The solubility of a gas is 0.890 g/L at a pressure of 120 kPa. What is the solubility of the gas if the pressure is changed to 100 kPa, given that the temperature is held constant?

Answer: b=3-2c-a

Explanation:

a+b+2c=3

a-a+b+2c=3-a

b+2c=3-a

b+2c-2c=3-2c-a

b=3-2c-a

17.0 g of Al₂O₃ forms from 16 g of O₂ and excess Al ,and when the molar mass of  Al₂O₃ is 102 g/mol.

Molar mass is the mass of one mole of a substance. It is usually expressed in units of grams per mole (g/mol). For example, the molar mass of carbon is 12.01 g/mol, which means that one mole of carbon has a mass of 12.01 grams. Molar mass is useful in chemistry because it allows us to convert between mass and moles of a substance, which is important for many chemical calculations.

The molar mass of  Al₂O₃ is 102 g/mol, which means that for every 102 g of  Al₂O₃ produced, 3 × 32 g (or 96 g) of O₂ is consumed.

We can use this ratio to find the mass of  Al₂O₃ formed from 16 g of O₂:

96 g of O₂ produces 102 g of  Al₂O₃

1 g of O₂ produces (102 g / 96 g) of Al₂O₃

16 g of O₂ produces (102 g / 96 g) × 16 g = 17.0 g of  Al₂O₃

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Answer:

1.58 102 mol

Explanation:

I just looked it up on Quizlet.

1.58 102 moles of NaOH must be dissolved in 1.00 L of water to make NaOH (aq) with a pH of 12.2.

One mole of any substance weighs about the same as the molecular mass of that substance. Hence, the number of moles of sodium hydroxide contained in 160 g of it is 4 moles.

Number Of Moles Formula

1 The formula for the number of moles formula is expressed as.

Given.

2 The number of moles formula is.

3 The number of moles = Mass of substance / Mass of one mole.

4 Number of moles = 95 / 86.94.

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The source of gases for the secondary atmosphere of the earth was Volcanic Eruptions.

The scientist think that the atmosphere today is completely different from what it used to be originally and therefore they call it secondary atmosphere.

Internal volcanic activity or the deposit of debris from comet collisions produce a secondary atmosphere. 

The secondary atmosphere is thought to have formed as a result of the numerous volcanic eruptions that occurred from the start of Earth's early periods.

Although each volcano is unique, they all emit gases such as H₂O, CO₂, SO₂, H₂S, HCl, N₂, NO₂, and others.

These gases are formed due to melting of the Earth's crust.

Volcanic activity  renew the atmosphere's molecules.

These molecules are not the Nitrogen and Oxygen that make up the atmosphere today.

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Answer:

The amount of work a system can do is limited by the changes in entropy that occur and cause energy to be dissipated as heat. Systems that dissipate less energy as heat will be able to do more work than systems that dissipate more energy as heat.

Explanation:

The amount of work a system can do is limited by the changes in entropy that occur and cause energy to be dissipated as heat.

Entropy is also a measure of the number of possible arrangements the atoms in a system can have. In this sense, entropy is a measure of uncertainty or randomness.

The amount of work a system can do is limited by the changes in entropy that occur and cause energy to be dissipated as heat.

Systems that dissipate less energy as heat will be able to do more work than systems that dissipate more energy as heat.

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Extrusion is the feature form at Earth's surface from the cooling of lava.

They are the ones that originate from a sudden cooling of the incandescent magma when it comes to the surface, which means that there is no time for crystals to form, either partially or totally.

Therefore, we can conclude that typical volcanic rocks are formed by the rapid cooling of lava and pyroclastic fragments.

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Answer:

A.

Explanation:

The correct order of increasing density at STP among the given gases is; NH₃ < N₂ < Kr < N₂O₄. Option D is correct.

To determine the order of increasing density at STP among the given gases, we need to consider their molar masses and the behavior of gases under standard conditions.

The molar masses of gases are as follows;

N₂O₄; 92.01 g/mol

N₂; 28.01 g/mol

Kr; 83.80 g/mol

NH₃; 17.03 g/mol

At STP (Standard Temperature and Pressure), gases behave ideally, meaning they have similar volumes and occupy the same amount of space. The density of a gas will be directly proportional to its molar mass. Therefore, the gas with the lowest molar mass will have the lowest density.

Comparing the molar masses of the given gases, we can determine the order of increasing density;

NH₃ < N₂ < Kr < N₂O₄

Hence, D. is the correct option.

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Answer:

See explanation

Explanation:

For the equilibrium; A + B ⇄C + D

At time = 0 secs, the concentration of products is zero while the concentration of reactants decreases steadily.

As time goes on, the concentration of the reactants continues to decrease while the concentration of products increases.

At equilibrium the concentration of both reactants and products are now the same because the rate of forward reaction is equal to the rate of reverse reaction are now the same.

For a science student to be successful in separating a mixture of two substances in the liquid state using distillation, the boiling points of the two liquids should be significantly different.

In distillation, a mixture of liquids is heated, and the vapor produced is condensed and collected. The liquids in the mixture will have different boiling points, so the substance with the lower boiling point will vaporize and condense at a lower temperature compared to the substance with the higher boiling point.

For a successful distillation, it is important that the boiling points of the two liquids are significantly different so that they can be separated easily. If the boiling points of the two liquids are too close, it will be difficult to separate them using distillation.

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The amount of aluminum that can be formed by the passage of 305 C (coulombs) through an electrolytic cell containing a molten aluminum salt is 0.0286 g

Faraday's law of electrolysis states that the amount of substance produced during electrolysis is directly proportional to the amount of electricity passed through the cell. The relationship can be expressed by the equation:

moles of substance = (current in amperes x time in seconds) / (Faraday's constant x charge on one mole of the substance)

where Faraday's constant is 96,485.3 C/mol and the charge on one mole of aluminum is 3 x 96500 C (since aluminum has a 3+ charge in the electrolyte). To find the mass of aluminum produced, we need to first calculate the number of moles of aluminum produced, and then multiply by its molar mass (27 g/mol).

So, the number of moles of aluminum produced is:

moles of aluminum = (305 C / (3 x 96500 C/mol)) x (1 A / 1 C) x (1 s / 1 s)

moles of aluminum = 0.001059 mol

Finally, the mass of aluminum produced can be calculated by multiplying the number of moles by the molar mass:

mass of aluminum = 0.001059 mol x 27 g/mol

mass of aluminum = 0.0286 g

Therefore, approximately 0.0286 grams of aluminum can be formed by the passage of 305 C through an electrolytic cell containing a molten aluminum salt.

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A hallmark of many ionic compounds is their ability to dissolve in water through a process called hydration. Humidification refers to the process of adding moisture to the air.

The process through which many ionic compounds dissolve in water is called "hydration." This process involves the ionic compound's anions and cations being surrounded by water molecules, leading to the compound's dissolution.Hydration occurs when an ionic compound dissolves in water because the water molecules surround and separate each ion in the crystal lattice. While the negative ends of the water molecules (oxygen atoms) are drawn to the positive ions (cations), the positive ends (hydrogen atoms) are drawn to the negative ions (anions). The ionic molecule can dissolve in water thanks to this hydration process, creating an aqueous solution.

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2AgBr(s) ⇒ 2Ag(s) + Br₂(l) ΔH = -220kJ ⇒ for 2 mol Ag

mol Ag = 7.08 : 108 g/mol = 0.065

the enthalpy change = 0.065/2 x -220 kJ = -7.15 kJ

Fluorine (F) has seven electrons in its outermost shell. This shell is referred to as the valence shell.

Fluorine is the element with the atomic number 9, which means it has nine protons in its nucleus. It has the electron configuration of 1s22s22p5, with two electrons in the first energy level, two electrons in the second energy level, and five electrons in the third energy level.

                                     The outermost electrons in the third energy level, that is, 2s2p5, are referred to as valence electrons. They participate in chemical bonding and determine the chemical properties of the element.

                                Fluorine requires one more electron to complete its octet, which is a stable configuration of eight valence electrons. This is why it is highly reactive and tends to gain an electron from other elements to form the fluoride ion (F-) in chemical reactions.

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Answer:

4

Explanation:

bc Ca is 1 C is one L is two

Answer:

A BIG DI*CK

Explanation:

Answer:

Earthquake...

Explanation:

I mean, its kinda the only one that makes sense aha

And took test!

The word earthquake identifies the shaking that results from movement under Earth's surface.

Hence, option 1 is the answer.

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Answer:

ionic compond

Explanation:

Sn(ClO3)4

The total mass of the products is 853.8 g.

We know that we have to apply the principles of stoichiometry so as to be able to obtain the mass of the mass of the products and then the total mass of the products that is obtained in the reaction.

We have that in the question; 496. 5 grams of lead II nitrate reacts with potassium bromide is such a way that the lead II nitrate would be completely consumed in the reaction. This means that the lead II nitrate is the limiting reactant in the reaction.

Number of moles of the lead II nitrate = 496. 5 grams /331 g/mol

= 1.5 moles

If 1 mole of  lead II nitrate produces 1 mole of lead II bromide

Mass of lead II bromide produced = 1.5 moles * 367 g/mol

= 550.5 g

If 1 mole of lead II nitrate produces 2 moles of potassium nitrate

1.5 moles of lead II nitrate produces  1.5 * 2 /1

= 3 moles of  potassium nitrate

Mass of  potassium nitrate = 3  moles * 101.1

= 303.3 g

Total mass produced = 550.5 g + 303.3 g

= 853.8 g

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Answer:  the number of grams of AgNO3 present in its 7.4 moles is 1257.

Answer:

C) the components

Explanation:

The term component is referred to as the distinctively recognizable part, piece, of a system that is required to complete a function, in that particular system. Moreover, it carries out a distinguishable and necessary function in the operation of a specific system.  For example, a computer has a number of components that make it whole, and the most essential of them is the Central Processing Unit.

Answer:

c) the components

Explanation:

I took the quiz

The mass copper sulphate CuSO₄ in 30ml solution is 957.6g.

A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.

To determine the mass of copper sulphate in the given solution, compare both the molarity given:

M₁V₁=M₂V₂

\(\frac{n_1}{V_1} =\frac{n_2}{V_2}\)

0.1/0.5=n₂/30         cm³=ml

n₂=6 moles

6×159.5=957.6g

Multiply the calculated moles with the relative mass/molecular mass to get the mass of CuSO₄.

Hence, the mass of CuSO₄ is 957.6g

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The correct answer is:

c. Cl is oxidized, Zn is reduced.

In the given reaction:

Zn(s) + Cl2(g) → ZnCl2(s)

Zinc (Zn) is being oxidized, and chlorine (Cl) is being reduced.

Oxidation refers to the loss of electrons, while reduction refers to the gain of electrons.

In this reaction, the zinc (Zn) atoms in the solid state (s) are oxidized. They lose two electrons each to form Zn²⁺ ions in the ZnCl₂ compound. Zinc is going from an oxidation state of 0 to +2, indicating oxidation.

On the other hand, the chlorine (Cl) molecules in the gaseous state (g) are being reduced. Each chlorine molecule gains two electrons to form chloride ions (Cl⁻) in the ZnCl₂ compound. Chlorine is going from an oxidation state of 0 to -1, indicating reduction.

Therefore, the correct answer is:

c. Cl is oxidized, Zn is reduced.

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1. The differential equation satisfied by y(t) is:  dy/dt = 0.6 kg/min

The amount of salt in the tank after t minutes can be represented by the function y(t). We need to find the differential equation that y satisfies.
Initially, the tank contains 100 L of pure water, which means there is no salt in the tank. As time passes, a solution with a salt concentration of 0.3 kg/L is added at a rate of 7 L/min. The salt concentration in the tank will increase with the addition of this solution.
At the same time, the solution is drained from the tank at a rate of 5 L/min. This will result in a decrease in the salt concentration in the tank.
To find the differential equation satisfied by y(t), we need to consider the rate of change of salt in the tank.
Rate of change of salt in the tank = Rate of salt added - Rate of salt drained
The rate of salt added is given by the product of the concentration of the solution (0.3 kg/L) and the rate at which the solution is added (7 L/min). So, the rate of salt added = 0.3 kg/L * 7 L/min.

The rate of salt drained is given by the product of the concentration of the solution (0.3 kg/L) and the rate at which the solution is drained (5 L/min). So, the rate of salt drained = 0.3 kg/L * 5 L/min.

Therefore, the differential equation satisfied by y(t) is:
dy/dt = (0.3 kg/L * 7 L/min) - (0.3 kg/L * 5 L/min)

Simplifying the equation:
dy/dt = 2.1 kg/min - 1.5 kg/min
dy/dt = 0.6 kg/min

So, the differential equation satisfied by y(t) is:
dy/dt = 0.6 kg/min

2. The amount of salt in the tank after 40 minutes is 24 kilograms.

To find the amount of salt in the tank after 40 minutes, we can solve the differential equation.

dy/dt = 0.6 kg/min

Integrating both sides with respect to t:
∫dy = ∫0.6 dt

Integrating, we get:
y = 0.6t + C

To find the value of C, we can use the initial condition that the tank initially contains 100 L of pure water, which means there is no salt. So, at t = 0, y = 0.

Substituting these values into the equation:
0 = 0.6(0) + C
C = 0

Therefore, the equation becomes:
y = 0.6t

Now, we can find the amount of salt in the tank after 40 minutes by substituting t = 40 into the equation:
y = 0.6(40)
y = 24 kg


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When Radon-228 undergoes alpha decay, the Radon-228 nuclide emits an alpha particle (He nuclei), the mass number increases by four, and the number of protons decreases by two.

During alpha decay, an unstable nucleus emits an alpha particle, which consists of two protons and two neutrons bound together. In the case of Radon-228, the nucleus emits an alpha particle, resulting in the formation of a daughter nuclide. The emission of an alpha particle decreases the number of protons in the nucleus by two because the alpha particle carries two protons away. Simultaneously, the mass number of the nucleus decreases by four because the alpha particle, with its two protons and two neutrons, is ejected from the nucleus.

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The reagent NaBH₂/CH₃OH can be used to convert Ph-NO₂ into Ph-NH₂. This reagent serves as a reducing agent in the conversion process. So, option (A) NaBH₂/CH₃OH is correct.

Ph-NO₂ is the chemical formula for nitrobenzene, which contains a nitro group (-NO₂) attached to a phenyl group. To convert nitrobenzene into aniline (Ph-NH₂), the nitro group needs to be reduced to an amino group.

NaBH₂/CH₃OH is a commonly used reagent for the reduction of nitro compounds. Sodium borohydride (NaBH₂) is a mild reducing agent that can selectively reduce nitro groups to amino groups. When NaBH₂ is dissolved in methanol (CH₃OH), it provides the necessary conditions for the reduction reaction to occur.

In the presence of NaBH₂/CH₃OH, the nitro group (NO₂) in nitrobenzene is reduced to an amino group (NH₂), resulting in the formation of aniline (Ph-NH₂).

Ph-NO₂ + NaBH₂/CH₃OH → Ph-NH₂ + NaOH + BH₃

The sodium hydroxide (NaOH) and borane (BH₃) are byproducts of the reduction reaction.

So, the reagent NaBH₂/CH₃OH (sodium borohydride/methanol) can be used to convert Ph-NO₂ (nitrobenzene) into Ph-NH₂ (aniline) by selectively reducing the nitro group to an amino group. This reagent serves as a mild reducing agent in the conversion process.

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The IUPAC name of the compound is propanal and acetone.

Propanal is also called propanaldehyde, and it is an aldehyde which has one double bond and oxygen.

Acetone is a ketone. Ketones have functional group of R2CO.

Thus, the IUPAC name of the compound is propanal and acetone.

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Thermolysis, photolysis, and electrolysis are three different forms of breakdown reactions. A single source was cooked to yield two or more objects in each instance (decomposition).

Decomposition reactions happen when complex chemical entities split apart into smaller components. Decomposition reactions often demand energy input. For instance, the thermal breakdown of potassium hydroxide (KClO3) is a typical technique used during laboratories to generate oxygen gas.

Below is a typical illustration of a thermal breakdown reaction. Calcite breaks down into calcareous dioxide and atmospheric co2 when heated. The production of quick lime, a crucial component in numerous industries, uses this procedure.

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Answer:

it'll produce carbondioxide bubbles

Answer:

it would prevent the milk from curdling

Explanation:

baking soda is regularly added to milk, believe it or not

Answer:

84 g of N₂        

Explanation:

We begin from the reaction:

N₂O₄  +  2N₂H₄ →  3N₂  + 4H₂O

  1st step: Find out the limiting reactant.

We convert the mass to moles.

       276 g . 1mol/ 92g = 3 moles of N₂O₄

64 g . 1mol / 32g = 2 moles of hidrazine  

Limiting reactant is the hydrazine. Ratio is 1:2, then for 3 moles of tetroixde I may need 6 moles of N₂H₄. (But I only have 2).

To determine the grams of produced nitrogen we see stoichiometry (2:3)    

2 moles of hydrazine can produce 3 moles of N₂

Definetaly our 2 moles make 3 moles of gas.

We convert the moles to mass.

3 mol . 28g /1mol = 84 g of N₂