what is the solubility of silver oxide, , in a solution buffered at ph 10.50? the equilibrium is Ag2O(s)+H2O(l)⇌2Ag+(aq)+2OH−(aq);Kc=2.0×10−8

Measured value 28.7053 cm, which has six significant figures . Round the measurement to four significant figures is 28.71 cm

To count the significant number there are some rules to follow are :

Thus, Measured value 28.7053 cm, which has six significant figures . Round the measurement to four significant figures is 28.71 cm

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Answer:

Answer below. Have a great day!

Explanation:

Observations are used to support a conclusion to an experiment. For example, observations can help determine that the experiment was done correctly. Also, observations can help identify potential problems within the experiment, so that they can be corrected. Results are used to show proof and data from the experiment which would later on be placed in the conclusion.

The principle of faunal succession is a key concept in the study of prehistoric life and the age of sedimentary rocks. It is based on the idea that the fossilized remains of different species of animals and plants found in sedimentary rocks can be used to infer the relative age of the rocks and the conditions that existed when they were formed.

The principle of faunal succession states that over time, the species of animals and plants that lived in a particular area changed and evolved. As a result, the fossilized remains of different species found in sedimentary rocks can be used to infer the relative age of the rocks.

This principle is based on the idea that the fossil record is a record of the evolution of life on Earth. In addition, the principle of faunal succession also provides insight into the ancient environment and climate. For example, the presence of certain types of fossils, such as coral reefs or tropical plants, may indicate that the area was once a warm, shallow sea.

In all, the principle of faunal succession is a powerful tool that connects prehistoric life to the age of sedimentary rocks. By studying the fossilized remains of different species found in sedimentary rocks, scientists can infer the relative age of the rocks and the conditions that existed when they were formed.

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Answer:

E.F= OH

M.F=\(O_{2} H_{2}\)

Explanation:

Empirical Formula

Step 1: Calculate mols of each element

0.44gH(1 mol H/ 1.008g H)= 0.4365 mol H

*note leave extra sig figs for calculations

6.92gO(1 mol O/ 16 g O)=0.4325 mol O

Step 2: Identify which is the smallest mol

*in this case 0.4365 mol H> 0.4325 mol O so we will use 0.4325 mol O

Step 3: Divide above calculations by the smallest mol

0.4325 mol O/0.4325= 1

0.4365 mol H/0.4325= 1.009 *rounds to 1

Step 4: use calculations as subscripts

Oxygen = 1 so the subscript will 1 (O)

Hydrogen = 1 so the subscript will 1 (H)

making E.F= OH

Molecular Formula:

Step 1: identify  molecular mass and mass from the E.F

the molecular mass is given 34.00g/mol

the mass of the E.F is

(oxygen mass from periodic table)+(hydrogen mass from periodic table)

16+1.008= 17.008

Step 2:Divide the molecular mass by the mass given by the emipirical formula.

\(\frac{34.00}{17.008}= 1.999\) round to 2

Step 3:Multiply the empirical formula (the subscripts) by this number to get the molecular formula.  ANSWER: M.F=2(OH)- \(O_{2} H_{2}\)

The standard emf for the given cell reaction is 2.32.

The standard emf calculation and its significance in determining the feasibility of a redox reaction. The standard emf, also known as the standard electromotive force or cell potential, measures the driving force of an electrochemical cell under standard conditions. It represents the potential difference between the two electrodes when they are connected by a conducting medium.

To calculate the standard emf for a cell, we need to use the standard reduction potentials of the half-reactions involved in the overall cell reaction. Table 20.1 provides the necessary data for this calculation. The standard emf of the cell is determined by subtracting the reduction potential of the anode from the reduction potential of the cathode.

In this case, the overall cell reaction is 2Al(s) + 3I2(s) -> 2Al3+(aq) + 6I-(aq). By looking up the standard reduction potentials for the half-reactions of Al and I2 in the table, we find that the reduction potential for Al3+ + 3e- -> Al is -1.66 V, and the reduction potential for I2 + 2e- -> 2I- is 0.54 V.

To calculate the standard emf, we subtract the anode's reduction potential from the cathode's reduction potential: 0.54 V - (-1.66 V) = 2.32 V. Therefore, the standard emf for the cell employing the given overall cell reaction is 2.32 V.

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Answer:

1. provide habitats and shelter for many marine organisms 2. Coral reefs protect coastlines from storms and erosion 3. provide jobs for local communities

Explanation:

Answer:

Coral reefs are home to more species of fish and marine invertebrates than any other habitat in the world. Coral reefs protect beaches and shorelines from the impact of waves. Without coral reefs, beaches and shorelines can be severely damaged or washed away. Corals also produce unique chemicals that have potential uses in medicine.

Explanation:

trust me

Answer:

I think B but I'm not sure.

Answer: Amplitude of the light wave impacts brightness; the wavelength is what impacts/is associated with color.

A change brought about as the result of hydrogenation is the reduction of a compound by adding hydrogen (H₂).

Hydrogenation is a chemical reaction in which hydrogen (H₂) is added to a compound, resulting in a reduction process. This reaction is commonly used in various industrial and biological processes.

During hydrogenation, the unsaturated bonds in a compound, such as carbon-carbon double or triple bonds, are saturated by adding hydrogen atoms. The hydrogen atoms bond with the carbon atoms, forming single bonds and converting unsaturated compounds into saturated compounds.

This process is widely employed in the food industry to convert unsaturated fats and oils into more stable saturated fats. It is also used in the production of various chemicals, such as in the hydrogenation of alkenes to produce alkanes.

Hydrogenation can significantly alter the properties of a compound, including its melting point, boiling point, stability, and reactivity. The addition of hydrogen through hydrogenation can lead to changes in physical and chemical characteristics, making it a valuable tool in numerous applications.

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Your question has been heard loud and clear.

Both scientific laws and scientific theories are not based on hypothesis.

Because , scientific laws are proven and so they are real not hypothetical.

Whereas scientifc theories can be hypothetical.

Thank you

The equation must have the following form to be balanced: 4CO2 + 2H2O = 2C2H2 + 5O2

S8: O2 = 1/8; S8 utilized = 240/8 = 30SO2 generated is equal to the number of sulphur molecules used, which is 240. Stoichiometry is the name given to the study of chemical processes in mathematics. Numerous calculations can be done, such as stoichiometry, which is most usually performed with moles but can also be done with masses and even percentages. Stoichiometric ratio A stoichiometric ratio is important when considering the interactions between specific elements or molecules. This exact ratio of reactant to product coefficients is necessary for a reaction to occur properly. Let's discuss some problems you can run across when you learn about stoichiometry. Chemical Equations in Balance Equations needing to be balanced is a fairly common stoichiometric issue type. This is an essential chemistry skill since a reaction can only occur if the ratio of reactants to products is correct.possess. Additionally, it provides an essential framework for organic chemistry. Balance the ensuing reply: _ CO2 + _ H2O C2H2 + _ O2 To be balanced, equations must have an equal number of each element on both sides of the reaction. Before balancing the oxygen, you can start by balancing the carbons and hydrogens. The equation must have the following form to be balanced: 4CO2 + 2H2O = 2C2H2 + 5O2

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Answer:

The physician William Murrell was one of the first physicians to recognize the the clinical benefits of nitroglycerin in the treatment of the heart disease known as angina pectoris, a type of chest pain caused by reduced blood flow to the heart.

Explanation:

The physician William Murrell was one of the first physicians to recognize the the clinical benefits of nitroglycerin in the treatment of the heart disease known as angina pectoris, a type of chest pain caused by reduced blood flow to the heart. He also used nitroglycerin to treat and reduce high blood pressure. He used small diluted doses of nitroglycerin to treat patients with angina pectoris. Murrell published his treatment results in the article "Nitro-glycerine as a remedy for angina pectoris," in the journal The Lancet in 1879. Thereafter, the use of nitroglycerin as treatment procedure for angina pectoris soon became generally adopted by other physicians.

Nitroglycerin is a vasodilator which is a medicine that opens blood vessels in order to improve blood flow. Nitroglycerine acts to improve blood flow to the heart by opening up or dilating the coronary arteries in the heart, thereby reducing how hard the heart has to work in pumping blood round the body. It reduces preload by  dilating veins and reduces afterload moderately by dilating arteries.

Nitroglycerin comes in two forms: quick-acting forms and long-acting forms.

The quick-acting forms include tablets or oral sprays.

Long-acting forms include pills, tablets, skin ointment, and skin patches.

Photosynthesis removes the most carbon dioxide from the atmosphere.

Trees are particularly adept at storing carbon removed from the atmosphere through photosynthesis, which removes carbon dioxide naturally. The power of photosynthesis, which converts carbon dioxide in the air into carbon stored in wood and soils, can be tapped into when forests are expanded, restored, and managed to encourage more carbon uptake.

Even though forest fires and deforestation reduce forests' net absorption, they still manage to absorb approximately 1.5 times as much CO2 as the United States emits.

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Answer:

When the electrons hit the atoms in the chamber, they cause some of the electrons in the atoms to be stripped or knocked away. ... When one or more electrons is knocked off of an atom, it becomes positively charged. It is now an positive ion. A negative ion can be made by adding an electron to an atom.

Explanation:

Answer: when it gains three electrons

Explanation:

In compounds an atom can have a charge of -3 after another atom gives it 3 more electrons (which are negatively charged) so even when it is gaining and you give it negatively charged atoms it will have a negative charge

Answer:  Hybridization state of carbon in CO₂ is sp.

Explanation:

Hybridization state of carbon in CO₂ is sp hybridized. The two sp hybridized orbitals of the carbon atom overlap with two p orbitals of the oxygen atom to form two sigma σ bonds.

In carbon dioxide (CO2), the carbon atom is sp hybridized.

The carbon atom in carbon dioxide forms two sigma (σ) bonds, one with each oxygen atom. Each oxygen atom is double-bonded to the carbon atom, resulting in a linear molecular geometry for CO2.

To accommodate this linear arrangement, the carbon atom undergoes sp hybridization, which involves the mixing of one s orbital and one p orbital. The hybridization scheme allows the carbon atom to form two sigma bonds with the oxygen atoms, utilizing its two sp hybrid orbitals. The remaining two p orbitals on the carbon atom are perpendicular to the molecular plane and do not participate in bonding.

So, in carbon dioxide, the carbon atom is sp hybridized, resulting in a linear molecular geometry.

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Answer:

Atomic theory is. A

Explanation:

Subject to change if new information is discovered. B. A solution to the problem of differing isotopes. C. Unchanged able D. A descriptive table that lists all of the element

I hope this answered your question.

Answer:

A: The heat added represents an energy change.

Explanation:

Correct on EDG test

According to the given statement is 11.36 g/ml is the density of the object.

The proportion of an object's mass to its volume has been its density. The unit of density is frequently grams per cubic centimeter (g/cm3). Keep in mind that the volume is measured in cubic centimeters, not grams (the same volume as 1 millilitre). More particles will make a box denser than fewer particles in the same box.

Absolute density and relative density are the two main types of density. Relative density, also known as specific gravity, is the proportion of a product's density to the density of a reference material.

Mass  = 125  g

Initial Volume =55.0 mL

Final  Volume = 66.0 mL

Volume = 66.0mL - 55.0mL

Volume= 11.0 mL

ρ = m/v

ρ = 125/11

ρ = 11.36 g/ml.

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Answer:

A control variable

Explanation:

Answer:

Control variable

Explanation:

Answer:

15 L

Explanation:

From the question given above, the following data were obtained:

Initial volume (V₁) = 10 L

Initial pressure (P₁) = 1140 torr

Final pressure (P₂) = 1 atm

Final volume (V₂) =?

Recall:

1 atm = 760 torr

The new (i.e final) volume of the gas can be obtained as follow:

Initial volume (V₁) = 10 L

Initial pressure (P₁) = 1140 torr

Final pressure (P₂) = 760 torr

Final volume (V₂) =?

P₁V₁ = P₂V₂

1140 × 10 = 760 × V₂

11400 = 760 × V₂

Divide both side by 760

V₂ = 11400 / 760

V₂ = 15 L

Therefore, the new volume of the gas is 15 L

The nutrient that is present in the highest amounts in most foods is carbohydrates. Carbohydrates provide the body with energy and are found in a wide variety of foods, including fruits, vegetables, grains, and dairy products.

Carbohydrates are one of the three macronutrients that are essential to human health, along with protein and fat. They are composed of sugars, starches, and fibers and are broken down into glucose, which the body uses as its primary source of energy.

Carbohydrates are found in a wide range of foods, from simple sugars found in fruits and honey to complex carbohydrates found in grains and vegetables.

Carbohydrates are especially abundant in foods such as bread, pasta, rice, and potatoes, which are staples in many diets around the world. Dairy products, such as milk and yogurt, also contain carbohydrates in the form of lactose.

Fruits and vegetables are also good sources of carbohydrates, as they contain natural sugars and fibers that help to regulate blood sugar levels and support digestive health.

While carbohydrates are an important source of energy, it is important to consume them in moderation and to choose complex carbohydrates over simple sugars whenever possible.

This can help to prevent spikes in blood sugar levels and support overall health and wellbeing.

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Answer:

S

Explanation:

The symbol for entropy is S, and a change in entropy is shown as “delta” S or ΔS. If the entropy of a system increases, ΔS is positive. If the entropy of a system decreases, ΔS is negative.

Yes, the polymerization of ethylene units will result in the polymer polyethylene.

What is Polymerization?

Polymerization is the process of connecting smaller molecules (monomers) to form larger molecules (polymers). As a result, polymers are molecules with very high molecular weights made up of repeating units of smaller molecules known as monomers.

Polymers can be formed in a variety of ways, including addition polymerization, condensation polymerization, and co-polymerization.

Addition Polymerization:

It is a polymerization method in which monomers are combined by breaking the double bond and joining them together. The most well-known example of this is polyethylene. In the presence of a catalyst, ethylene undergoes addition polymerization to produce polyethylene.

Polyethylene:

Polyethylene, also known as polythene, is a polymer that is produced through addition polymerization of ethylene. Polyethylene is a polymer that has a high molecular weight, high density, and is resistant to moisture and chemical attacks.

It is a thermoplastic that is commonly used to create plastic bags, bottles, pipes, and other items.

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Answer:

Atomic radii tend to decrease from left to right across a period and increase from top to bottom within a group.

This is because as you move from left to right across a period, the number of protons in the nucleus increases, but the number of electron shells remains the same. This means that the electrons are pulled closer to the nucleus, and the atomic radius decreases. As you move from top to bottom within a group, the number of electron shells increases, while the number of protons in the nucleus remains the same. This means that the electrons are further away from the nucleus, and the atomic radius increases.

Explanation:

Question

Answer

Explanation

Radio Frequency Is one of the electromagnetic frequency waves that lie in the range stretching from below 3 kilohertz to around 300 gigahertz and which includes the frequencies used for communication signals (such as for radio and television broadcasting and cellular telephone and satellite transmissions)

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The Brownstead Lowry base of the equation is PO4^-.

We know that there are several definitions for acid and base. We know that in the case of the Brownstead Lowry definition of an acid and a base. A base would accept the proton while the caid is the specie that would put out the proton.

In this case, we can see that in the compound we have the phosphate ion as the ion that accepted the proton hence that is the Brownstead Lowry base. This can be seen as we look at the equations shown here.

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The number of tablespoons of milk needed for 28 pancakes is determined as 12 tablespoons.

option C is the correct answer.

The number of the tablespoons of milk that would be needed is calculated by applying simple proportion method.

3 tablespoons of milk for 7 pancakes;

3 -----------> 7

? tablespoons of milk for 28 pancakes;

? --------------------> 28

Combine the two equations and solve for the number of tablespoons needed as follows;

? = ( 3 x 28 ) / 7

? = 12

Thus, The number of tablespoons of milk needed for 28 pancakes is determined by applying simple proportion.

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UV radiation This wave, which has a wavelength ranging from 10 nm to 400 nm, is visible in sunshine.

The following transitions are ranked from lowest to highest in terms of energy, wavelength, and frequency 2 to 1\s 6 to 4 8 to 3 An transition is what? An electron in a hydrogen atom can absorb a photon moving from a lower to a higher energy level, according to the Bohr model of the atom. This is what we mean when we talk about the electron in the atom becoming excited. Now that we are aware that electrons can go from one energy level to another and vice versa, we can use this information to describe the spectrum of the hydrogen atom. The energy of each transition depends on the distance between the transitions.

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To find the molar mass of gas Y, we'll consider the given mass, volume, and the terms "mass", "gas", and "molar".

Molar Mass is also defined as the mass of a substance in grams contained within one mole of the supplied component.

A mole is the amount of molecules of a substance that are present in the supplied substance.

The number of molecules or atoms on any mole is fixed at 6.02214076 1023. Molar mass is measured in grams per mole.

Here's the step-by-step explanation:

1. We're given the volume of gas Y as 1.12 liters and its mass as 6.23 g at STP (Standard Temperature and Pressure).
2. At STP, 1 mole of any gas occupies 22.4 liters.
3. To find the number of moles of gas Y, divide the given volume by the volume of 1 mole of gas at STP: 1.12 L / 22.4 L/mol = 0.05 mol.
4. Now, to calculate the molar mass of gas Y, divide the given mass by the number of moles: 6.23 g / 0.05 mole = 124.6 g/mol.

The closest answer to 124.6 g/mole is 125 g/mole, so the molar mass of gas Y is:

C) 125 g/mole

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To calculate the mole fraction of acetone (C3H6O2) in a solution of water where equal masses of both compounds are present, we first need to determine the number of moles of each compound.
Since the masses are equal, we can assume that each compound has a mass of 50 grams (100g total). The molar mass of acetone is 58.08 g/mol, so 50 g of acetone is equal to 0.861 moles (50 g / 58.08 g/mol).
Therefore, the mole fraction of acetone in the solution is 0.237, which corresponds to answer choice (b).

To calculate the mole fraction of acetone (C3H6O) in a solution with equal masses of acetone and water, we first need to determine the moles of each substance.
The molecular weight of acetone is 58 g/mol (12*3 + 1*6 + 16), while the molecular weight of water is 18 g/mol (1*2 + 16).
Assuming 100 g of the solution, we have 50 g of acetone and 50 g of water (equal masses). To find the moles, we use the formula moles = mass/molecular weight:
Moles of acetone: 50 g / 58 g/mol = 0.862 moles
Moles of water: 50 g / 18 g/mol = 2.778 moles
Now, we can calculate the mole fraction of acetone using the formula mole fraction = moles of component / total moles:
Mole fraction of acetone: 0.862 moles / (0.862 + 2.778) moles ≈ 0.237
Therefore, the mole fraction of acetone in the solution is approximately 0.237, which corresponds to option b.

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To prepare 128.2ml of a 0.364 M aqueous solution of NaCl.the mass in grams, of NaCl need to use to make the solution is 2.723 gm.

Molarity is defined as the no. of moles of solute per liter of solution.

Here,

Molarity =  moles of solute / Liter of solution

0.36 M solution will contains 0.364 moles of NaCl.

therefore, volume of solution in L =  ( 128.2 / 1000 ) L × 1 L

                                                 = 0.1282 L

that means, it will contain, no. of moles of NaCl

= (0.1282 L of solution × 0.364 ) / 1 L of solution      

= 0.0466 moles of NaCl

now, molar mass of NaCl  = 58.44 g/mol    

so, 1 mol of NaCl has a mass of  58.44 g/mol

therefore, 0.0466 moles of NaCl will have mass of

= ( 0.0466 moles of NaCl × 58.44 g ) / 1 mole of NaCl

= 2.723 g

Thus,To prepare 128.2ml of a 0.364 M aqueous solution of NaCl .the mass in grams, of NaCl need to use to make the solution is 2.723 gm.

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