after analysis, you determine that the total molecular weight of a polymer sample is 2,000,000 g/mol with 1,000 polymer molecules making up the material. what is the number weighted average molecular weight of this polymer in g/mol?

Answer:

5.52

Explanation:

2.76 10^-3 M = 2.76mM

2.76mM*2L= 5.52mmol

All of the given chemical equations, A, B, C, and D, are balanced. The chemical equation 2CO + 2NO → 2CO2 + N2 is balanced. The number of atoms of each element is the same on both sides of the equation.

B. The chemical equation 6CO2 + 6H2O → C6H12O6 + O2 is balanced. The number of atoms of each element is the same on both sides of the equation.

C. The chemical equation H2CO3 → H2O + CO2 is balanced. The number of atoms of each element is the same on both sides of the equation.

D. The chemical equation 2Cu + O2 → 2CuO is balanced. The number of atoms of each element is the same on both sides of the equation.

Therefore, all of the given chemical equations, A, B, C, and D, are balanced.

To learn more about chemical equations click here:

brainly.com/question/26603502

#SPJ11

A 50-mL vial of SENSORCAINE/EPINEPHRINE solution contains approximately 0.25 mg of epinephrine. This is calculated based on the concentration of 1:200,000 w/v in the solution.

To determine the amount of epinephrine (mg) in a 50-mL vial of SENSORCAINE/EPINEPHRINE solution, we need to consider the concentration of epinephrine in the solution. The solution contains 1:200,000 w/v epinephrine, which means that for every 1 part of epinephrine, there are 200,000 parts of the solution.

To calculate the amount of epinephrine in the solution, we can use the following formula:

Amount of epinephrine = Total volume of solution (mL) × Concentration of epinephrine (mg/mL)

In this case, the total volume of the solution is 50 mL, and the concentration of epinephrine is 1:200,000 w/v. To convert the concentration to mg/mL, we divide 1 mg by 200,000 mL:

Concentration of epinephrine (mg/mL) = 1 mg / 200,000 mL = 0.000005 mg/mL

Finally, we can calculate the amount of epinephrine in the 50-mL vial:

Amount of epinephrine = 50 mL × 0.000005 mg/mL = 0.00025 mg

Rounding to the nearest hundredth, the amount of epinephrine in a 50-mL vial of SENSORCAINE/EPINEPHRINE solution is 0.25 mg.

To know more about EPINEPHRINE ,

https://brainly.com/question/28165898

#SPJ11

Compound A is likely an organic halide, Compound B is a derivative of benzene, Compound C is benzene itself, and Compound C can be converted into toluene through a Friedel-Crafts alkylation reaction.

i) Compound A is an alkene.

When heated with silver powder, it undergoes oxidative cleavage to produce Compound B which is an aldehyde.

So the IUPAC names of Compound A and Compound B are ethene and ethanal, respectively.

ii) The acidic nature of Compound B can be proved by treating it with sodium hydrogen carbonate. If effervescence occurs, it is due to the evolution of carbon dioxide gas.

This indicates that Compound B is acidic in nature and reacts with a base to form salt and water.

iii) When Compound C (Benzene) reacts with bromine in the presence of catalyst FeCl3, Bromine water is decolorized to form a colorless solution.

This is an addition reaction that occurs due to the presence of an electron-rich benzene ring.

iv) Compound C (Benzene) can be converted into Toluene (Methylbenzene) through a process known as Friedel-Crafts Alkylation, where Benzene is allowed to react with Chloromethane (Methyl chloride) in the presence of Lewis acid catalyst, Aluminum chloride (AlCl3).

The resulting product is then heated to obtain Toluene (Methylbenzene).

The chemical reaction for the conversion of Benzene to Toluene is given below:C6H6 + CH3Cl → C6H5CH3 + HCl

For such more questions on Friedel-Crafts

https://brainly.com/question/30900581

#SPJ8

Correct Answer: Boron family

Answer:

185K

Explanation:

After the molecules mix, they reach a thermal equilibrium.....

Teq =(T1 + T2)/2 =(100+300)/2 =200K

since 185K is closer to 200K than the other options... Therefore the possible equilibrium temperature is 185K

We are given an initial temperature of the system, T1, as:

T1 = 300 K

After the divider is removed, the system will reach thermal equilibrium. According to the second law of thermodynamics, heat will flow from the hotter object to the colder object until the temperatures equalize.

This means the final temperature of the system after the divider is removed will be somewhere in between the initial temperatures of the two parts.

So considering the four answer choices:

A) 100 K - This is too low, the final temperature will be higher than 100K

B) 75 K - Also too low

C) 325 K - This is the initial temperature of one part, so the final temperature cannot be 325K

D) 185 K - This is a plausible final temperature in between 100K and 300K

Therefore, the answer is likely to be D) 185 K

In short, the key points are:

Heat will flow from the hotter to colder object until temperatures equalize

The final temperature will be somewhere in between the initial temperatures of the two parts

Answer choices A,B and C are too low or the same as one of the initial temperatures

Only D) 185K is a plausible intermediate temperature between 100K and 300K

The correct option is b) (i) electronegativity, (ii) Pauling, (iii) 4.0, (iv) increases, (v) decreases.

The ability of an atom to attract shared electrons to itself is called electronegativity. It is generally measured on the Pauling scale. An arbitrary value of 4.0 is assigned to fluorine, which has the greatest ability to attract electrons. Electronegativity generally increases across a period (from left to right in the periodic table) and decreases down a group (top to bottom). This is because the effective nuclear charge increases across a period, making it harder for electrons to be pulled away from the nucleus, whereas down a group, the increasing distance between the nucleus and valence electrons reduces the attraction between them.

Learn more about electron here: brainly.com/question/12001116

#SPJ4

Complete question:

Fill in the blanks with the appropriate option. The ability of an atom to attract shared electrons to itself is called (i). It is generally measured on the (ii) scale. An arbitrary value of (iii) is assigned to fluorine (have greatest ability to attract electrons). It generally (iv) across a period and (v) down a group.

a) (i)polarity, (ii)Pauling, (iii)2.0, (iv)decreases, (v)increases

b) (i)electronegativity, (ii)Pauling, (iii) 4.0, (iv) increases, (v)decreases

c) (i)valency, (ii)Mulliken, (iii)1.0, (iv) decreases, (v)increases

d) (i)electron affinity, (ii)Mulliken, (iii)2.0, (iv)increases, (v)increases

The mass of iron sample will be 585 grams.

According to the question,

Density of iron sample = 7.80 g/cm³

Volume of water displaced = 75.0 ml

1 ml = 1 cm³

Therefore, 75 ml = 75 cm³

Density is defined as the mass (m) of a substance per unit volume (V). It can be generally denoted by ρ. Therefore, ρ = m/V.

Mass is the amount of matter present in a substance. Volume is the 3-D space occupied by a substance.

In the given question density and volume are provided and to find the value of mass, the formula can be rewritten as: m = ρ × V.

Hence, m = 7.80 g/cm³ × 75 cm³

            m = 585 grams.

To know more about density, here

brainly.com/question/15164682

#SPJ4

Answer:

it is true

Explanation:

Aeration basins increase the rate of bacteria working to break down the organic matter in wastewater is true.

Aeration basins is defined as the biomass consumes both oxygen and organic pollution, resulting in net microorganism growth and carbon dioxide release.

It can also be defined as the process of introducing air into wastewater in order to allow aerobic bio-degradation of pollutant components.

Aeration is frequently used to reduce the amount of carbon dioxide released by a treatment process.

It is the best methods for waste water treatment .

The main disadvantage of the aeration process is that too much oxygen is absorbed and the water becomes corrosive.

Thus, aeration basins increase the rate of bacteria working to break down the organic matter in wastewater is true.

To learn more about aeration basins, refer to the link below:

https://brainly.com/question/27784513

#SPJ5

Answer:

Water molecules pull the sodium and chloride ions apart

Explanation:

A weak base, such as sodium cyanide (NaCN) or potassium cyanide (KCN), must be added to the hydrocyanic acid solution in order to form a buffer.

The hydrocyanic acid and weak base will combine to generate a weak acid and its conjugate base. The weak acid will then function as a buffer solution along with its conjugate base. The reaction's chemical equation is as follows:

HCN + CN⁻ ⇌ HCN + CN⁻

When moderate amounts of strong base are added to the buffer solution, the weak acid will react with the strong base to form the conjugate base of the weak acid. This reaction will consume the added strong base and prevent the pH of the buffer solution from changing significantly. The chemical equation for the reaction is:

HCN + OH⁻ ⇌ CN⁻ + H₂O

To calculate the pH of the buffer solution, you can use the Henderson-Hasselbalch equation:

pH = pKa + log([A⁻]/[HA])

where pKa is the acid dissociation constant, [A⁻] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.

To know more about a buffer solution, refer:

https://brainly.com/question/27371101

#SPJ4

Correct question is:

Given a solution of hydrocyanic acid (HCN), what additional regent or reagents are needed to prepare a buffer from hydrocyanic acid solution? Explain how this buffer solution resists a change in pH when moderate amounts of strong acid are added. Use a chemical equation in your explanation.

The mass of oxygen gas produced, given that 15.8 g of potassium permanganate is heated until no more oxygen gas is given off is 1.6 g

From the question given, the following data were obtained:

The mass of oxygen gas produced from the reaction can be obtained as follow:

Mass of potassium permanganate = Mass of remaining substance + mass of oxygen

Inputting the given parameters, we have:

15.8 = 14.2 + mass of oxygen

Collect like terms,

Mass of oxygen = 15.8 - 14.2

= 1.6 g

Thus, we can conclude that the mass of oxygen gas produced from the reaction is 1.6 g

Learn more about mass produced:

https://brainly.com/question/9526265

#SPJ1

Answer:

Acids: react with metals, taste sour

Both: can cause burns, conduct electricity

Basis: react with nonmetals, taste bitter

Explanation:

This is the right answer

Answer:

Acids: react with metals, taste sour

Both: can cause burns, conduct electricity

Basis: react with nonmetals, taste bitter

it's right, I did it.

Answer:

6.875 moles of Carbon Dioxide

Explanation:

110 grams CH4 / 16 molar mass = 6.875 moles

There are  1.2 hr would this current have to be applied to plate out 7. 20 g of iron .

Calculation ,

Given ; Current ( I ) = 5. 68 A

In \(Fe(NO_{3} )_{2}\) , the valancy of Fe is +2 .

2 moles of \(e^{-}\) are required for the decomposition of 1 mole of Fe .

7. 20 g  of Fe in moles  = 7. 20 g /55.845 g/mol =0.12 mole

x moles of  \(e^{-}\) are required for the decomposition of 0.128 mole of Fe .

moles of   \(e^{-}\) are required = 0.256 moles

Charge on 1 mole  of   \(e^{-}\) = 96500 C

Charge on 0.256  mole  of   \(e^{-}\) = 24704 C

Current ( I )= Q/t  

t =Q / I = 24704 C/5. 68 A = 4349 sec = 1.2 hr

Therefore , there are  1.2 hr would this current have to be applied to plate out 7. 20 g of iron .

To learn more about iron

https://brainly.com/question/18500540

#SPJ4

Answer:

1. Mixtures

2. Solutions

3. Heterogeneous

4. Sand-water

5. Salt-water mixture

6. Water

Explanation:

1. Indeed, Matter could exist and substances or Mixtures, which is also subdivided into two.

2. These substances can also be in the form of solutions.

3. Heterogeneous on the other hand refers to mixtures that are not totally uniform such as Sand-water.

4. Sand-water are good examples of Heterogeneous mixtures.

5. Salt-water mixture falls under the category of homogeneous mixtures as they are totally uniform.

6. Water is also an example of a homogeneous mixture because basically two elements Hydrogen and Oxygen combine uniformly to form water.

Long term (current) utilisation anticoagulants, ICD-10 code Z79. 01, is a medical classification listed by WHO under the range - Factors that affect the medical status and contact with healthcare.

In the United States, acceptance of ICD-10-CM was slow. Since 1979, the United States has required ICD-9-CM codes[2] for Medicare and Medicaid reimbursement claims, and indeed the majority of the American medical industry has followed suit.

ICD-10 (without diagnostic and therapeutic extensions) was implemented for reporting mortality on January 1, 1999, but ICD-9-CM was still in use for morbidity. Meanwhile, the WHO granted the National Center for Health Statistics (National center for education statistics) of the United States permission to develop a clinical modification of the ICD-10.

The US Centers for Medicare and Medicaid Services (HHS) proposed a novel code sets for reporting treatments and methods on healthcare purchases on August 21, 2008. The ICD-9-CM code configurations would be replaced by ICD-10-CM code sets on October 1, 2013, according to the proposal.

Learn more about the ICD-10 code here

https://brainly.com/question/14819864?referrer=searchResults

#SPJ4

The correct answer is c. salt bridge. The salt bridge is also known as an ionic bond or an ionic interaction.

When two side chains containing an amino group and a carboxyl group are in close proximity, they can form a salt bridge. A salt bridge is a type of interaction that occurs between an acidic group (carboxyl group) and a basic group (amino group) when they come close together. The carboxyl group, which has a negative charge at physiological pH, can attract and interact with the positively charged amino group. This electrostatic interaction between the opposite charges forms a salt bridge. The salt bridge is also known as an ionic bond or an ionic interaction.

Learn more about salt bridge here:

https://brainly.com/question/31647962

#SPJ11

It should be at beginning. A hypothesis is called an educated guess of what might happen in the experiment.

Please brainliest

Answer:

false

Explanation:

Size of an atom increases as we move down a group and from left to right across a period

Define an atom?

An atom is a unit of matter that specifically characterizes a chemical element. One or more negatively charged electrons surround the core nucleus of an atom, which is made up of all of them. One or more protons and neutrons, which are comparatively heavy particles, can be found in the positively charged nucleus.

In a group, as the atomic number rises, the atomic size expands from top to bottom. Valence electrons are located farther from the nucleus because there are more filled energy levels, which increases atomic size.

Atomic size grows as a function of period number, number of shells, and so forth. Since there are more electrons in each shell as we move from left to right in a period, the force of attraction between the nucleus and electrons, which have positive charges, is stronger, bringing the shells closer to the nucleus and shrinking the size of the atom.

To know more about atomic number use link below:

https://brainly.com/question/11353462

#SPJ1

Answer:

47.867

Explanation: It's Titanium because the atomic number is the number of protons.

Answer:

2682.9J is the heat absorbed by the wood

Explanation:

To find the heat absorbed for a material we must use the equation:

Q = S*m*ΔT

Where Q is heat absorbed in Joules

S is specific heat of the material = 1.76J/g°C for wood

m is the mass of the material = 41.2g

ΔT is change in temperature = 65.1°C - 28.1°C = 37.0°C

Replacing:

Q = 1.76J/g°C*41.2g*37.0°C

Q = 2682.9J is the heat absorbed by the wood

Answer:

Repetition

Explanation:

In the world of science, experiments are regularly conducted to test out hypotheses. These experiments are however, not conducted by scientist once to derive a result. They are rather conducted multiple times (repeated) to ascertain the accuracy i.e not as a result of random occurrence. The experiments that undergo multiple trials are said to undergo REPETITION.

This is the case of the scientist in this question, who is conducting an experiment to test what temperature causes the fastest growth rate in sunflower plants. He conducted the experiment multiple times, making it an example of REPETITION.

N.B: Replication is when the experiment is re-conducted by another scientist to see if same result is derived.

(omg, your in high school, but I'm in middle school but I have this same question lol.)

There would be an advantage for flowers that attract only one type of pollinator and excude others because the flower could be harmed by the pollinator. The flower could have a natural defense against certain species of animals to avoid things like getting completely eaten or getting a virus from an infected species. The disadvantage would be that some species that the flower needs might avoid the flower because of natural defense.

I hope this helps! Sorry if it doesn't because I'm only in middle school.    

If a plant has a specific pollinator, a good relationship evolves between the plant and the insect. If the plant becomes extinct, the plant also becomes extinct.

Pollination is the process by which pollen grains are transferred from the anther to the stigma of a flower. It is normally carried out by the agents of pollination such as wind, insects etc.

If a flower only has a specific pollinator, it is much easier for the plant to be pollinated because the pollinator evolves a good relationship with the plant.

However, if that specific pollinator happens to become extinct, that plant also becomes extinct because there will be no other pollinator for the plant specie.

Learn more about pollination: https://brainly.com/question/1675149

Answer:

1. Boyle's law

2. Charle's law

3. Ideal Gas law

Explanation:

Option (A) is correct. CaSO4 is most soluble in water rather than 1.0M CaCl2(aq.). This is according to the concept of Common ion effect and solubility.

The solubility product of CaSO4 Ksp = 3x10-5

CaSO4 is sparingly soluble in water and this equilibrium is setup between the solid and its ions in solution.

if we add 0.5M K2SO4 solution, the sulfate ion (SO4-2) is the common ion to both of them. this is the origin of the term "common ion effect". according to Lech atelier's principle , the position of equilibrium would shift in order to count what have just done.  in this case, it would tend to remove sulfate ion (SO4-2) by making extra solid calcium sulfate. hence it will less soluble and the concentration of calcium ions in the solution  will decrease. 

similarly , if we add 1.0M CaCl2, it will less soluble and the concentration of sulfate ions (SO4-2)  in the solution will decrease.

To learn more about Solubility please visit:

https://brainly.com/question/23946616

#SPJ4

The following formula can be used to determine how many moles of KC1 are present in 1250 mL of 0.75 M KC1: Molarity (M) is equal to the moles of solute per litre of solution.

In this instance, the volume of the solution is 1250 mL, and the molarity of KC1 is 0.75 M. The following formula can be used to determine how many moles of KC1 are present in 1250 mL of 0.75 M KC1: Molarity (M) times the number of litres in the solution equals 0.75 M times (1250 mL/1000 mL/L) or 0.9375 moles of KC1.

Consequently, 0.9375 moles of KC1 are present in 1250 mL of 0.75 M KC1. It is significant to remember that a solution's molarity is a measurement of the amount of a solute present in a given volume of the solution.

Learn more about molarity   at:

https://brainly.com/question/8732513

#SPJ1

The standard enthalpy of reaction (ΔH∘rxn) is 1182 kJ/mol.

What is standard enthalpy?

Standard enthalpy refers to the enthalpy change that occurs in a chemical reaction under standard conditions. It is often measured in units of energy, such as joules (J) or kilojoules (kJ).

The standard enthalpy of formation (ΔH∘f) values for the compounds involved in the reaction are:

ΔH∘f(Ag2S) = -32.6 kJ/mol

ΔH∘f(H2O) = -285.8 kJ/mol

ΔH∘f(Ag) = 0 kJ/mol

ΔH∘f(H2S) = -20.6 kJ/mol

ΔH∘f(O2) = 0 kJ/mol

Now, we can substitute these values into the equation:

ΔH∘rxn = ΣnΔH∘f(products) - ΣmΔH∘f(reactants)

ΔH∘rxn = (4 * 0 kJ/mol + 2 * (-20.6 kJ/mol) + 1 * 0 kJ/mol) - (2 * (-32.6 kJ/mol) + 2 * (-285.8 kJ/mol))

Simplifying the equation:

ΔH∘rxn = -41.2 kJ/mol + 651.6 kJ/mol + 571.6 kJ/mol

ΔH∘rxn = 1182 kJ/mol

Therefore, the standard enthalpy of reaction (ΔH∘rxn) for the given reaction is 1182 kJ/mol.

To learn more about standard enthalpy,

https://brainly.com/question/1621852

#SPJ4

Marxist criticism situates a piece of literature within the framework of class and underlying class presumptions.

Get over yourself and quit being such a downer all the time, please! Include advice on what the person should do differently in the future. For instance, "I would appreciate it if you were able to approach constructive criticism with a positive attitude instead of believing I'm incorrect all the time.

While criticism is required for improvement, it's crucial to be able to do so without being unfavorable. Although some people view criticism as a filthy word, keep in mind that nothing in life is flawless, and that the only way to make something better is to identify and fix its flaws.

To know more about Criticism visit:

https://brainly.com/question/8936925

#SPJ4