Which of these is a disadvantage of using natural gas A It is not considered safe to use in homes. B Scientists have developed new ways of extracting it C It burns less cleanly than other fossil fuels D Extraction through fracking can contaminate groundwater

The arrangement of the ions in order of decreasing ionic radii is;

\(S^{2-}\) > \(P^{3-}\) > \(Cl^{-}\) > \(K^+\) > \(Sc^{3+}\)

We know that the ionic radii has to do with the distance that is measured between the nucleus of the ion up to the outermost electron that can be found inside the ion. This tells us a lot about the way that the ion behaves.

Let us have at the back of our minds that the ionic radius and the atomic radius are two things that are very much connected as we discuss the properties of the elements. Both the ionic radius and the atomic radius does increase down the group but decrease across the period.

We now have a series of ions and the position of the ions in the periodic table is going to determine hw they would be ranked in order of decreasing ionic radii.

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The high-density brine drains into the water beneath the ice and in the process, the sea ice freshens while the salinity of the underlying water decreases, becoming less dense (Option C).

Sea ice is usually less salty than the ocean water it freezes from. During the process of ice formation, salt in the ocean water is expelled from the ice as it grows; most of the salt is ejected into the ocean but some remain trapped inside pockets of brine within the ice. When the air temperature falls below the freezing point of seawater (usually around -1.8 °C), water molecules start to form ice crystals, which grow and aggregate into a solid sheet of ice.

During this process, the salt rejected by the growing ice also accumulates, causing the salinity of the remaining brine to increase. Some of the brine is encapsulated within ice crystals, but most are trapped in the spaces between neighboring crystals.

Thus, the correct option is C.

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Answer:

Your answer is attached DAME!!!

Ranking from highest to lowest boiling point are as Highest BP: C36H78, 2nd highest: C17H36, 3rd highest: C5H12, Lowest BP: C2H6, 2nd lowest: C5H12.

Here is the series, heptadecane, C17 H36 > paraffin, C36H74 > 2,2-dimethylpropane; C,H12 > ethane, C2H6 > pentane, C5H12

The boiling point of a substance is the temperature at which its vapor pressure is equal to the pressure surrounding it, causing it to change from a liquid to a gas. Different substances have different boiling points, which can be affected by factors such as pressure and impurities. The boiling point of water, for example, is 100 degrees Celsius (212 degrees Fahrenheit) at sea level, while other substances such as helium and hydrogen have much lower boiling points.

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This can be especially problematic when working with small quantities of product, where even small losses can significantly affect the final yield.Therefore, while performing acid-base extractions, it is important to be careful during vacuum filtration to minimize product loss and maximize yield.

Vacuum filtration can cause product loss of acid-base extraction due to the loss of the desired product in the filter paper or during the transfer process.What is vacuum filtration?Vacuum filtration is a technique used in laboratory settings to separate solid and liquid components of a mixture. The process involves using suction to pull a liquid through a filter that separates the solid from the liquid. This method is preferred over gravity filtration because it is much faster and can process larger quantities of material in a shorter amount of time.How does vacuum filtration cause product loss of acid-base extraction?In acid-base extraction, the desired product is often extracted into the organic phase, which is then subjected to vacuum filtration. Vacuum filtration can cause product loss of acid-base extraction due to the loss of the desired product in the filter paper or during the transfer process. The vacuum force applied during filtration can cause the product to adhere to the filter paper or other surfaces, resulting in a loss of yield. This can be especially problematic when working with small quantities of product, where even small losses can significantly affect the final yield.Therefore, while performing acid-base extractions, it is important to be careful during vacuum filtration to minimize product loss and maximize yield.

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The equilibrium would lie to the right for the following reaction: H_{3}PO_{4} + NH_{3} \rightleftharpoons NH_{4}^{+} + H_{2}PO_{4}^{-}. This is because the reactants, H_{3}PO_{4} and NH_{3}, are stronger acids and bases than the products, NH_{4}^{+} and H_{2}PO_{4}^{-}. The pK_{a} values for the reactants are 2.2 and 33, respectively, while the pK_{a} values for the products are 9.8 and 7.2, respectively. Since the pK_{a} values for the reactants are lower, they are stronger acids and bases and the reaction will favor the formation of the weaker acids and bases, which are the products. Therefore, the correct answer is option c. To the right because the reactants are stronger acids and bases

The acid and base strength can be quantified using the acid dissociation constant (Ka) and the base dissociation constant (Kb). The Ka and Kb values for H3PO4 and NH3 are:

Ka(H3PO4) = [H+][H2PO4-]/[H3PO4]

Kb(NH3) = [NH4+][OH-]/[NH3]

Since the value of Ka for H3PO4 is very small, it indicates that H3PO4 is a weak acid. Similarly, the value of Kb for NH3 is also small, indicating that NH3 is a weak base.

Now, we need to compare the strength of the acid-base pairs on each side of the equation:

On the left-hand side, the acid-base pair is H3PO4/NH3, which is a weak acid and a weak base, respectively.

On the right-hand side, the acid-base pair is NH4+/H2PO4-, which is a weak acid and a weak base, respectively.

Since both pairs are weak acids and weak bases, it is difficult to predict the direction of the equilibrium solely based on acid-base strength.

However, we can use the values of the equilibrium constants (Ka and Kb) to determine the direction of the equilibrium. The equilibrium constant for the reaction is given by:

Keq = [NH4+][H2PO4-]/[H3PO4][NH3]

Substituting the given values, we get:

Keq = (9.8 × 7.2)/(2.2 × 33) = 0.838

Since the value of Keq is less than 1, it indicates that the equilibrium lies towards the left-hand side of the equation. Therefore, the correct answer is:

a. To the left because the reactants are stronger acids and bases.

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None

Explanation:

methylene is an organic compound comprising and of One carbon and two hydrogens

Answer:

When a molecule has just has one carboxylic acid group, it is defined as a monocarboxylic acid.

Explanation:

hope it will help ^_^

Based on the rate constant of the reaction, the reaction rate, r 4.8 * 10⁻⁷ mol/L.s

The rate of a reaction is the number of moles of reactant molecules converted or the number of moles of product molecules formed per unit time.

It is the rate at which product molecules are formed or reactant molecules disappear.

The rate equation of a chemical reaction is an expression that describes the relationship between the rate of the chemical reaction and the concentration of the reactants in the chemical reaction.

The rate equation includes a rate constant which is a constant that is unique for a given reaction. The rate constant numerically describes the rate and direction of a chemical reaction.

Considering the given rate equation:

reaction rate = k [NH4 + (aq) ] [NO2(aq) ]

the data provided is as follows;

k =  3.20 x 10⁴ L/(mol⋅s)

[NH4+ ] = 0.100 mol/L and,

[NO2] = 0.0150 mol/L

The reaction rate, r will be:

r = 3.20 x 10⁻⁴ L/(mol⋅s) * 0.100 mol/L *  0.0150 mol/L

r = 4.8 * 10⁻⁷ mol/L.s

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Folded mountains like the himalayan mountains form along the boundary type is the convergent, both continental crust plates.

When two continental crust plates collide, they create folded mountains. This is because continental crust is thicker and less dense than oceanic crust, so when the two plates collide, they cannot easily sink into the mantle. Instead, they push against each other and fold upwards, creating mountain ranges like the Himalayas.

In contrast, when two oceanic crust plates collide (convergent, both oceanic crust plates), one plate typically sinks under the other, creating a subduction zone. When two oceanic crust plates move away from each other (divergent, both oceanic crust plates), new oceanic crust is created at the boundary. When two continental crust plates move away from each other (divergent, both continental crust plates), a rift valley is created. Therefore, the correct answer is convergent, both continental crust plates.

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The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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The total pressure of the gaseous mixture will be 0.184 atm.

The ideal gas equation is:

PV = nRT

Where P is pressure, V is the volume, n is the number of  the moles, R  is the constant of the gases, and T is  the temperature.

So, the sample of N₂O₃ will only have its temperature get doubled, with the same volume and the same number of moles. Temperature and  the pressure are directly related, so if one increases the other one also increases, then the pressure must double to the 0.092 atm.

The decomposition occurs as follows:

N₂O₃(g) ⇄ NO₂(g) + NO(g)

So, 1 mol of N₂O₃ will produce 2 moles of  products (1 of each), so n will double. The volume and temperature are now constants, and  pressure is directly proportional to the number of moles, so  pressure will  get doubled to 0.184 atm.

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Your question is incomplete, for full question please refer below:

A sample of N2O3(g) has the pressure of 0.046 atm . The temperature is (in K)  then doubled and the N2O3 undergo complete decomposition to NO2(g) and the NO(g). Find  total pressure of mixture of gases assuming constant volume and  with no additional temperature change

Over-titrating a sample of potassium hydrogen phthalate (KHP) results in an inaccurate calculation of the unknown molarity of the solution. This is because KHP is an impure substance and contains other substances, such as moisture.

If the sample is over-titrated, the total moles of KHP will be overestimated, resulting in an incorrect calculation.

The best way to prevent over-titrating is to use an accurately measured volume of titrant. This can be done by using a volumetric pipette or burette to measure out the exact volume of titrant required. Additionally, the tip of the titrant should be placed as close to the solution as possible to ensure that the entire volume is transferred.

Another way to prevent over-titrating is to check the equivalence point. The equivalence point is the point where the amount of titrant used is equal to the amount of KHP in the sample. This can be determined by comparing the colors of the indicator solution before and after the titrant has been added. If the colors of the indicator solution remain the same, it is likely that the sample has been over-titrated.

Finally, the sample should be titrated until the end point is reached. The end point is the point at which the amount of titrant added is greater than the amount of KHP in the sample. This is usually determined by observing the colors of the indicator solution. If the color of the indicator solution remains the same, the end point has not been reached and more titrant should be added.

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A mass of 12.5 grams of \(Na_2S_2O_3\) is needed to dissolve 4.7 g of AgBr in a solution volume of 1 L.

The balanced equation for the dissolution of AgBr is:

AgBr (s) ↔ \(Ag^+\) (aq) + \(Br^-\) (aq)

The solubility product expression for AgBr is:

Ksp =\([Ag^+][Br^-]\)= 3.3 x \(10^{-13}\)

The reaction between \(Ag^+\) and \(S_2O_3^{2-}\) is:

\(Ag^+\) (aq) + 2 \(S_2O_3^{2-}\) (aq) ↔ \([Ag(S_2O_3)_2]^{3-}\) (aq)

The reaction quotient for \([Ag(S_2O_3)_2]^{3-}\) is:

Kq = [\(Ag^+\)]\([S_2O_3^{2-}]^2\) / \([Ag(S_2O_3)_2]^{3-}\) = 4.7 x \(10^{13}\)

We can use the solubility product expression to find the concentration of \(Ag^+\) in the solution:

[\(Ag^+\)] = Ksp / \([Br^-]\) = 3.3 x \(10^{-13}\) / (4.7 g / 187.77 g/mol / 1 L) = 1.64 x \(10^{-10}\)M

We can then use the reaction quotient to find the concentration of \(S_2O_3^{2-}\) in the solution:

\([S_2O_3^{2-}]\) = √(Kq \([Ag(S_2O_3)_2]^{3-}\) / \([Ag^+]\)) = √(4.7 x \(10^{13}\) / 1.64 x \(10^{-10}\)) / 2 = 7.9 x \(10^{-2}\) M

Finally, we can use the concentration of \(S_2O_3^{2-}\) to find the mass of \(Na_2S_2O_3\) needed to dissolve the AgBr:

mass = concentration x volume x molar mass = 7.9 x \(10^{-2}\) M x 1 L x 158.11 g/mol = 12.5 g

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Answer: All matter has physical and chemical properties. Physical properties are characteristics that scientists can measure without changing the composition of the sample under study, such as mass, color, and volume (the amount of space occupied by a sample). Chemical properties describe the characteristic ability of a substance to react to form new substances; they include its flammability and susceptibility to corrosion. All samples of a pure substance have the same chemical and physical properties. For example, pure copper is always a reddish-brown solid (a physical property) and always dissolves in dilute nitric acid to produce a blue solution and a brown gas (a chemical property).

Physical properties can be extensive or intensive. Extensive properties vary with the amount of the substance and include mass, weight, and volume. Intensive properties, in contrast, do not depend on the amount of the substance; they include color, melting point, boiling point, electrical conductivity, and physical state at a given temperature. For example, elemental sulfur is a yellow crystalline solid that does not conduct electricity and has a melting point of 115.2 °C, no matter what amount is examined (Figure 1.3.1). Scientists commonly measure intensive properties to determine a substance’s identity, whereas extensive properties convey information about the amount of the substance in a sample.

All matter has physical and chemical properties. Physical properties are characteristics that scientists can measure without changing the composition of the sample under study, such as mass, color, and volume (the amount of space occupied by a sample). Chemical properties describe the characteristic ability of a substance to react to form new substances; they include its flammability and susceptibility to corrosion. All samples of a pure substance have the same chemical and physical properties. For example, pure copper is always a reddish-brown solid (a physical property) and always dissolves in dilute nitric acid to produce a blue solution and a brown gas (a chemical property).

Physical properties can be extensive or intensive. Extensive properties vary with the amount of the substance and include mass, weight, and volume. Intensive properties, in contrast, do not depend on the amount of the substance; they include color, melting point, boiling point, electrical conductivity, and physical state at a given temperature. For example, elemental sulfur is a yellow crystalline solid that does not conduct electricity and has a melting point of 115.2 °C, no matter what amount is examined (Figure 1.3.1). Scientists commonly measure intensive properties to determine a substance’s identity, whereas extensive properties convey information about the amount of the substance in a sample.

Explanation: Read the article and simplify it in your own words.

Answer:

An outlier on a scatter plot represents something that doesn't fit.

The outlier on this scatter plot is D.(105, 320) might represent a newborn shark

Answer:

190

Explanation:

Gold has atomic number of 79, which is the number of protons.

Mass number = #protons + #neutrons = 79 + 111 = 190

Answer:

It's from the quation:

\( \boxed{ \mathsf{ \underline{2K} +\underline{2 H_2O} \rightarrow \:\underline{2}KOH + H_2 }}\)

(How did I know?)

I learnt it while studying the elements of group 1.

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K, here, is Potassium. It's position in the periodic table is Group 1, Period 4.

Valance electrons of elements of this group contribute to the valency of the group's elements I.e.,

valency of Alkali metals is 1!

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What are hydroxides?

Hydroxides of an element comprises one atom each of oxygen and Hydrogen bonded together, acting as an anion, the hydorxide anion — OH-.

Example:

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

In the question, The reactants are missing but the products are known, that are, Potassium Hydroxide and water.

Keeping the above mentioned property in mind, the reactants come clear as Potassium(K) and Cold water(H2O).

that makes the equation:

\( \mathsf{K + H_2O \rightarrow \: KOH + H_2 }\)

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For an equation to be balanced, the number of atoms of each elements on both side of the equation must be equal.

Number of atoms of each element on the LHS:

(subscript in front of an atom represents its number of atoms in the compund)

Number of atoms of each element on the LHS:

The number of Hydrogen atoms on boths sides is NOT balanced!

Hit and trial method:

If we add a "2" in front of K, H2O and KOH

\( \mathsf{ \underline{2K} +\underline{2 H_2O} \rightarrow \:\underline{2}KOH + H_2 }\)

Number of atoms on both the sides become equal.

(TIP: This comes thru practice:/. but main point is even out the oxygen and Hydrogen atoms first. like if it's 3 multiply it by 2 and you get an even number, I.e., 6)

Number of atoms of each element on the LHS:

Number of atoms of each element on the LHS:

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Hence, the balanced form of the equation is:

\( \boxed{ \mathsf{ \underline{2K} +\underline{2 H_2O} \rightarrow \:\underline{2}KOH + H_2 }}\)

Rate constant of reaction at 1200 K : 1.20 times 10 9 M -1 s -1

What is Rate of Reaction?

The rate of reaction in a chemical reaction is the speed at which the products are formed from the reactants. It helps us comprehend how rapidly a reaction might happen. For instance, cellulose burns exceedingly quickly in fire and the process is complete in less than a second.

The rate of reaction, also known as reaction rate, is the rate at which reactants transform into products. It should go without saying that different chemical reactions occur at different rates. While certain chemical reactions take place extremely immediately, others usually take some time to reach their final equilibrium.

Rate of reaction = k [NH 3] x [NO] y, where k is the reaction's rate constant, x is the order of the reaction with respect to NH 3, and y is the order of the reaction with respect to NO

Rate of reaction = k [NH 3 ] [ NO ]  

Rate constant of reaction at 1200 K : 1.20 times 10 9 M -1 s -1

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Answer:

For every 5 psu increase in salinity, the freezing point decreases by 0.28 degrees Celsius (0.5 degrees Fahrenheit); thus, in polar regions with an ocean salinity of about 32 psu, the water begins to freeze at -1.8 degrees Celsius (28.8 degrees Fahrenheit).

Explanation:

Freezing increases salinity, while melting decreases salinity.

took the test lol

Explanation:

chemical energy electric energy light energy heat energy

When a person turns on a lightbulb by connecting its circuit to a battery, several energy transformations occur. There are  three types of energy transformations involved in the process.

1. Electrical to Light Energy:

When the circuit is completed by connecting the lightbulb to the battery, electrical energy from the battery flows through the circuit and enters the lightbulb. Inside the lightbulb, this electrical energy is transformed into light energy. The lightbulb contains a filament that heats up due to the flow of electricity, causing it to emit light. Therefore, electrical energy is transformed into light energy in this process.

2. Chemical to Electrical Energy:

The battery stores chemical energy, which is converted into electrical energy when the circuit is closed. Inside the battery, chemical reactions occur, generating a flow of electrons. These electrons create an electric current, which then travels through the circuit and powers the lightbulb. So, in this step, chemical energy from the battery is transformed into electrical energy.

3. Chemical to Heat Energy:

As electrical energy passes through the filament in the light bulb, some of it is converted into heat energy. The resistance of the filament causes it to heat up, and this heat energy is released into the surroundings. This is why a light bulb feels warm when it has been turned on for some time. Thus, in this step, electrical energy is transformed into heat energy.

Thus,electrical energy from the battery is transformed into light energy in the light bulb. Chemical energy in the battery is converted into electrical energy to power the lightbulb. Electrical energy passing through the light bulb's filament is transformed into heat energy.

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Answer:



Explanation:

(1) Homogeneous, (2) Heterogeneous (solid), (3) Heterogenized homogeneous catalyst and (4) Biocatalysts

Answer:

B) Rubbing alcohol

Explanation:

It is a solution

Answer:

replacement

Explanation:

Because the No and The Ci switch but it might not be the answer but I know that they have to switch and replacement sounds like the best answer

Answer:

Oxidation

Explanation:

Hope this helps :)

Answer:

f = frequency = 590,000 Hz ===> 59×10^4 Hz

λ = Wavelength = ?

c = Speed of light in a vacuum = 3 × 10^8 m/s

** Hz = 1/sec

___o___o___

\(f = \frac{c}{λ} \\ \\ λ = \frac{c}{f} \\ \\ λ = \frac{3 \times {10}^{8} }{590000} \\ \\ λ = \frac{3 \times {10}^{8} }{59 \times {10}^{4} } \\ \\ λ =0.0508 \times {10}^{4} \: m \\ \\ λ = 508 \times {10}^{ - 4} \times {10}^{4} \: m \\ \\ λ = 508 \: m\)

I hope I helped you^_^

Answer:

the covalent compound would be

SO2

Answer:

D) Blender..................

The intermolecular forces listed in the answer options are ion-dipole, hydrogen bonding, dipole-dipole, and Van der Waals forces, listed from strongest to weakest.

Ionic bonding is stronger than all of the intermolecular forces mentioned, yet it is not an intermolecular force in and of itself. The strength of the London force will vary greatly if the molecules have highly differing molar masses (by a factor of 2 or more). In this situation, the one with the significantly higher molar mass will have stronger overall intermolecular forces. An electronegative atom on a second molecule is drawn to a hydrogen atom on a first molecule. The characteristics of substances are influenced by intermolecular forces. Larger molecules have stronger intermolecular forces than smaller molecules do.

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