This reaction would be spontaneous in the forward direction at temperatures less than __________. Give your answer in degrees Kelvin to 1 decimal place.

Answer:

1183680 seconds

Explanation:

The equilibrium constant expression for the decomposition of ammonium hydrogen sulfide can be written as follows:

Kc = [NH3][H2S]/[NH4HS]

where [NH3] represents the concentration of ammonia in moles per liter (mol/L), [H2S] represents the concentration of hydrogen sulfide in mol/L, and [NH4HS] represents the concentration of ammonium hydrogen sulfide in mol/L at equilibrium.

The equilibrium constant expression describes the ratio of the concentrations of the products to the concentration of the reactant at equilibrium. A larger value of Kc indicates that the products are favored at equilibrium, while a smaller value indicates that the reactant is favored.

In the case of the decomposition of NH4HS, if the value of Kc is greater than 1, it indicates that the forward reaction (decomposition of NH4HS to NH3 and H2S) is favored at equilibrium, and if Kc is less than 1, it indicates that the reverse reaction (formation of NH4HS from NH3 and H2S) is favored at equilibrium. If Kc is equal to 1, it indicates that the forward and reverse reactions are occurring at equal rates and the system is at equilibrium.

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Answer:

It is illegal

Explanation:

Fracking involves drilling deep into the earth crust in which a water mixture with high pressure is directed at the rock with the purpose of releasing the gas inside. This process is common in the exploration of natural gas and other hydrocarbons.

It is however illegal because the water are mostly contaminated due to the hydrocarbons present and harmful to life. It is advisable and the best to remove the water and recycle them in treatment plants

Answer:

Explanation:o

Answer:

\(\boxed {\boxed {\sf 447,560 \ Joules}}\)

Explanation:

We are asked to find the energy required to melt 1340 grams of ice. We are given this formula:

\(Q=mL\)

In this formula, Q is the heat, m is the mass, and L is the latent heat.

For this problem, the mass is 1340 grams of ice. Since we want to melt the ice, we need the latent heat of fusion (melting) which is 334 Joules per gram.

\(m= 1340 \ g \\L= 334 \ J/g\)

Substitute the values into the formula.

\(Q= (1340 \ g )( 334 \ J/g)\)

Multiply. The grams will cancel each other out.

\(Q=1340 *334 \ J \\Q=447560 \ J\)

447,560 Joules of energy are needed to melt 1340 grams of ice.

The solution would contain 0.0084 mols of ions if 1.38 grams of sodium phosphate were dissolved in 50 mL of water.

In the International System of Units, the mole (symbol mol) is the unit of substance amount. The amount of substance is a measurement of how many elementary entities of a given substance are present in an object or sample. The mole is defined as having 6.022140761023 elementary entities. The mole concept is an easy way to express the amount of a substance. Any measurement is divided into two parts: the numerical magnitude and the units in which the magnitude is expressed. Due to the small size of atoms and molecules, the mole concept allows us to count atoms and molecules by weighing macroscopically small amounts of matter.

Here,

given mass=1.38 gram

molar mass,

=23*3+31*1+16*4

=69+31+64

=164 grams

moles=given mass/molar mass

=1.38/164

=0.0084 moles

If 1.38 grams of sodium phosphate were dissolved in 50 mL of water, the solution would contain 0.0084 mols of ions.

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The third law of thermodynamics describes the entropy of a: solid.

The third law of thermodynamics states that the entropy of a pure crystalline substance approaches zero as the temperature approaches absolute zero (0 Kelvin or -273.15 degrees Celsius). This law implies that at absolute zero, a perfectly ordered and pure crystalline solid will have zero entropy.

The third law of thermodynamics is not specific to liquids or gases but applies to solids. In a solid, the molecules are highly ordered and have fixed positions in a regular lattice structure. As the temperature decreases towards absolute zero, the thermal motion of the molecules reduces, and the system becomes more ordered, resulting in a decrease in entropy.

In contrast, liquids and gases have higher entropy compared to solids at absolute zero because their molecules have more freedom of movement and are not as tightly arranged. Therefore, the third law of thermodynamics specifically addresses the entropy of solids and does not apply to liquids or gases.

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Answer:

14.212 x 10^23 atoms

Explanation:

Xenon is a noble gas and is MONOTOMIC so

EACH mole is an Avagadro's Number of atoms

   2.36 * 6.022 x 10^23   atoms =

Answer:

A cation is a positive ion

Explanation:

A cation is a positively charged ion with fewer electrons than protons while an anion is negatively charged with more electrons than protons, because of their opposite electric charges; cations and anions attract each other and readily form ionic compounds.

From the  highest to lowest Ionization Energies for beryllium, calcium, magnesium, and strontium, the order is:  Be > Mg > Ca > Sr

Ionization energy is defined as a measure of the difficulty in removing an electron from an atom or ion or the tendency of an atom or ion to give off an electron.

Now, ionization energy usually decreases as it descends in a group.  Thus, from the  highest to lowest for beryllium, calcium, magnesium, and strontium, the order is determined as:

Be > Mg > Ca > Sr

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Answer: B (BE > MG > CA > SR)

Explanation: ON EDGE

Answer:

specialized if you add one more I cause I'm pretty sure there is supposed to be one more i.

Answer:

(Ge)

Explanation:

I'm just taking a wild guess really!

Answer:

50

Explanation:

Answer:

C. Chemical energy - Electrical energy - Sound energy

Explanation:

According to the law of conservation of energy, energy can be transformed i.e changed from one form to another. According to this question, a student builds an electrical circuit, which connects a battery to a siren. Based on this description, the electrical circuit uses ELECTRICAL ENERGY supplied by the CHEMICAL ENERGY in the battery cell.

The electrical energy in the circuit connects the CHEMICAL ENERGY in the battery to the siren, which makes the sound using SOUND ENERGY. In other words, the CHEMICAL ENERGY of the battery powers the ELECTRICAL ENERGY of the circuit to make SOUND ENERGY in the siren. Hence, the order of energy transformation is: Chemical energy - Electrical energy - Sound energy

Answer:

C. Chemical energy - Electrical energy - Sound energy

Explanation: I took the test:)

The IUPAC name of the given compound is 4-methylene-1,7-heptadiene

Organic chemistry is the chemistry of carbon together with other elements such as oxygen, nitrogen, sulfur, hydrogen and phosphorus.

Organic compounds forms the core of organic chemistry.

In naming organic compounds, the IUPAC nomenclature is used.

The IUPAC name of the given compound is 4-methylene-1,7-heptadiene.

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A solution is a homogeneous mixture that consists of a solute dissolved in a solvent, and table salt and water can be classified as a solution.

This is because table salt, which is the solute, dissolves completely in water, which is the solvent, to form a homogeneous mixture. The dissolved particles in the resulting solution are so small that they cannot be seen. The dissolved solute particles in the solution are evenly dispersed throughout the solvent particles. This results in the formation of a homogeneous mixture that has the same composition throughout.

A solvent is typically the component in a solution that is present in the largest amount, while a solute is the substance that dissolves in the solvent. Table salt and water are examples of a homogeneous mixture because the salt molecules are evenly dispersed throughout the water molecules to form a single, uniform phase. This means that table salt and water form a solution, which is a type of homogeneous mixture.

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At the equivalence point, the molarities of the two solutions are equal, so the volume of the NaOH required to neutralize the HCl is also 40.0 mL, for the titration.

The concentration of HCl multiplied by the volume of HCl must be equal to the concentration of NaOH multiplied by the volume of NaOH. The concentration of the HCl is 0.120 moles/L and the volume of the sample is 40.0 mL. This means that the concentration of NaOH multiplied by the volume of NaOH must equal 0.120 x 40.0 = 4.8 moles. The concentration of NaOH is also 0.120 moles/L, so the volume of NaOH must be 4.8/0.120 = 40.0 mL. This means that 40.0 mL of 0.120 m NaOH is needed at the equivalence point of the titration to neutralize a 40.0 mL sample of 0.120 m HCl.  To determine the volume of 0.120 m NaOH needed at the equivalence point of a titration, the moles of HCl and NaOH must be equal. This means that the concentration of HCl multiplied by the volume of HCl must be equal to the concentration of NaOH multiplied

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This energy released is enough to produce glucose-1-phosphate and expose a free glycogen chain end. It is an exergonic reaction that is energetically favorable, as the ΔG°′ is -3.1 kJ/mol. It is an exergonic reaction that is energetically favorable, as the ΔG°′ is -3.1 kJ/mol. glycogen phosphorylase catalyzes the reaction that breaks down glycogen by releasing energy for use by the cell.

The glycogen phosphorylase reaction (ΔG ∘′ = 3.1 kJ⋅mol −1) is exergonic in the cell due to the hydrolysis of the glycosidic bond connecting the glucose monomers. What is the glycogen phosphorylase reaction Glycogen phosphorylase is an enzyme that breaks down glycogen in the presence of Pi and releases glucose-1-phosphate via phosphorylases. In the cell, glycogen phosphorylase catalyzes the exergonic (favorable) degradation of glycogen through hydrolysis of the glycosidic bond connecting the glucose monomers. During glycogen degradation, the bond connecting the glucose monomers is broken by the hydrolysis of a phosphate ester. The hydrolysis of a phosphate ester releases energy due to the bond's high-energy nature.

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Answer:

\(\boxed {\boxed {\sf A. \ Nickel}}\)

Explanation:

First, we must find the density of the unknown metal.

Density is found by dividing the mass by the volume.

\(d=\frac{m}{v}\)

The mass of the metal is 89 grams and the density is 10 cubic centimeters.

\(m= 89 \ g \\d= 10 \ cm^3\)

Substitute the values into the formula.

\(d=\frac{89 \ g}{10 \ cm^3}\)

Divide.

\(d= 8.9 \ g/cm^3\)

Now we know the density and can identify the unknown metal.

The density matches nickel's density. Therefore, this metal must be nickel.

The solubility of oxygen at 10m depth below sea level, 25 degrees Celsius, and 30 g/L salinity is approximately 6.59 mg/L.

To calculate the solubility of oxygen at a specific depth below sea level, temperature, and salinity, we can refer to the oxygen solubility tables. The solubility of oxygen can vary depending on these factors.

1. Begin by identifying the given parameters:
  - Depth: 10m below sea level
  - Temperature: 25 degrees Celsius
  - Salinity: 30 g/L

2. Use the given parameters to locate the corresponding values in the oxygen solubility table.

3. The solubility of oxygen at a depth of 10m below sea level, 25 degrees Celsius, and 30 g/L salinity is typically around 6.59 mg/L.

Therefore, the solubility of oxygen at 10m depth below sea level, 25 degrees Celsius, and 30 g/L salinity is approximately 6.59 mg/L.

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The oxygen solubility at 10m depth below sea level, 25°C, and 30 g/L salinity is approximately 1538 mol/L.

To calculate the oxygen solubility at a specific depth below sea level, temperature, and salinity, we can use the solubility formula.

The solubility of a gas decreases with increasing temperature and salinity, and increases with increasing pressure.

Here's how you can calculate the oxygen solubility at 10m depth below sea level, 25°C, and 30 g/L salinity:

1. Determine the pressure at 10m depth below sea level: -

The pressure at sea level is approximately 1 atmosphere (atm).

The pressure increases by approximately 1 atm for every 10 meters of depth.

Therefore, at 10m depth, the pressure is approximately 2 atm.

2. Convert the temperature to Kelvin: -

To convert from Celsius to Kelvin, add 273 to the temperature.

25°C + 273 = 298 K.

3. Use the solubility formula:

The solubility of oxygen in water can be calculated using Henry's law:

S = k * P * C.

S is the solubility of oxygen in moles per liter (mol/L).

k is the Henry's law constant for oxygen in water at a specific temperature and salinity.  

P is the partial pressure of oxygen in atmospheres (atm).

C is the concentration of oxygen in moles per liter (mol/L).

4. Look up the Henry's law constant for oxygen at 25°C and 30 g/L salinity:

The Henry's law constant for oxygen at 25°C and 30 g/L salinity is approximately 769 L*atm/mol.

5. Calculate the solubility:  

S = (769 L*atm/mol) * (2 atm) * (1 mol/L). - S ≈ 1538 mol/L.

Therefore, the oxygen solubility at 10m depth below sea level, 25°C, and 30 g/L salinity is approximately 1538 mol/L.

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From 1985 to 2014, the general trend in the size of the area with pH levels less than or equal to 4.5 (indicating acidic environment) showed an increase. This trend suggests that over this time period, the acidic areas expanded or became more prevalent.

Several factors contribute to this trend. One major factor is human activities, particularly the burning of fossil fuels and industrial emissions. These activities release pollutants such as sulfur dioxide and nitrogen oxides into the atmosphere, which can then react with water and form acids, leading to acid rain. Acid rain can contribute to the acidification of soil and water bodies, leading to a decrease in pH levels.

Another contributing factor is deforestation. When forests are cleared, the soil is exposed to rainfall, which can lead to increased leaching of acidic compounds into the soil and water systems. Additionally, without the buffering capacity of trees, the pH of the soil can become more susceptible to fluctuations.

Climate change can also impact pH levels. Rising temperatures can affect the carbon dioxide levels in the atmosphere, leading to increased absorption of CO2 by the oceans. This can result in ocean acidification, where the pH of seawater decreases, negatively impacting marine life.

It is important to note that the trend may vary in different regions due to specific local factors and mitigation efforts. However, overall, the general trend from 1985 to 2014 indicates an increase in the size of areas with pH levels less than or equal to 4.5, signaling a growing concern for acidic environments.

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The density of gold in SI units is 19,000 kg/m³. Gold's relative density of 19 means that it is 19 times denser than water at 4°C, which has a density of 1000 kg/m³. Therefore, by multiplying the relative density of gold by the density of water, we can find the density of gold in SI units. In this case, 19 multiplied by 1000 kg/m³ equals 19,000 kg/m³, which is the density of gold in SI units.

In the context of this problem, the relative density of a substance is defined as the ratio of its density to the density of a reference substance, in this case, water at 4°C. By multiplying the relative density by the density of the reference substance, we can calculate the density of the substance in SI units.

In this example, the relative density of gold is 19, indicating that gold is 19 times denser than water at 4°C. Multiplying the relative density by the density of water (1000 kg/m³) yields the density of gold as 19,000 kg/m³ in SI units.

To summarize, the density of gold in SI units is 19,000 kg/m³. The relative density of gold is 19, indicating that it is 19 times denser than water at 4°C, which has a density of 1000 kg/m³.

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The sentence that shows a MAIN problem facing Earth's water supply is "We are experiencing the fastest rate of glacial retreat in recorded history."

This sentence highlights the alarming rate at which glaciers, which are a significant source of Earth's freshwater, are melting. The melting of glaciers not only leads to a loss of freshwater but also contributes to rising sea levels, which can have devastating effects on coastal communities. This problem is compounded by the fact that most of Earth's freshwater is locked in glaciers, making it difficult to access and distribute. Additionally, as climate change continues to worsen, the distribution and availability of Earth's water supply may become even more uneven, leading to further challenges in managing this valuable resource. Therefore, it is crucial that we take steps to address the issue of glacial retreat and ensure the sustainability of Earth's water supply for future generations.

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complete question :

Which sentence from the article shows a MAIN problem facing Earth's water supply?

A Most of Earth's freshwater is ice, locked in massive glaciers, ice sheets and ice caps.

B Water vapor is not evenly distributed across the atmosphere.

с Residence time for water in the Antarctic ice sheet is about 17,000 years.

D We are experiencing the fastest rate of glacial retreat in recorded history,

Answer:

crystal structure is a description of the ordered arrangement of atoms, ions or molecules in a crystalline material

That looks like K12 lol

To determine the pressure of the ammonia gas at a new volume and temperature, we can use the combined gas law, which states that the ratio of the initial pressure, volume, and temperature is equal to the ratio of the final pressure, volume, and temperature.

Using the combined gas law equation: (P1 * V1) / T1 = (P2 * V2) / T2

Given:

P1 = 585 torr (initial pressure)

V1 = 20.0 ml (initial volume)

T1 = 20.0 °C + 273.15 = 293.15 K (initial temperature)

V2 = 50.0 ml (final volume)

T2 = 50.0 °C + 273.15 = 323.15 K (final temperature)

We need to solve for P2 (final pressure).

Rearranging the equation, we have:

P2 = (P1 * V1 * T2) / (V2 * T1)

Substituting the given values into the equation:

P2 = (585 torr * 20.0 ml * 323.15 K) / (50.0 ml * 293.15 K)

Calculating this expression gives us the final pressure (P2) of the ammonia gas at the new volume and temperature.

In summary, using the combined gas law equation, we can determine the pressure of the ammonia gas at a new volume and temperature. By substituting the given values into the equation and performing the calculation, we can find the final pressure of the gas.

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To disinfect the dialysis station, you should mix a solution of 1:100 dilution of sodium hypochlorite (bleach) with water.

1. Gather the necessary supplies: sodium hypochlorite (bleach) and water.
2. Determine the desired volume of disinfectant solution needed to thoroughly clean the dialysis station.
3. Measure out the appropriate amount of bleach by dividing the desired volume by 100 (e.g., if you need 1000 mL of solution, use 10 mL of bleach).
4. Add the measured bleach to the remaining volume of water needed to reach the desired total volume (e.g., 990 mL of water in the example above).
5. Mix the bleach and water thoroughly to create a 1:100 bleach solution.
6. Use this solution to disinfect the dialysis station, following your facility's protocol and ensuring all surfaces are cleaned properly.

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Answer:

Well, in order for a substance to be soluble, it needs to be able to be dissolved, especially in water.