(10) A certain solution has a pH of 3.25.
a) Find the pOH of the solution.
b) Find the [H] of the solution.
c) Find the [OH] of the solution.

I really don’t understand this :/

It saves energy, minimizes air and water pollution, cuts greenhouse gas emissions, and protects natural resources. Stanford recycled, composted, and otherwise decreased its trash by 62% and reduced landfill by 35%.

It saves energy, minimizes air and water pollution, cuts greenhouse gas emissions, and protects natural resources. Stanford recycled, composted, and otherwise decreased its trash by 62% and reduced landfill by 35%. The process of transforming waste resources into new materials and things is known as recycling. This notion frequently includes the recovery of energy from waste materials. The capacity of a material to regain the attributes it had in its original form determines its recyclability. Recycling is the collection and processing of items that would otherwise be discarded as waste in order to create new goods. Recycling may help your town, economy, and environment.

Here,

It saves energy, decreases air and water pollution, lowers greenhouse gas emissions, and protects natural resources. Stanford recycled, composted, and avoided landfill by 62% and 35%, respectively.

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1. The correct answer is C. The reaction goes in the reverse direction for the given reaction at equilibrium at 25°C.

The equilibrium constant (K) for this reaction is very small, indicating that the reaction heavily favors the reactants (N2 and O2) over the products (NO). Therefore, at equilibrium, the reaction will be predominantly in the reverse direction.

2. To increase the yield of C, the volume of the container should be decreased.

According to Le Chatelier's principle, when the volume of a reaction container is decreased, the system will try to compensate by shifting the equilibrium in the direction that produces fewer gas molecules. In this case, decreasing the volume will shift the equilibrium towards the product side, which contains fewer gas molecules (3 moles of gas on the product side vs. 2 moles on the reactant side). Therefore, decreasing the volume will increase the yield of C.

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The millimolar concentration of Al3+ in the solution is 0.045 M.

To find the number of moles of Al2(SO4)3-18H2O, we first need to calculate the mass of 2 grams of this compound. Since the molar mass of Al2(SO4)3-18H2O is 666.44 g/mol, we can calculate the number of moles as follows:

2 g / 666.44 g/mol = 0.003 moles of Al2(SO4)3-18H2O

The aluminum sulfate octadecahydrate fully dissociates in water, and each formula unit yields 3 aluminum ions (Al3+). Therefore, the number of moles of aluminum ions is:

0.003 moles Al2(SO4)3-18H2O x 3 moles Al3+/1 mole Al2(SO4)3-18H2O = 0.009 moles Al3+

The volume of the solution is given as 200 ml, which is equal to 0.2 liters.

Therefore, the millimolar concentration of Al3+ is:0.009 moles Al3+ / 0.2 L = 0.045 M

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This problem is providing the ratio of nitrogen to oxygen by mass in nitrogen monoxide, NO, as 7.0:8.0 and asks for the same ratio but in NO₂ and N₂O₇. After doing the calculations, the results are 7.0:16.0 and 1.0:4.0 respectively.

In chemistry, one can calculate the mass ratios in chemical formulas according to the atomic mass of each atom. In such a way, one knows the mass ratio of nitrogen to oxygen in NO is 7.0:8.0 because we divide the atomic mass of nitrogen by oxygens:

\(\frac{14}{16}=\frac{7.0}{8.0} \)

Now, for chemical formulas with subscripts, one must multiply the atomic mass of the element by the subscript in the formula, which is the case of NO₂ and N₂O₇ as shown below:

\(NO_2:\frac{14}{16*2}=\frac{14}{32} =\frac{7.0}{16.0} \\ \\ N_2O_7:\frac{14*2}{16*7}=\frac{28}{112} =\frac{1.0}{4.0} \)

Therefore, the results for NO₂ and N₂O₇ are 7.0:16.0 and 1.0:4.0 respectively

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Answer:

the protons, neutrons, and electrons that make up the atom?

Explanation:

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 main idea of the excerpt chemistry in centuries is all the matter present are composed of the atoms.

Aristotle declared that only four element exist in nature. They are -

Air, water, earth, fire.

He stated that all matter are composed of these four elements only.

When the atoms reacts, they form a chemical bond. It is defined as a force of attraction which holds the atoms together to form a compound.

Force of attraction is defined as a type of force which keeps two or more objects close to each other, or together no matter how far or close they are in distance.

Two major categories of forces of attraction are - intramolecular forces and intermolecular forces. Intramolecular is the type of forces in atoms which are present internally. While intermolecular is the type of force which is present in two or more elements.

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True is the answer to statement I, and true is the answer to statement II. The relationship between the concentrations of reactants and products of a system at equilibrium is given by the law of mass action.

In other words, the mass action law states that the rate of a chemical reaction is proportional to the concentrations of the reactants. The concentrations of the reactants and products are constant over time when the system reaches equilibrium. The rate of the forward reaction is equal to the rate of the reverse reaction at equilibrium, and there is no net change in the concentration of the reactants and products. When there is a disturbance to an equilibrium system, such as changing the temperature or pressure, the system will shift to re-establish equilibrium.

The two statements given are true, and are in line with the concept of chemical equilibrium. When a chemical reaction reaches equilibrium, the concentrations of the reactants and products no longer change. At equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction, and the equilibrium position can be changed by changing the temperature, pressure, or concentration of the reactants or products. The mass action law is a mathematical equation that relates the concentrations of the reactants and products to the rate of the chemical reaction. The equilibrium constant is derived from the mass action law and is used to predict the position of equilibrium for a chemical reaction.

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Based on the given information, the two reactants that would give the described product via a Suzuki coupling are:

An alkyne where carbon 1 is bonded to a benzene ring and carbon 2 is bonded to hydrogen.

An alkene where carbon 1 is bonded to bromine and carbon 2 is bonded to benzene. The stereochemistry is cis.

The Suzuki coupling is a widely used cross-coupling reaction that involves the palladium-catalyzed cross-coupling of an organoboron compound (such as a boronic acid) with an organic halide or pseudo-halide. In this case, the reactants that can undergo the Suzuki coupling are the alkyne and the cis-alkene described above.

The alkene and alkyne provide the necessary carbon-carbon bond formation, while the benzene rings and hydrogens ensure the desired connectivity in the product. The palladium tetrakis triphenyl phosphine catalyst, heat, and sodium carbonate facilitate the coupling reaction, resulting in the formation of the biaryl product with the specified stereochemistry.

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1. Atomic masses:

Iron (Fe) - 55.845

Sulfur (S) - 32.06

Oxygen (O) - 15.999

2. FeSO3 has:

1 Fe atom = 55.845

1 S atom = 32.06

3 O atoms = 3 * 15.999 = 47.997

3. Add up the atomic masses:

55.845 + 32.06 + 47.997 = 135.902

4. Therefore, the molar mass of FeSO3 is 135.902 grams/mole.

In terms of atoms, the formula FeSO3 shows:

1 Fe atom

1 S atom

3 O atoms

So there are 5 atoms total in each molecule of ferric sulfite (FeSO3).

Let me know if you have any other questions!

The formula for iron pyrite, also known as fool's gold, is \(FeS2.\)

This means that it consists of one iron atom and two sulfur atoms. It is called fool's gold because it has a metallic luster and is often mistaken for real gold by amateur gold miners. Iron pyrite is an important mineral as it is a source of sulfur and also contains iron, which is a valuable metal used in many industries.

However, it is not considered a reliable source of iron as it often contains impurities and is difficult to extract. In addition, it can also cause environmental problems if not properly managed as it can release sulfuric acid when exposed to air and water.

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Answer:

The cooperation of a species is shown throughout history. Including in our history. Where it be physical evolution or technological. We have helped each other with building, advice, locations, Reproduction, etc.

Answer:

detail is given below.

Explanation:

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

For example:

In given photosynthesis reaction:

6CO₂ + 6H₂O  → C₆H₁₂O₆ + 6O₂

The given equation is balanced chemical equation of photosynthesis. There are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.

If equation is not balanced,

CO₂ + H₂O  → C₆H₁₂O₆ + O₂

It can not follow the law of conservation of mass because mass is not equal on both side of equation.

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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yes sure, true it can beee

Answer:

False

Explanation:

Answer:

Rutherford's!

Answer:

The phosphorus first reacts with the bromine or iodine to give the phosphorus(III) halide. These then react with the alcohol to give the corresponding halogenoalkane, which can be distilled off

hope this helps bby<3

Answer:

C. Bonds connecting atoms in reactants break and bonds connecting atoms in products form.

The formal charge on the nitrogen atom in the second resonance form S = C - N is +1/2.

To determine the formal charge on the nitrogen atom for the second resonance form of the given structure (S-C=N), we need to consider the electron pair movement.

In the given structure S-C=N, the nitrogen atom (N) is connected to a carbon atom (C) through a double bond.

To draw the second resonance form, we can move the double bond between the carbon and nitrogen atoms, and simultaneously move the lone pair of electrons on the nitrogen atom to form a new bond with carbon. The resulting resonance form is as follows:

S-C≡N

In this resonance form, the carbon atom forms a triple bond with the nitrogen atom. To determine the formal charge on the nitrogen atom, we use the formal charge formula:

Formal charge = valence electrons - lone pair electrons - 1/2 * shared electrons

The valence electrons for nitrogen is 5, and in this resonance form, it has a lone pair. The shared electrons can be calculated based on the bonding pattern. In this case, nitrogen is sharing a single bond with carbon, so it has one shared electron.

Formal charge on nitrogen = 5 (valence electrons) - 2 (lone pair electrons) - 1/2 * 1 (shared electron) = 5 - 2 - 1/2 = 2 - 1/2 = 1/2

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Answer:

1 mole H2O has 6.02 × 10^23 molecules

Explanation:

The amount of heat gained by the water is 500 calories. Thus, option D is correct.

Given:

Mass of water (m) = 100 g

Change in temperature (ΔT) = 30°C - 25°C = 5°C

The specific heat capacity of water (c) is approximately 1 calorie/gram°C.

Now, the amount of heat gained by the water,

Q = mcΔT

Where:

Q is the heat gained or lost by the substance

m is the mass of the substance

c is the specific heat capacity of the substance

ΔT is the change in temperature

Plugging in the values into the formula:

Q = 100 × 1 × 5

Q = 500 calories

Therefore, the amount of heat gained by the water is 500 calories.

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Explanation:

We can assume that room temperature is 25 °C.

The melting point of a pure substance is the temperature at which it changes state from solid to liquid. The metling point of our substance is -187 °C. Since the room temperature is 25 °C we can say that it won't be solid. At least it will be liquid.

The boiling point of a pure substance is the temperature at which it changes state from liquid to gas. The boiling point of our substance is 42 °C. At room temperature we are under that temperature, so it won't convert into a gas. It will remain as a liquid also.

Since room temperature is between the boiling and melting point of our substance, the physical state is liquid.

Answer: liquid

Answer:

The new volume is 5.0L

Explanation:

Given:

Initial pressure (P₁) = 1.4 atm

Initial volume (V₁) = 2.3 L

Final pressure (P₂) = 0.65 atm

We'll use Boyle's Law:

P₁V₁ = P₂V₂

Substituting the given values:

(1.4 atm)(2.3 L) = (0.65 atm)(V₂)

Now, let's solve for V₂:

V₂ = (1.4 atm * 2.3 L) / 0.65 atm

Calculating this expression step-by-step:

V₂ = (3.22 atm·L) / 0.65 atm

V₂ ≈ 4.953 L

Rounded to one decimal place, the new volume is approximately 5.0 L.

Answer: series circuit

Explanation:

when one bulb burns out the other bulb will go off because the circuit breaks

Answer:D

Explanation:

The Terrestrial Planets. From top: Mercury, Venus, Earth and Mars. The planets Mercury, Venus, Earth, and Mars, are called terrestrial because they have a compact, rocky surface like Earth's terra firma. The terrestrial planets are the four innermost planets in the solar system.

if you work it put you will get the 3rd one I think

Answer:

tha and then you should receive any other

Reheating the test tube can help ensure that the reaction proceeds to completion and that the desired product is obtained.

If the reaction has not fully occurred, it may be because the temperature is not high enough to provide sufficient energy for the reaction to complete.

Reheating the test tube would increase the temperature of the reactants, and this increase in temperature would provide more kinetic energy to the metal and oxygen molecules, causing them to collide with greater frequency and higher energy.

This would increase the likelihood of successful collisions and promote the completion of the reaction.

Thus, it is been directed to reheat your test tube.

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