for a 0.15 m solution of (nh4)2so4 what is the concentration of ammonium?

When a drug is administered as a salt, it is typically combined with an appropriate counterion to form a salt form of the drug. This salt form enhances the solubility of the drug in aqueous solutions, which can improve its bioavailability and allow for better dissolution and absorption in the body.

The correct answer is Many drugs are administered as salts rather than as the corresponding neutral compounds because salts often have greater water solubility and stability. This is important for effective delivery and absorption of the drug in the body. Furthermore, salts often provide improved stability compared to the corresponding neutral compounds. The addition of counterions in the salt form can enhance the chemical and physical stability of the drug molecule, protecting it from degradation or hydrolysis.

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Answer:

Molar Mass

Explanation:

Answer: Carbon

Explanation:

electronegativity decreases when you go down a column

The study of chemical bonds is called chemistry.

The correct answer is carbon.

The more negative charge present on an atom shows the electronegativity.

The attraction of the nucleus to the proton is also referred to as electronegativity.

The smaller the radius more the electronegativity.

Hence, the correct answer is Carbon as it has fewer atoms and a smaller radius.

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Answer:

newtons law states that every body in the universe attracts every other body with a force which is directly proportional to the product of their masses and inversely proportional to square of the distance between their centers

Answer:

an object at rest tends to stay at rest

Answer:oml felt

Explanation:

I'm sorry tho

Answer:

800-273-8255

Explanation:

here is the sui cide hotline number

Answer:

Determining whether a ladybug is male or female has nothing to do with the size or number of black spots on the insect's orange body. Both sexes have these spots. The male is generally slightly smaller than the female. The ladybug's reproductive organs share the abdomen, along with the digestive and respiratory organs.

Explanation:

Answer:

Determining whether a ladybug is male or female has nothing to do with the size or number of black spots on the insect's orange body. Both sexes have these spots. The male is generally slightly smaller than the female. The ladybug's reproductive organs share the abdomen, along with the digestive and respiratory organs.

Explanation:

When drawing a Lewis structure, the statements that apply are:

1. In general, the least electronegative atom should occupy the central position in the Lewis structure.
2. Valence electrons must be shown as lone pairs if they are not involved in bonding.
3. For polyatomic cations, add the number of positive charges to the total number of valence electrons.
4. Count the total number of electrons present.
5. For polyatomic anions, add the number of negative charges to the total number of valence electrons.

The least electronegative atom is typically placed in the central position in the Lewis structure. This is because the central atom usually forms the most bonds, and the least electronegative atom is more likely to have a lower electron density, making it a better central atom.

Valence electrons that are not involved in bonding are usually shown as lone pairs in the Lewis structure. This is because lone pairs are unshared electrons and are represented by dots placed around the atomic symbol.

For polyatomic cations, the total number of valence electrons is calculated by adding the number of positive charges (due to loss of electrons) to the total number of valence electrons of the constituent atoms. This is because cations have lost electrons, resulting in a decreased electron count.

Similarly, for polyatomic anions, the total number of valence electrons is calculated by adding the number of negative charges (due to gain of electrons) to the total number of valence electrons of the constituent atoms. This is because anions have gained electrons, resulting in an increased electron count.

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Answer:

Gulls, or colloquially seagulls, are seabirds of the family Laridae in the suborder Lari. They are most closely related to the terns and skimmers and only distantly related to auks, and even more distantly to waders. Until the 21st century, most gulls were placed in the genus

(a) The number of moles of the gas is 0.00032 mol.

The ideal gas law is expressed as :

P V = n R T

Where,

The pressure of the gas is P = 7.74 × 10³ pa = 0.075 atm

The volume of the gas is V = 10.7 mL = 0.0107 L

The number of moles = ?

The temperature in K = 25 + 273 = 298 K

The gas constant is R = 0.0823 atm L / mol K

The number of moles is expressed as :

The number of moles of gas, n = P V / R T

The number of moles of gas, n = ( 0.075 × 0.0107 ) / ( 0.0823 × 298 )

The number of moles of gas, n = 0.00032 mol

The number of moles of gas is 0.00032 mol with the pressure of 0.075 atm.

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Answer:

How many grams Ni in 1 mol? The answer is 58.6934.

We assume you are converting between grams Ni and mole.

You can view more details on each measurement unit:

molecular weight of Ni or mol

The SI base unit for amount of substance is the mole.

1 grams Ni is equal to 0.017037690779543 mole.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between grams Ni and mole.

Type in your own numbers in the form to convert the units!

hope that help

Explanation:

Answer:

0.05  moles

Explanation:

In a mole of any substance, there exist 6.02

⋅   10

^23 units of that substance.

So here, we got:

3.01 ⋅ 10^22 Mg atoms ⋅ 1 mole / 6.02 ⋅ 10^23 Mg atoms

= 0.05  moles

Hope that helps!

That oil sands executive is greedy and heartless and therefore can't be trusted when she claims is Ad hominem attack. So, Option B is correct.

4-  The argument in question 4 is an example of an ad hominem attack. This is due to the argument's focus on the character of the oil sands executuive rather than the actual problem, which is how to improve the company's environmental record.

The argument holds that the executive cannot be believed when she says she wants to improve the company's environmental record because she is avaricious and callous. This is an error in logic, though, as the executive's character may not necessarily be related to the company's environmental policies.

5-  The argument in question 5 is an example of an appeal to ignorance. This is because the argument states that there is no proof that humans are causing climate change, so it must be natural causes. Just because there is no conclusive proof that humans are causing climate change, it does not mean that they are not.

The argument assumes that just because there is no evidence to the contrary, the argument must be true. This is a logical fallacy.

So, Option B is correct.

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Answer:

209.664 grams

Explanation:

The density formula is:

\(d=\frac{m}{v}\)

Rearrange the formula for \(m\) or mass. Multiply both sides of the equation by \(v\).

\(d*v=\frac{m}{v}*v\)

\(d*v=m\)

The mass can be found by multiplying the density and volume. The density of the liquid is 0.768 grams per milliliter and the volume is 273 milliliters.

\(d= 0.768 g/mL\\v=273 mL\)

Substitute the values into the formula.

\(m=d*v\)

\(m=0.768 g/mL * 273 mL\)

Multiply. When multiplying, the milliliters (mL) will cancel out.

\(m= 0.768 g *273\)

\(m=209.664 g\)

m= 209.664 grams

The mass of the liquid is 209.664 grams.

The unknown compound, which has a total mass of 170.00 g, consists of 29.84 g sodium, 67.49 g chromium, and 72.67 g oxygen. Therefore, the empirical formula of this compound is NaCrO₃.

To determine the empirical formula of the compound, we need to find the mole ratios of each element present in the sample.

First, we need to convert the mass of each element to moles. The molar masses of Na, Cr, and O are 22.99 g/mol, 52.00 g/mol, and 16.00 g/mol, respectively.

Number of moles of Na = 29.84 g / 22.99 g/mol = 1.298 mol

Number of moles of Cr = 67.49 g / 52.00 g/mol = 1.298 mol

Number of moles of O = 72.67 g / 16.00 g/mol = 4.542 mol

Next, we need to find the smallest whole-number mole ratio by dividing each of the mole values by the smallest number of moles.

Number of moles of Na = 1.298 mol / 1.298 mol = 1.000

Number of moles of Cr = 1.298 mol / 1.298 mol = 1.000

Number of moles of O = 4.542 mol / 1.298 mol = 3.500

The empirical formula of the compound is NaCrO₃, which represents the simplest whole-number ratio of atoms in the compound.

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The precipitate that will be formed : AgF

One indication of the double displacement reaction is the precipitation reaction

Solubility Rules:  

• 1. soluble compound  

All compounds of Li +, Na +, K +, Rb +, Cs +, and NH4 +  

All compounds of NO₃⁻ and C₂H₃O₂⁻  

Compounds of Cl−, Br−, I− except Ag⁺, Hg₂²⁺, Pb²⁺  

Compounds of SO₄²⁻ except for Hg₂²⁺, Pb²⁺, Sr²⁺, Ba²⁺  

• 2. insoluble compounds  

Compounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li +, Na +, K +, Rb +, Cs +, and NH₄ +  

Compounds of OH− except Compounds of Li +, Na +, K +, Rb +, Cs +, NH₄⁺, Sr²⁺, and Ba²⁺  

Reaction

NaF(aq) + AgNO₃(aq) →NaNO₃(aq)+ AgF(s)

From the solubility rules above, it has been shown that the salts of the Ag⁺ cations are insoluble salts

The principal law governing pollution of the nation’s surface waters is the Federal Water

Pollution Control Act, or Clean Water Act. Originally enacted in 1948, it was totally revised by

amendments in 1972 that gave the act its current dimensions. The 1972 legislation spelled out

ambitious programs for water quality improvement that have since been expanded and are still

being implemented by industries and municipalities.

This report presents a summary of the law, describing the statute without discussing its

implementation. Other CRS reports discuss implementation, including CRS Report R42883,

Water Quality Issues in the 113th Congress: An Overview, and numerous products cited in that

report.

The Clean Water Act consists of two major parts, one being the provisions which authorize

federal financial assistance for municipal sewage treatment plant construction. The other is the

regulatory requirements that apply to industrial and municipal dischargers. The act has been

termed a technology-forcing statute because of the rigorous demands placed on those who are

regulated by it to achieve higher and higher levels of pollution abatement under deadlines

specified in the law. Early on, emphasis was on controlling discharges of conventional pollutants

(e.g., suspended solids or bacteria that are biodegradable and occur naturally in the aquatic

environment), while control of toxic pollutant discharges has been a key focus of water quality

programs more recently.

Prior to 1987, programs were primarily directed at point source pollution, that is, wastes

discharged by industrial and municipal facilities from discrete sources such as pipes and outfalls.

Amendments to the law in that year authorized measures to address nonpoint source pollution

(runoff from farm lands, forests, construction sites, and urban areas), which is estimated to

represent more than 50% of the nation’s remaining water pollution problems. The act also

prohibits discharge of oil and hazardous substances into U.S. waters.

Under this act, federal jurisdiction is broad, particularly regarding establishment of national

standards or effluent limitations. Certain responsibilities are delegated to the states, and the act

embodies a philosophy of federal-state partnership in which the federal government sets the

agenda and standards for pollution abatement, while states carry out day-to-day activities of

implementation and enforcement.

To achieve its objectives, the act is based on the concept that all discharges into the nation’s

waters are unlawful, unless specifically authorized by a permit, which is the act’s principal

enforcement tool. The law has civil, criminal, and administrative enforcement provisions and also

permits citizen suit enforcement.

Financial assistance for constructing municipal sewage treatment plants and certain other types of

water quality improvements projects is authorized under Title VI. It authorizes grants to capitalize

State Water Pollution Control Revolving Funds, or loan programs. States contribute matching

funds, and under the revolving loan fund concept, monies used for wastewater treatment

construction are repaid to states, to be available for future construction in other communities.

Answer:

5

Explanation:

1) List known values

V2: 4952 mL

C2: 1.65

C1: 11.10

V1: ?

2) Set the equation

3) Plug in values en solve for V1.

736.11 mL of solution should be used.

The balanced equation obeys the law of conservation of mass. Here among the given options, the balanced equation is 2Mg + O₂ → 2MgO. The correct option is C.

A chemical equation in which the number of atoms of reactants and products on both sides of the equation are equal is defined as the balanced chemical equation. The amount of reactants and products on the both sides of the equation are equal.

The numbers which are used to balance the chemical equation are called the co-efficient. The coefficient is added in front of the formula. Since it obeys the law of conservation of mass, mass can neither be created nor be destroyed.

Here the balanced equation is:

2Mg + O₂ → 2MgO

The number of 'Mg' and 'O' atoms on both sides of the equation are equal. So it is a balanced equation.

Thus the correct option is C.

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The binding energy of silver-109 (Ag-109) in kJ/mol nucleons is not a well-defined concept, as binding energy is typically calculated for atomic nuclei rather than individual isotopes.

The binding energy of an atomic nucleus is the energy required to completely separate all of its constituent protons and neutrons into individual particles. It is usually expressed in units of energy per nucleon, which is the energy required to separate one proton or neutron from the nucleus.

The average binding energy per nucleon for an atomic nucleus is typically highest for medium-mass nuclei, such as those found in the region of the so-called "valley of stability" on the nuclear chart.

The binding energy per nucleon for silver-109 is not likely to be particularly high, as silver is a relatively heavy element and the binding energy per nucleon tends to decrease with increasing atomic number (Z).

Without more information about the specific calculation being used to determine the binding energy of Ag-109, it is not possible to accurately provide a value for the binding energy in kJ/mol nucleons.

The required masses (g/mol) are also not specified in the question, so it is not clear what context these values might be used in.

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It reduces aldehydes and ketones to their corresponding alcohol.

completed drawed structure is showed in the image below.

The reduction of benzaldehyde and p-anisaldehyde with NaBH4 using an aprotic solvent, tetrahydrofuran (THF), at room temperature has previously been reported . In the example of benzaldehyde reduction, it was reported that the reaction took 17 minutes to complete with a molar ratio of NaBH4/benzaldehyde of 1:1.Sodium borohydride (NaBH4) is a mild reducing agent that is typically used to reduce aldehydes and ketones to their respective alcohols. NaBH4 is sometimes used to reduce esters to alcohols but the reaction is generally slow.

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Rutherford's model of atom could not explain chemical properties as it did not make any mention as to how chemical changes take place.

These properties are defined as those properties which become evident during or after a chemical reaction after the identity of the substance is changed during chemical reaction.

These properties cannot be determined externally just by viewing the substance ,these change immensely after a substance undergoes a chemical change.These are used for identification of unknown substances and for building up chemical classifications.

The major chemical properties are flammability,toxicity,reactivity,acidity and heat of combustion.For a chemical property to be apparent , it is necessary that the structure of the substance is altered.

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The answer is 1.25e-8.

The correct answer is option D.

The statement that formed the basis of Dalton’s atomic theory is atoms are the smallest particles of matter and cannot be divided farther.

In 1808, Dalton presented a theory named atomic theory which suggests that atoms are the smallest particles of an element and it is impossible to divide them further.

According to his theory every element is composed of these tiny particles.

Furthermore, his theory suggests that atoms neither can be divided nor destroyed.

In a particular matter, for example gold, all atoms have similar properties while their mass varies for every single different element.

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The complete question is:

Which of these statements is one of the conclusions that formed the basis of Dalton’s atomic theory?

a. Atoms can only change into atoms of another element through nuclear reactions.

b. Atoms of gases have less mass than atoms of liquids and solids.

c. Atoms of a particular element all have the same number of protons.

d. Atoms are the smallest particles of matter and cannot be divided farther.

Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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The bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

Bond order is defined as the number of electrons in bonding molecular orbitals minus the number of electrons in antibonding molecular orbitals divided by two. As a result, we may determine the bond order of this diatomic particle by the formula: Bond order = (number of bonding electrons - number of antibonding electrons) / 2

Bond order = (8 - 5) / 2

Bond order = 1.5.

This diatomic molecule, according to the bond order, is a stable molecule since the bond order is greater than 1, indicating that it is a double bond. The molecule has an overall bond strength that is greater than a single bond, but not as strong as a triple bond. So therefore he bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

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The number of grams of iron that can be recovered from 25.0g of Fe2O3 can be determined using stoichiometry, which involves the use of balanced chemical equations, molar ratios, and the conservation of mass and atoms. In this case, we want to know the mass of iron that can be obtained from a given mass of Fe2O3, which is a reactant in the chemical equation of the reduction reaction.

Based on the chemical equation of the reduction of Fe2O3 with carbon, the balanced chemical equation is as follows:2 Fe2O3 + 3 C → 4 Fe + 3 CO2The stoichiometric coefficients indicate the number of moles of each substance in the reaction. Therefore, we need to convert the given mass of Fe2O3 into moles and then use the molar ratios to determine the number of moles of iron and its corresponding mass.

Here are the steps involved:1. Calculate the molar mass of Fe2O3:Molar mass of Fe = 55.845 g/molMolar mass of O = 15.999 g/mol Molar mass of Fe2O3 = 2(55.845 g/mol) + 3(15.999 g/mol)Molar mass of Fe2O3 = 159.69 g/mol2. Convert the given mass of Fe2O3 to moles: Moles of Fe2O3 = Mass of Fe2O3 / Molar mass of Fe2O3Moles of Fe2O3 = 25.0 g / 159.69 g/mol.

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Table salt, also known as sodium chloride, is a chemical compound that is made up of the elements sodium and chlorine. Sodium and chlorine, both of which are very reactive, combine to form a stable compound known as table salt. Sodium is a metallic element that is located in Group 1 of the periodic table, while chlorine is a nonmetallic element that is located in Group 17 or 7A of the periodic table.

Table salt is a well-known compound that has a variety of applications, including as a food seasoning, a food preservative, and an ingredient in chemical manufacturing. In addition to its taste-enhancing properties, sodium chloride is essential for maintaining proper fluid balance in the body, aiding nerve and muscle function, and transporting nutrients across cell membranes. Despite its many benefits, excessive intake of table salt can lead to high blood pressure and other health problems. To avoid this, it is recommended that people consume salt in moderation and pay attention to their sodium intake from other sources as well.

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