if i pipet 50.00 ml of 5.026x10^-3 M solution into a 250ml volumetirc flask what is the concentration of the new solution

Explanation:

A colloid is a heterogeneous mixture whose particle size is intermediate between those of a solution and a suspension. The dispersed particles are spread evenly throughout the dispersion medium, which can be a solid, liquid, or gas.

Answer:

The correct rank of cycloalkanes in order of increasing ring strain per methylene is:

Cyclohexane < Cyclopentane < Cyclobutane < Cyclopropane.

Ring strain occurs because carbons in cycloalkanes are sp3 hybridized, so their expected ideal bond is of 109.5°. Therefore in cycloalcanes with angles smaller than 109.5° the potential energy increases.

The correct order is the given above because the shape of the molecules determines the angle between the carbon atoms and the ring strain resulting grows from cyclohexane to cyclopropane.

Answer:

64% because it's higher than 60

Answer:

sup. I have a massive headache

Explanation:

.sup

Hess's law is used to measure the enthalpy of a desired chemical reaction because: D. Intermediate equations with known enthalpies are added together.

Hess's Law is also known as Hess's law of constant heat summation (enthalpy) and it was named after a Swiss-born Russian chemist called Germain Hess.

Hess's Law states that the energy change (enthalpy) experienced in a desired chemical reaction is equal to the sum of the energy changes (enthalpies) in each chemical reactions that it is made up of or contains.

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So,

Ionic compounds tend to be soluble or dissolve in water because water is a polar compound that can exert enough force to overcome the ionic bond and cause the ions to go into solution. In general covalent compounds are less soluble in water. The tendency of compounds to dissociate or ionize in water tells a great deal about the way in which bonds hold the compound itself together. Covalent compounds aren't usually very soluble in water.

When ionic compounds dissolve in water they go through a process called dissociation, splitting into the ions that make them up. However, when you place covalent compounds in water, they typically do not dissolve but form a layer on top of the water.

Answer:

C

Explanation:

C is the right answer for this question.

Answer:

C3H8 + 502+3CO2 + 4H20

Explanation:

In order to get this answer you would have to would balance out the carbons on the products side by multiplying CO2 by 3. The new equation will be 

C3H8 + 02 ----> 3CO2 + H20

Now, that the carbons are balanced, we will look at the hydrogens. We can multiply the number of waters on the product side by 4, to make 4 H20 molecules. This gives both sides of the equation 8 hydrogens. Next we can check our oxygens. There will be 10 oxygens on the products side and 2 on the reactants so to balance these out, we multiply the 02 on the reactants side by 5. 

Balancing a chemical equation is the process of ensuring that the number of atoms of each element in the reactants is equal to the number of atoms of that same element in the products.

Balance the chemical eqations given in the problem?

Chemical equations are used to describe the reactants and products in a chemical reaction. These equations are written using chemical formulas and symbols, indicating the types and numbers of atoms or molecules involved in the reaction. However, these equations must be balanced to obey the law of conservation of mass, which states that the total mass of the reactants must equal the total mass.

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The molar entropy from the question that we have here is 85.1kJ/K.mol as shown.

The molar entropy of a substance can be calculated by dividing the total entropy of the substance by the number of moles present. The entropy of a substance can be determined experimentally by measuring its heat capacity or by analyzing its thermodynamic behavior under different conditions.

We know that;

Entropy = ΔH/T

= 1.6 * 10^4 * 10^3J/mol/187.95 K

= 85.1kJ/K.mol

For the bromide ion;

Rate = 5/1 * 2.7 * 10^-3 mol/s

= 1.35 * 10^-2 mol/s

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Answer:

3.613*10^24 atoms

Explanation:

When the reaction of  Grignard reagent reacted with methanol will yield a tertiary alcohol. Therefore, Option C tertiary alcohol is correct.

Contains a carbon-metal link, Grignard reagents are chemicals used in catalysis. They generally result from the anhydrous reaction of magnesium metal with an alkyl or aryl halide. Because of their high reactivity, Grignard reagents frequently act as nucleophiles in organic reactions.

An alkyl group from a Grignard reagent binds to the oxygen atom of methanol (CH3OH) when it interacts with the methanol, breaking the carbon-metal connection. A precursor alkoxide is created as a result. The equivalent alcohol is then produced by protonating the intermediate alkoxide.

The reaction of a Grignard reagent with methanol leads to the formation of a tertiary alcohol.

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The cost of the patch : = 887.84 cents

Given

16.2 cm² patch

cost = $3.58/in²

Required

The cost of the patch

Solution

We must pay attention to the conversion factor when changing units

1 cm² = 0.155 in²

16 cm² = 2.48 in²

Cost :

= $3.58/in² x 2.48 in²

= $8.8784

1 dollar is equal to 100 cents, so :

= $8.8784 x 100 cents/$

= 887.84 cents

Answer: 4

Explanation: because the zero doesn't count

The concentration of NaOH in molarity is calculated to be equal to 2.186 M.

Concentration of chemical substance expresses the amount of substance present in any mixture.

In a neutralization reaction between NaOH and HCl, the number of moles of HCl will be equal to the number of moles of NaOH.

n(NaOH) = n(HCl)

n is the number of moles.

n(HCl) = M(HCl) x V(HCl)

M is the molarity and V is the volume in liters.

n(HCl) = 0.65 M x 0.037 L = 0.02405 moles HCl

Since the number of moles of NaOH is the same as the number of moles of HCl, we can use the following formula to find the concentration of NaOH:

M(NaOH) = n(NaOH) / V(NaOH)

V(NaOH) = 11.0 mL / 1000 mL/L = 0.011 L

M(NaOH) = n(NaOH) / V(NaOH) = n(HCl) / V(NaOH)

M(NaOH) = 0.02405 moles / 0.011 L = 2.186 M

Therefore, the concentration of NaOH in molarity is 2.186 M.

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Answer:

About 170-180 grams of potassium nitrate are completely dissolved in 100 g.

Explanation:

Hello!

In this case, according to the reported solubility data for potassium nitrate at different temperatures on the attached picture, it is possible to bear out that about 170-180 grams of potassium nitrate are completely dissolved in 100 g; considering that the solubility is the maximum amount of a solute that can be dissolved in a solvent, in this case water.

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Answer:a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes

Explanation:

Answer:

Its a type of cell division that reduces chromosomes.

Explanation:

I believe not 100% sure tho.

Answer:

below the surface

Explanation:

Answer:  Jean Baptiste de Lamarck is a famous biologist known for his theory of evolution. While he is known for his theory of inheritance of acquired characteristics, he also proposed a theory of needs to explain the evolutionary process.

According to Lamarck's theory of needs, animals have specific needs that arise due to changes in their environment. For example, if an animal lives in an area with tall trees, it may need to stretch its neck to reach the leaves for food. Over time, Lamarck believed that this need would cause the animal's neck to lengthen, and this acquired trait would be passed down to its offspring.

One example of Lamarck's theory of needs can be seen in the evolution of the giraffe. Lamarck proposed that the giraffe's long neck evolved due to a need to reach high branches for food. According to his theory, over time, the giraffe's neck lengthened as a result of this need, and this acquired trait was passed down to future generations, eventually resulting in the long-necked giraffes we see today.

However, it is important to note that Lamarck's theory of needs has been largely discredited in modern evolutionary theory, which relies on the principles of natural selection and genetic mutation to explain the process of evolution.

Explanation: i would reallyyyyyyy apreciate brainliest

Answer:

The air smelled like a compound of diesel and gasoline fumes.

The volume of 5.5 grams of carbon dioxide (CO2) at room temperature and pressure is approximately 2.42 dm³.

To calculate the volume of carbon dioxide (CO2) at room temperature and pressure (r.t.p), we can use the ideal gas law equation:

PV = nRT

Where:

P is the pressure

V is the volume

n is the number of moles

R is the ideal gas constant

T is the temperature

At r.t.p, the pressure is typically considered to be 1 atmosphere (atm) or 101.325 kilopascals (kPa). The temperature is approximately 298 Kelvin (K), which is equivalent to 25 degrees Celsius (°C).

First, we need to calculate the number of moles of carbon dioxide (CO2) using its mass and molar mass.

The molar mass of CO2 is calculated by adding the atomic masses of carbon (C) and two oxygen (O) atoms:

Molar mass of CO2 = (12.01 g/mol) + 2*(16.00 g/mol) = 44.01 g/mol

Now, we can calculate the number of moles using the given mass of 5.5 grams:

n = mass / molar mass = 5.5 g / 44.01 g/mol ≈ 0.125 mol

Next, we can rearrange the ideal gas law equation to solve for volume (V):

V = (nRT) / P

Substituting the known values into the equation:

V = (0.125 mol * 0.0821 L·atm/mol·K * 298 K) / 1 atm

V ≈ 2.42 dm³

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By the concept of calculating moles ,it can br concluded that the no. of atoms of phosphorus in 8.80mol of copper(II) phosphate is=1.06\(x10^{25}\)

A mole is defined as amount of substance containing as many as elementary entities that are there in atoms of exactly 12 g of carbon-12.Therefore we can say,1 mole of copper(II) phosphate, Cu3(PO4)2, contains three moles of copper(II) cations and two moles of phosphate anions.

Again 1mole of phosphate anions contains one mole of phosphorus and four moles of oxygen.Considering all these informations we can conclude that:1 mole of copper(II) phosphate contains 2 moles of Phosphorus

Accordingle the sample contains=(8.80\(x\)2) moles of Phosphorus

                                    =(17.6\(x\)Avogadro's constant) atoms of  Phosphorus

                                    =(17.6\(x\)6.022\(x\)\(10^{23}\)) atoms of  Phosphorus

                                    =1.06\(x10^{25}\) [approx] no. of Phosphorus atoms

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In 8.80 moles of copper(II) phosphate, there are approximately 1.06 x 10²⁵ atoms of phosphorus.

The number of atoms of phosphorus in a given amount of a compound can be calculated using the concept of mole in chemistry. Copper(II) phosphate is Cu3(PO4)2, containing 2 moles of phosphorus (P) for every 1 mole of the compound. Avogadro's number (6.022 x 10²³) gives the number of atoms in one mole.

So, if there are 8.80 moles of copper(II) phosphate, there would be 2 × 8.80 moles of phosphorus. Multiplying this by Avogadro's number gives the total number of phosphorus atoms.

Therefore, the number of phosphorus atoms is 2 × 8.80 × 6.022 x 10²³ = 1.06 x 10²⁵ atoms of phosphorus.

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Answer:

V = 268.8 L

Explanation:

Given data:

Number of moles of nitrogen = 12 mol

Temperature = 273 K

Pressure = 1atm

Volume occupy = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

1 atm × V = 12 mol ×0.0821 atm.L/ mol.K   × 273 K

V = 268.95 atm.L / 1 atm

V = 268.8 L

Answer:

20cm3

Explanation:

density = mass/volume, so volume = mass/density

volume = (54g)/(2.7g/cm3)= 20cm3

The volume of the cubic will be 20 \(cm^{3}\).

The volume would be a scalar quantity that describes how much three-dimensional region a closed surface encloses.

Calculation of volume

Given data:

Density = 2.7 g/\(cm^{3}\)

Mass = 54 grams

Volume can be calculated by the formula:

Density = Mass / volume

Put the value of given data in the volume equation.

Volume = 54 g/ 2.7 g/\(cm^{3}\)

Volume = 20 \(cm^{3}\)

therefore, the volume of the cubic will be 20 \(cm^{3}\).

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The half-life of a reaction is the time it takes for the concentration of a reactant to decrease to half its initial value. In a first-order reaction, the rate of the reaction is directly proportional to the concentration of the reactant. This means that the rate of the reaction depends on the concentration of compound A.

To calculate the half-life of compound A, you can use the equation:

half-life = (ln(2)) / k

where k is the rate constant for the reaction.

Plugging in the values given in the question, we get:

half-life = (ln(2)) / 0.45

This simplifies to:

half-life = 1.44 / 0.45

Which gives us a final result of:

half-life = 3.2 hours

So the half-life of compound A at 250°C is approximately 3.2 hours.

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Answer:

unconsolidated material that contains nutrient matter and weathered rock

Explanation:

Earth's crust is made up of many layers. The top is soil, which provides the most nutrients for plants, like hummus( The organic nutrient for soil, form from the decaying of plants and animals)

The soil gets its texture from the bedrock, the bottom layer, which weathers, and goes into the soil.

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Density is the ratio between the mass of a material and its volume (d = m/V) at a given temperature and pressure. For liquids and solids, the most commonly used unit for density is g/cm3 (or g/mL).

Answer: Density = mass/volume

Answer:

if there is one answer, A

If there is 2 answers, A & C

3... A & C & D

Explanation:

To ensure insurance coverage for Percocet, it is essential to verify the patient's insurance coverage and check if prior authorization is required. If prior authorization is necessary, gather the required information, complete the authorization form, and submit it to the insurance company.

When a patient presents a prescription for a medication like Percocet, which requires prior authorization from the insurance company, several steps should be taken:

Verify Insurance Coverage: Check the patient's insurance coverage and confirm if prior authorization is required for Percocet. This can be done by contacting the insurance company or using an online portal provided by the insurer.

Review Prior Authorization Criteria: Understand the specific requirements set by the insurance company for obtaining prior authorization for Percocet. This may include documentation, medical history, and supporting evidence to justify the need for the medication.

Gather Patient Information: Collect relevant patient information, including medical records, diagnosis, and any previous treatments. This information will be used to support the prior authorization request.

Complete Prior Authorization Form: Fill out the necessary prior authorization form provided by the insurance company. Ensure that all required information is accurately entered, including the patient's details, prescriber information, and supporting documentation.

Submit the Request: Send the completed prior authorization form along with any supporting documents to the insurance company. This can be done electronically through their designated channels or by fax/mail, following their specified process.

Follow Up: Monitor the progress of the prior authorization request. Follow up with the insurance company to confirm receipt, inquire about any additional information needed, and track the status of the request.

Inform the Patient: Keep the patient informed about the prior authorization process, estimated timelines, and any potential out-of-pocket costs they may incur.

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