liquid. HoPe iT doSe WhaT EvEr U nEed IT foR hUmAn

To determine the temperature at which the KCl solution with 4.0 g of KCl and 10 mL of water precipitates, solubility data or further experimental information regarding the solubility of KCl at different temperatures would be required.

To determine the temperature at which the solution with 4.0 g of KCl (potassium chloride) and 10 mL of water (H2O) precipitates, we need more information about the solubility of KCl at different temperatures. Solubility refers to the maximum amount of solute that can dissolve in a solvent at a given temperature.

The solubility of KCl generally increases with temperature. However, without knowing the specific solubility data for KCl, it is challenging to determine the exact temperature at which precipitation occurs.

To obtain accurate solubility data, we would typically refer to solubility tables or conduct experiments to measure the solubility of KCl at different temperatures.

Assuming the KCl concentration in the given solution exceeds its solubility at a specific temperature, precipitation would occur. However, without the solubility information, we cannot determine the precise temperature.

Therefore, to determine the temperature at which the KCl solution with 4.0 g of KCl and 10 mL of water precipitates, solubility data or further experimental information regarding the solubility of KCl at different temperatures would be required.

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Yes, all of the above characteristics apply to an atomic orbital.

Atomic orbitals are defined by the wave function, which describes the probability of the electron being in a certain region of space. They are identified by a unique combination of three quantum numbers, which are the principal quantum number (n), the angular momentum number (l), and the magnetic quantum number (m).

These three quantum numbers give information about the size and shape of the orbital. Atomic orbitals are also a region around the nucleus of an atom where the probability of finding an electron is high.

In addition, they are shells in an atom containing valence electrons and can be identified by a unique combination of four quantum numbers, which are the same three quantum numbers mentioned above plus the spin quantum number (s).

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Answer:

stable

Explanation:

Given the two dot plots that represent household incomes from two subdivisions, the following are the true statements:II. Subdivision 2 has a greater median than subdivision 1.III.

Subdivision 1 has a greater interquartile range than subdivision 2.Household: A household is a group of people who reside together and share living quarters, meals, and economic resources .b: The interquartile range is a measure of variability, based on dividing a data set into quartiles. The quartiles divide the data into four equal parts, with each part containing 25 percent of the data.

To solve the problem, we will need to find the mean, median, interquartile range, and standard deviation for the two subdivisions. The following is the summary of the calculations:Subdivision 1:Mean: $44,700Median: $42,600Interquartile range: $22,100Standard deviation: $12,180Subdivision 2:Mean: $38,600Median: $42,100Interquartile range: $16,400Standard deviation: $9,480From the calculations, the statements that are true are:II. Subdivision 2 has a greater median than subdivision 1.III. Subdivision 1 has a greater interquartile range than subdivision 2.The correct option is option B (II & III).

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Answer:

GOLDEN TRICK

Explanation:

GO TO ND ASK.

MARK 5 STAR FOR THIS BRILLIANT ADVICE.

1. Atomic number is the relative atomic in an atom.

2. Mass number is the number of protons and neutrons in an atom

3. Isotopes are atoms with the atomic same but different mass due to the neutrons number of neutrons in the nucleus.

Atoms of many elements are in the form of molecules or ions because they are the most reactive. Examples are hydrogen oxygen chlorine and other elements. However non-reactive atoms of certain elements exist in nature in a free state. The relative atomic mass of an element is defined as the weight in grams of the number of atoms of that element in 12.00 grams of carbon-12.

The atomic mass of an element is the average mass of the atoms of the element measured in atomic mass units AMU, also known as Dalton D. Atomic mass is the weighted average of all isotopes of that element, the mass of each isotope multiplied by the abundance of that particular isotope. It is the ratio of the average atomic mass of the element from a single specific sample or source to the mass of the carbon-12 atom.

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The complete sentences are:

Page 3:

The effect of energy in phase transitions of matter is that it is required to break the intermolecular forces that hold the particles of a substance together. When energy is added to a substance, the particles move faster and the intermolecular forces are broken. This can cause the substance to change phase.

The interactive demonstration on the sample of water shows that energy is required to melt ice and boil water. When the ice is heated, the particles start to move faster and the ice melts. The temperature of the water stays constant at 0°C until all of the ice has melted. This is because the energy is being used to break the intermolecular forces in the ice. Once all of the ice has melted, the temperature of the water starts to rise again. When the water is boiled, the particles move so fast that they escape from the liquid state and become a gas. The temperature of the water stays constant at 100°C until all of the water has boiled. This is because the energy is being used to break the intermolecular forces in the water. Once all of the water has boiled, the temperature of the steam starts to rise again.

The complete sentences:

Page 4:

Heating curves show the temperature of a substance as it is heated. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.

Cooling curves show the temperature of a substance as it is cooled. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.

Both curves show that the temperature of a substance increases as it is heated and decreases as it is cooled.

A heating curve is more choppy than a cooling curve because there are more phase changes during heating than during cooling.

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Answer:

28atm

Explanation:

Using Gay lussac's law equation as follows:

P1/T1 = P2/T2

Where;

P1 = initial pressure (atm)

T1 = initial temperature (K)

P2 = final pressure (atm)

T2 = final temperature (K)

Based on the information provided in this question;

P1 = 30.0 atm, T1 = 30.0°C, P2 = ?, T2 = 10.0°C

NOTE: Absolute temperature i.e. Kelvin is required for this law

T1 = 30°C + 273K = 303K

T2 = 10°C + 273K = 283K

Using P1/T1 = P2/T2

30/303 = P2/283

Cross multiply

P2 × 303 = 30 × 283

303P2 = 8490

P2 = 8490/303

P2 = 28.02

New pressure of the gas = 28atm

Fire. It's all fun and games until someone ignores the Bunsen burner! ...

Heat Burns. Handling hot items hastily without the proper tools can result in serious burns. ...

Chemical Burns. ...

Cuts and Scrapes. ...

Contamination. ...

Inhalation. ...

Spills and Breaks.

Lithium, as a stronger ion-dipole interaction results from a smaller atomic radius.

The number of miles from a nuclear charge to its outermost electron orbital is typically defined as the atomic radius. Only by determining the separation seen between nuclei of two contacting molecules and halving a certain distance can one determine the dimension of an atom.

The type of chemical bond that the atoms are engaged in determines the value of their atomic radii (metallic, ionic, or covalent bond). A portion of the observable distance separating atoms is attributed to one type of atom and the remainder to another type when the neighboring atoms are not identical, as in sodium chloride.

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The total mass of 4 tin is in grams is 580 grams and in kg is 0.58kg.

One tin of chopped tomatoes weight is 145 grams

and we have to calculate it for 4

so for 4

145*4 =580 grams

and we have to change it into kilograms so

580 /1000  = .58kg

By 1,000, divide the number of grams.

To convert from grams to kilograms, simply divide by 1,000 because there are 1,000 grams in every kilogram. If necessary, construct the equation using fractions. Put the number of grams over 1 and divide it by the conversion factor, which is 1 kg / 1,000 g. Your answer in kilograms will result from the cancellation of the grams. Remember to use the appropriate units to mark your response.

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Physical components and the chain of cause and effect to explain how something works is known as a Mechanistic explanation.

Mechanistic’ is derived from ‘mechanism’ (and not ‘mechanics’). A mechanism is a complex entity that generates certain phenomena, after receiving some input. Mechanistic explanations aim at opening the black boxes of mechanisms and at understanding how the different parts work together. Complexity means, for example, the existence of multiple levels, and mutual relationships between parts and whole. That is why another term for ‘mechanistic explanation’ is ‘constitutive explanation’:

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The molar solubility of silver arsenate in pure water at 25°C is:

S = (1.0 x 10^-22 / [AsO4^3-])^(1/3)

The molar solubility of silver arsenate in 0.10 M AgNO3 is:

S = 4.22 x 10^-7 M

(a) Molar solubility of silver arsenate in pure water at 25°C can be calculated using the solubility product constant Kp and the expression:

Ag3AsO4(s) = Ag+ (aq) + AsO4^3- (aq)

Kp = [Ag+]^3 [AsO4^3-]

Rearranging, we have:

[Ag+]^3 = Kp / [AsO4^3-]

Taking the cube root of both sides:

[Ag+] = (Kp / [AsO4^3-])^(1/3)

Since Kp = 1.0 x 10^-22, we have:

[Ag+] = (1.0 x 10^-22 / [AsO4^3-])^(1/3)

Since the molar solubility is equal to the concentration of Ag+ ions, the molar solubility of silver arsenate in pure water at 25°C is:

S = (1.0 x 10^-22 / [AsO4^3-])^(1/3)

(b) To calculate the molar solubility of silver arsenate in 0.10 M AgNO3, we need to use the common ion effect. The presence of AgNO3 will increase the concentration of Ag+ ions in the solution and thus decrease the solubility of silver arsenate.

The solubility product constant equation can be written as:

Kp = [Ag+]^3 [AsO4^3-] = S^3 * [AsO4^3-]

Rearranging, we have:

S^3 = Kp / [AsO4^3-]

Since Kp = 1.0 x 10^-22 and [AsO4^3-] = S, we have:

S^3 = 1.0 x 10^-22 / S

S^4 = 1.0 x 10^-22

S = (1.0 x 10^-22)^(1/4) = 7.07 x 10^-6 M

However, this is the solubility in pure water. In 0.10 M AgNO3, the concentration of Ag+ ions is 0.10 M. So, we need to use the equation:

Ksp = [Ag+]^3 [AsO4^3-] = (0.10 + S)^3 S

Rearranging, we have:

S^3 = Ksp / (0.10 + S)^3

Substituting Ksp = 1.0 x 10^-22, we have:

S^3 = 1.0 x 10^-22 / (0.10 + S)^3

Solving for S, we obtain the molar solubility of silver arsenate in 0.10 M AgNO3 as:

S = 4.22 x 10^-7 M

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During the oxidative phosphorylation of cellular respiration, hydrogen can be considered as a reducing agent because it loses electrons while molecular oxygen is an oxidizing agent because it accepts electrons.

Reducing and oxidizing agents are different molecules that accept and donate electrons in chemical redox reactions such as oxygen which accept and hydrogen which donates.

Therefore, with this data, we can see that reducing and oxidizing agents are related and they work together to move electrons in different redox reactions such as occur during cellular respiration.

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Answer:

NA

Explanation:

the other three options are alkali earth metals like magnesium (they are all in group 2). Sodium is the only one that is not an alkali earth metal.

The \(Na\) element would be the least similar to magnesium (\(Mg\) ).

The electron/electrons present in valence shell is called valence electrons.

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Answer:

According to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas? The motion of the gas particles is random and in a straight-line.

Explanation:

Answer:

180g

Explanation:

El soluto y el solvente son los componentes químicos que se mezclan en una solución. El soluto es una sustancia química, la cual puede poseer diferentes estados de agregación (es decir, sólido, líquido o gaseoso), que se se disuelve en un solvente; mientras que el solvente es una sustancia en estado líquído en la cual se diluye el soluto, formando una solución. La solubilidad de una sustancia química se define como la proporción en que una cantidad determinada soluto puede disolverse en una determinada cantidad de un solvente, a una temperatura específica. En este caso, 240 gramos (g) corresponde al 100% del contenido total de la solución, con lo cual la cantidad de solvente (agua) de una solución al 25% correspondería a la siguiente fórmula:

X = (75 x 240g) / 100

X = 180g

We all come across archetypes, which are recurring patterns, images, or feelings. Because archetypes do not physically manifest themselves, they appear to be more intellectual than physical.

It's similar to the account of God appearing to Moses, but only allowing Moses to view a portion of him since "no one may see me and survive" . They do, however, appear as "archetypal images" and recurring themes in consciousness. They act as influences that combine psychic materials into recognizable visuals. For instance, the stereotype of the Wicked Stepmother — You know what she looks like, at least to you, even if I haven't given a description.  That mental picture you have is an archetypal picture. Even though I'm not making any specific suggestions, you can comprehend not only how she looks but also her psychic impact.

Even if you have never had a stepmother, the wicked stepmother in Cinderella resonates because of the Wicked Stepmother archetype.

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Answer:

It is a Physical change.

Explanation:

To summarize, making popcorn results in major changes to the physical shape, and the release of water, but there is no major change in chemical composition. It is no secret how to get the most popped corn from your kernels; you need just the right amount of water in the endosperm and a robust pericarp.

We can see that popping popcorn is a physical change rather than a chemical change.

A physical change involves a change in the physical properties of a substance without altering its chemical composition or identity. In the case of popping popcorn, the process involves the conversion of the hard kernel into a light and fluffy popcorn, but there is no alteration in the chemical composition of the popcorn itself.

The chemical structure of the starches and other components in the popcorn remains the same before and after popping.

A chemical change, also known as a chemical reaction, refers to a process in which one or more substances undergo a transformation, resulting in the formation of new substances with different chemical properties.

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Answer:

34.9103 or 34.9 g

Explanation:

Remember Density is a broken heart: m/v.

In this scenario (Let x = # of grams in the sample of gasoline),

D = 0.7198 g/mL = x g / 48.5 mL

So,

(0.7198 g/mL) * (48.5 mL) = x g

x g = 34.9103 = 34.9 g (Accounting for Significant Figures)

The formation of tropospheric ozone in photochemical smog involves a series of chemical reactions primarily driven by sunlight.

Here is a simplified representation of the reactions:
Nitrogen Dioxide (NO2) reacts with sunlight (UV radiation) to produce Nitric Oxide (NO) and an Oxygen atom (O).
NO2 + UV radiation → NO + O
Nitric Oxide (NO) reacts with Oxygen molecules (O2) to form Nitrogen Dioxide (NO2) again.
NO + O2 → NO2
The Oxygen atom (O) produced in reaction 1 reacts with an Oxygen molecule (O2) to form Ozone (O3)
.O + O2 → O3Ozone (O3) can react with Nitric Oxide (NO) to form Nitrogen Dioxide (NO2) and Oxygen (O2).
O3 + NO → NO2 + O2
These reactions are part of a complex set of photochemical reactions involving various pollutants such as nitrogen oxides (NOx), volatile organic compounds (VOCs), and sunlight. The primary precursors for tropospheric ozone formation in photochemical smog are Nitrogen Dioxide (NO2) and volatile organic compounds (VOCs). The reactions outlined above represent a simplified version of the process and do not capture the full complexity of atmospheric chemistry involved in the formation of tropospheric ozone.

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The last third-party candidate to win one or more states was George Wallace of the American Independent Party in 1968.

Who was George Wallace?

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