Calculate the solubility (in mol/L) of Fe(OH)3 (Ksp = 4.0 x 10^-38) in each of the following situations:
(A) Pure water (assume that the pH is 7.0 and remains constant).
(B) A solution buffered at pH = 5.0.
(C) A solution buffered at pH = 11.0.

When you count atoms, remember to multiply the coefficient number and the subscript number to find the number of atoms of that element. Examples: ▪ 2H2O. Number of atoms Number of molecules = 2. H-4.

Answer:Temperature

Explanation:

Answer:

for the Lewis diagram of water, hydrogens should go on the outside with oxygen in the center

Explanation:

hydrogens always go on the outside

Considering the definition of the law of conservation of matter, the law of conservation of matter establishes that matter cannot be created or destroyed (option C).

The law of conservation of matter holds that, within a closed system, the amount of matter involved in a chemical reaction is constant, meaning a closed system means an environment that isolates the components involved in the reaction from the outside.

In other words, this law establishes that the mass of the reactants consumed is equal to the mass of the products obtained, even though they have been transformed into each other.

In other words, the law of conservation of matter states that matter is neither created nor destroyed during a chemical reaction, it is only transformed.

In summary, the law of conservation of matter establishes that matter cannot be created or destroyed (option C).

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Considering the given equation of reaction in equilibriums:

2CH3OH(I) + 302(g) ⇄ 2CO2(g) + 4H₂O(g) + Energy

Reaction Favored | Forward

Direction of Shift | R

[CH3OH] | ↓

[02] | ↓

[CO2] | ↑

[H₂O] | ↑

Temp Change | ↓

Add CH3OH | F

Remove H₂O | R

Add CO2 | F

Increase Temp | F

Cool Reaction | R

Remove CH3OH | R

Add O2 | F

Remove CO2 | R

Decrease Pressure | F

In chemistry, a reaction in equilibrium is a state in which the rate of the forward reaction is equal to the rate of the reverse reaction, and there is no net change in the concentrations of the reactants and products over time.

At equilibrium, the concentrations of the reactants and products remain constant, and the system appears to be static. However, the equilibrium state is actually dynamic, with molecules constantly colliding and exchanging energy.

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Answer: anhydrous CaCl 2 :0H 2 O

monohydrate CaCl 2 :1H 2 O

a di-hydrate CaCl 2 :2H 2 O

Explanation:

Explanation:

Since this is an equilibrium problem, we apply le chatelier principle. This principle states that whenever a system at equilibrium is disturbed due to change in several factors, it would move in a way to annul such change.

C2H4(g) + Cl2 ⇔ 2C2H4Cl2(g)

When the concentration of C2H4 is increased, there is more reactant sin the system. In order to annul this change, the equilibrium position will shift to the right favoring product formation.

When the concentration of C2H4Cl2 is increased, there is more product in the system. To annul this change, the equilibrium position will shift to the left, favoring reactant formation.

475 g is the correct response to the query. This is true because the combined mass of two solutions with masses of 450 g and 350 g equals 800 g. 125 g of solid crystals are created and fall to the bottom of the container as a result of a chemical reaction.

As a result, the mass of the residual solution is equal to 475 g, or 800 g less 125 g. It is significant to observe that the masses of the two solutions that were combined originally do not equal those of the solid crystals or the leftover solution.

This is because the two solutions' chemical reaction when combined results in a transition of the matter that is resulting in the production of a new substance.

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An example that shows kinetic energy becoming potential energy is when a ball is dropped from a tall building. That is option B.

Kinetic energy can be defined as the type of energy that is being possessed by an object or a body that is in motion.

Potential energy is the type of energy that is possessed by a body or an object that is steady or static.

A ball is said to shift from having kinetic energy to having potential energy once it stops moving like when it is being dropped from a given height.

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Answer:

A

Explanation:

it has a methyl group, ethyl group and amine group

The correct IUPAC name for the structure shown in the provided image is "ethylamine." The structure consists of a central nitrogen atom bonded to two carbon atoms.

The correct IUPAC name for the structure shown in the provided image is "ethylamine." The structure consists of a central nitrogen atom bonded to two carbon atoms. According to the IUPAC naming rules, the longest carbon chain is selected as the parent chain, which in this case consists of two carbon atoms. The substituent attached to the parent chain is an ethyl group, denoted as "C2H5". The amine functional group, which consists of the nitrogen atom, is named as "amine". Since there is only one amine group attached to the carbon chain, it is referred to as "ethylamine." Therefore, option C) "ethylamine" is the correct IUPAC name for the given structure.
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Answer:

O ice melts at 0°C that is the answer

Explanation:

hope the picture above make sense:)

A forensic scientist would best investigate categorize the blood stain by b) impact.

It is given that the blood is splattered on the wall. It was splattered by a gunshot and is also given that the blood traveled through air before splattering.

Since, it was a gunshot the trigger from the gun would surely create a force on the Blood which would push the blood to move forward.

This blood when falling onto the surface of the wall would create an impact depending upon the speed it traveled through the air.

Therefore, the crime scene would be best investigated and categorize the blood stain based on impact of the blood shot from the gun and can move to further investigation.

Hence the correct option is b) and the correct answer is impact.

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Answer:

A molecule is the answer.

Answer:

THE HEAT REQUIRED TO CHANGE 2 KG OF ETHANOL FROM 26 °C TO THE BOILING POINT AND TO VAPOR AT THAT TEMPERATURE IS 1965.175 KJ.

Explanation:

Boiling point of ethanol = 78.29 °C = 78.29 + 273 K = 351.29 K

Mass = 2 kg = 2000 g

Final temp. = 26.0 °C = 26 + 273 K= 299 K

Change in temperature = (78.29 - 26) °C = 52.29 °C

1. Heat required to raise the temperature from 26 °C to the boiling point?

Heat = mass * specific heat * change in temperature

Heat = 2000 * 2.44 * 52.29

Heat = 255 175.2 J

2. Heat required to change the liquid to vapor at that temperature?

Heat = mass * enthalphy of vaporization

Heat = 2000 * 855

Heat =1 710000 J

The total heat required to raise the temperature of 2 kg of ethanol from 26 °C to the boiling point and then to change the liquid to vapor at that temperature will be:

Heat = mcT + m Lv

Heat = 255 175.2 J + 1710000 J

Heat = 1965175.2 J

Heat = 1965.175 kJ of heat.

Answer:

This question appears incomplete

Explanation:

However, the chance of finding one isotope of an element is not the same for all elements because some elements/isotopes are more in abundance than some other elements/isotopes; for example the most abundant element on earth is nitrogen-14, hence the chances of finding nitrogen-14 in nature is higher the chances of finding any isotope of Xenon.

Also, while isotopes occur naturally, some do not. Hence, the chances of finding a naturally occurring isotopes (no matter how rare like Xenon-126) is higher than the chances of finding artificial radioisotopes like technetium-95 and promethium-146 (whose chances are zero because they cannot be found naturally occurring).

The balanced chemical equation is, Mg(s)+ SnSO4 (aq.) → MgSO4(aq.)+ Sn(s) .

The half cell reactions are, Sn2+(aq.)  + 2e-    ----->   Sn(s) and Mg(s)  ---->  Mg2+(aq.)   +  2e-  

A Half cell reaction is expressed either as an oxidation reaction in which electrons are lost or a reduction reaction where electronic are gained. The reactions occur in an electrochemical cell in which the electrons are lost at the anode through oxidation and consumed at the cathode where the reduction occurs. Half-cell reactions are useful in galvanic and voltaic cells in which the electrons flow from the anode to the cathode through an electrolyte to produce an electromotive force (EMF).

Half cell Reaction at cathode : Reduction 

Sn2+(aq.)  + 2e-    ----->   Sn(s)

Half- cell reaction at anode  : Oxidation 

Mg(s)  ---->  Mg2+(aq.)   +  2e-  

E1  is made of   Mg

E2 is made of  Sn 

Chemical species in solution S1 are  Mg2+  and SO42-  .

Chemical species in solution S2 are   Sn2+  and SO42-  

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Answer:

sample 3

Explanation:

i did this

Answer:

Sample 3

Explanation:

physical weathering means the breaking down of an object physically and the small cracks represent physical change.

Population density is the number of specific organisms living in a particular area. The tectonic plate movements in the Ring of Fire area can cause volcanic eruptions and earthquakes.

Tectonic plates are the parts of the crust and the mantle of the earth layer that is also called the lithosphere plate. They are not stationary and have slight movements on the mantle which comprises the hot lava.

The movement of these tectonic plates in the area of the Ring of fire causes the eruption of the lava and disrupts the crust causing an earthquake. This consequence affects the life habiting them.

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Answer:

im pretty sure because the plates move which causes these natural disasters

Explanation:

Answer:

The edge of its orbital

Explanation:

The size of an atom is defined by the edge of its orbital. However, orbital boundaries are fuzzy and in fact are variable under different conditions

Answer:

161.57 K

Explanation:

V1/T1 = v2/T2

(5.24 L)/(411 K) = (2.06 L)/T2

T2 = 161.57 K

The equilibrium constant of the reaction is 76176.

In chemistry, the equilibrium constant is used to show the extent to which we can convert reactants to products in a given chemical process. A large value of the equilibrium constant shows that most of the reactants are converted into products under the given conditions. A small value of the equilibrium constant shows that most of the reactants are not converted into products.

Thus, if we have the reactions;

(1) 1/2 X2(g) + 1/2 Y2(g) ↔ XY(g)

(2) 2XY(g) ↔ X2(g) + Y2(g)

It then follows that;

K1 = [XY]/[X2]^1/2 [Y2]^1/2

K2 =  [XY]^2/[X2] [Y2]

It is clear that;

K2 = (K1)^2

K2 = (276)^2

K2 = 76176

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The final temperature of the water is 44.2°C after 15.5 kJ is absorbed by 35.0g of water at 20.0°C

How much energy is required to heat 50.0g of water from 20.0°C to 80.0°C? (specific heat of water = 4.184 J/g°C)

The energy required is 12,524 J.

How much energy is required to melt 25.0g of ice at 0.0°C? (heat of fusion for water = 6.01 kJ/mol)

The energy required is 1502.5 J.

Using the equation q = mcΔT, where q is the heat absorbed, m is the mass of the water, c is the specific heat of water, and ΔT is the change in temperature:

q = mcΔT

Rearranging the equation to solve for ΔT:

ΔT = q / (m ×c)

ΔT = 15.5 kJ / (35.0 g × 4.184 J/g ×°C)

ΔT ≈ 10.8° C

Therefore, the final temperature after 15.5 kJ is absorbed by 35.0g of water at 20.0° C is approximately 30.8° C.

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The predominant product is 3-ethylpent-2-ene, and it's miles fashioned with the aid of using an E2 mechanism.

Methoxide ion is a sturdy base, so we are expecting an E2 mechanism.input picture supply here.Methoxide (methoxide ion; MeO-): CH3O-; the conjugate base of methanol. A robust base (often utilized in E2 and enolate reactions) and an amazing nucleophile.

The dialogue of alkyl halide reactions mentioned that 2º and 3º-alkyl halides enjoy speedy E2 removal whilst handled with robust bases inclusive of hydroxide and alkoxides. Methoxide ion is a strong base, so we're waiting for an E2 mechanism here.

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Answer:

2.74

Explanation:

Okay, let's go through the previous steps:

Pre-1982 pennies contribute 1.24 g to the overall mass

Post-1982 pennies contribute 1.50 g to the overall mass

To calculate the weighted average mass, I'll add these contributions together:

Pre-1982 contribution: 1.24 g

Post-1982 contribution: 1.50 g

Total weighted average mass = 1.24 g + 1.50 g = 2.74 g

Answer:

When are subscripts used in formulas for ionic compounds? When more than one of the ion is the simplest ratio of the ions. Describe a metallic bond. Each positive metal ion is attracted to delocalized valence electrons.

Answer:

A type of an atom which has a different number of neutrons but the same atomic number, therefore making it the same element. This atom would still have the same properties as well. (Ex: Vanadium-51 is an isotope of Vanadium that has 51 neutrons but still has 23 protons, as its atomic number is 23.)

Isotopes are variants of an element that have the same number of protons in their atomic nucleus, identifying them as the same chemical element, but differ in the number of neutrons.

The variations in neutron numbers among isotopes lead to differences in their atomic masses, resulting in isotopes having slightly different physical properties while retaining similar chemical behavior.

For example, in the case of boron, the two isotopes listed may have the same number of protons (5), but one has 6 neutrons, and the other has 7 neutrons, leading to slightly different atomic masses.

Similarly, for carbon and oxygen, the isotopes exhibit variations in neutron numbers while maintaining the same number of protons, defining them as isotopes of the respective elements. Isotopes play a crucial role in various scientific fields, including radiometric dating, nuclear energy, and medical imaging.

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