what volume of a 6.0 solution of ethanol contains 3.0 g of ethanol

Answers

Answer 1

Volume of a 6.0 solution of ethanol that contains 3.0 g of ethanol is 0.50 L. Amount of ethanol (in moles) = 3.0 g / 46 g/mol = 0.0652 mol Volume of solution = Amount of substance (in moles) / Concentration of solution= 0.0652 mol / 6.0 M = 0.0109 L = 10.9 mL

Given ,Amount of ethanol = 3.0 g Concentration of ethanol solution = 6.0 MWe know, Amount of substance (in moles) = Mass of substance / Molar mass of substance Molar mass of ethanol = 46 g/mol.

Amount of ethanol (in moles) = 3.0 g / 46 g/mol = 0.0652 mol Volume of solution = Amount of substance (in moles) / Concentration of solution= 0.0652 mol / 6.0 M = 0.0109 L = 10.9 mL Therefore, volume of a 6.0 solution of ethanol that contains 3.0 g of ethanol is 0.50 L.

To know more about solution visit:

https://brainly.com/question/1416865

#SPJ11


Related Questions

Name the following covalent molecules:
SeF

Answers

Answer:

do you mean DeF?

Explanation:

Find the density of a substance that’s had a volume of 24.7mL and a mass of 49.1g. Give the answer with two decimals.

Answers

Answer:

1.99 g/mL

Explanation:

Use the formula d = m/v, where m is the mass and v is the volume.

Plug in the values:

d = 49.1/24.7

d = 1.99 g/mL

Answer:

About 1.99 g/mL

Explanation:

The density of a substance can be found using the following formula:

d= m/v

where m is the mass and v is the volume.

The mass of this substance is 49.1 grams and the volume is 24.7 milliliters.

m= 49.1 g

v= 24.7 mL

Substitute these values into the formula.

d= 49.1 g / 24.7 mL

Divide 49.1 g by 24.7 mL

d= 1.98785425 g/mL

We are asked to round to two decimal places, or the hundredth place. The 8 in the thousandth place tells us to round the 8 to a 9 in the hundredth place.

d ≈ 1.99 g/mL

The density of the this substance is approximately 1.99 grams per milliliter.

the third law of thermodynamics describes the entropy of a: select the correct answer below: solid liquid gas all of the above

Answers

The third law of thermodynamics describes the entropy of a: solid.

The third law of thermodynamics states that the entropy of a pure crystalline substance approaches zero as the temperature approaches absolute zero (0 Kelvin or -273.15 degrees Celsius). This law implies that at absolute zero, a perfectly ordered and pure crystalline solid will have zero entropy.

The third law of thermodynamics is not specific to liquids or gases but applies to solids. In a solid, the molecules are highly ordered and have fixed positions in a regular lattice structure. As the temperature decreases towards absolute zero, the thermal motion of the molecules reduces, and the system becomes more ordered, resulting in a decrease in entropy.

In contrast, liquids and gases have higher entropy compared to solids at absolute zero because their molecules have more freedom of movement and are not as tightly arranged. Therefore, the third law of thermodynamics specifically addresses the entropy of solids and does not apply to liquids or gases.

To learn more about law of thermodynamics, here

https://brainly.com/question/1368306

#SPJ4

Calculate the volume of a cube with the following measurements length= 5cm height =10 cm width=16 cm

Calculate the volume of a cube with the following measurements length= 5cm height =10 cm width=16 cm

Answers

Answer:

800 cubic cm

Explanation:

Select the atoms that belong to the same element.

16 protons 16 neutrons 16 electrons
11 protons 10 neutrons 11 electrons 13 protons 14 neutrons 13 electrons. 14 protons 14 neutrons 14 electrons. 11 protons 12 neutrons 11 electrons

Answers

Explanation:

please structure your question correctly so that we can answer.

Answer:

Cant answer until its wrote correctly

Explanation:

Because its not stated properly

How many moles of KNO3 are in 500.0 mL of 2.0 M KNO3?

Answers

There is 1.0 mole of KNO₃ in 500.0 mL of a 2.0 M KNO₃ solution.

To determine the number of moles of KNO₃ in 500.0 mL of a 2.0 M KNO₃ solution, we need to use the equation:

moles = concentration (M) × volume (L)

Since 1 liter is equal to 1000 milliliters, we divide 500.0 mL by 1000 to get 0.5 L.

Next, we substitute the values into the equation:

moles = 2.0 M × 0.5 L

The concentration of 2.0 M indicates that there are 2.0 moles of KNO₃ in 1 liter of the solution. Therefore, multiplying the concentration (2.0 M) by the volume (0.5 L) gives us the number of moles of KNO₃:

moles = 2.0 M × 0.5 L = 1.0 mol

Hence, there is 1.0 mole of KNO3 in 500.0 mL of a 2.0 M KNO₃ solution.

know more about volume here:

https://brainly.com/question/29796637

#SPJ8

(d) Caesium is another element in Group 1 of the Periodic Table.
(i) The table below lists some statements about the reaction of caesium with
cold water compared to the reaction of lithium with cold water.
Place ticks (✓) in the boxes to show the two correct statements.
the reaction with caesium is more vigorous
the reaction with caesium produces a different gas
the reaction with caesium produces an acidic solution
the reaction with caesium produces a different compound
the reaction of caesium is endothermic

Answers

Answer: The reaction with caesium is more vigourus.

The reaction with caesium produces different compund.

Explanation:

Cold water and cesium react to produce hydrogen gas and a mixture of cesium and hydroxide ions as byproducts.

How can light help us understand atoms?

Answers

Answer: We can calculate the energy levels of an atom

Explanation:

Spectral lines tell us how many different energy levels an atom has, and how far apart those energy levels are spaced.This is possible because spectral lines are the result of an excess (emission lines) or deficiency (absorption lines) of observed photons emitted from certain types of matter. The lines are caused by electrons moving between energy levels within individual atoms. Since each element emits it's own unique spectrum, this means that different types of atoms must have a distinct number of electrons in very particular energy levels.

Twenty liters of NO gas react with excess oxygen. How many liters of NO2 gas are produced if the NO gas reacts completely?

Answers

Answer:

2O L

Explanation:

The balanced chemical equation is 2NO+O  

2

​  

→2NO  

2

​  

 

Thus, 2 moles of NO will produce 2 moles of NO  

2

​  

.

Also, the volume is directly proportional to the number of moles.

Therefore, 20 L of NO will produce 20×  

2

2

​  

=20 L of NO  

2

​  

9. how many radioactive disintegrations occur per minute in a -g sample of that has been freshly separated from its decay products? the half-life of is years.

Answers

Therefore, approximately radioactive disintegrations occur per minute in a -g sample of that has been freshly separated from its decay products.

If we assume that the sample of isotope is freshly separated from its decay products, then we can assume that there are no radioactive disintegrations occurring at the start. However, as time passes, the isotope will undergo radioactive decay and produce its decay products.
The half-life of the isotope is years, which means that after one half-life has passed, half of the original sample will have decayed into its decay products. After two half-lives have passed, three-quarters of the original sample will have decayed, and after three half-lives have passed, seven-eighths of the original sample will have decayed, and so on.
To determine how many radioactive disintegrations occur per minute in a -g sample of the isotope, we need to know the decay constant, which is a measure of how quickly the isotope decays. The decay constant can be calculated using the half-life as follows:
decay constant = ln(2) / half-life
Substituting the given values, we get:
decay constant = ln(2) / years =
Once we know the decay constant, we can use the following formula to calculate the number of radioactive disintegrations per minute:
radioactive disintegrations per minute = decay constant x number of atoms
To calculate the number of atoms, we need to use Avogadro's number, which is approximately x 10^23 atoms/mol. Since we have a -g sample, we can calculate the number of moles as follows:
moles = mass / molar mass
The molar mass of is approximately g/mol, so we get:
moles = -g / g/mol =
Multiplying this by Avogadro's number gives us the number of atoms:
number of atoms = x 10^23 atoms/mol x =
Substituting the values, we get:
radioactive disintegrations per minute = x x =

To know more about radioactive disintegrations visit:

https://brainly.com/question/29972448

#SPJ11


Which of the following would make a solution
A. Sand in water
B. Oil in water
C. lee in water
O D. Sugar in water

Answers

It would be, Sugar in water
The answer is sugar in water, because when you stir sugar into a glass of water you are forming a solution. Hence, As the sugar molecules spread evenly throughout the water, the sugar dissolves.

Student Exploration: Determining Density via Water Displacement
Directions: Follow the instructions to go through the simulation. Respond to the questions and
prompts in the orange boxes.
Vocabulary: Archimedes' principle, density, displacement, mass, volume
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
A ship floats by an iceberg as shown.
1. Based on the picture, which object is denser, the
iceberg or the ship?
2. How do you know?

Student Exploration: Determining Density via Water DisplacementDirections: Follow the instructions to

Answers

1. Iceberg

2. The iceberg is more underwater than the ship.

Thanks to radar technology better crew training and iceberg monitoring systems, ship collisions with icebergs are generally avoidable, but when a collision does occur, the consequences can be devastating. These things are very rare. One of the rare but high-impact risks. The Titanic was neither the first nor the last ship to hit an iceberg and sink.

Here are the ten most sunk ships in the world in terms of lives lost due to iceberg accidents. A second study by British historian Tim Martin argued that atmospheric conditions on the night of the disaster may have caused a phenomenon called super refraction. This diffraction of light may have created a mirage or optical illusion that obscured the iceberg from the Titanic's vantage point.

Learn more about An iceberg here:-https://brainly.com/question/17873919

#SPJ1

Hello can you please solve the question below in the photo ​

Hello can you please solve the question below in the photo

Answers

Using the relationship between number of moles, concentration and volume, the amount of sal^2-(aq) transferred to the 10 ml volumetric flask is 6.0 × 10^-6 mol.

What amount (in moles) of sal²⁻(aq ) was transferred to the 10 ml volumetric flask?

Since 0.5 ml of the stock solution was transferred to a 10 ml volumetric flask, the volume of the transferred solution is:

0.5 ml = 0.5 × 10^-3 L = 5.0 × 10^-4 L

To determine the amount of sal^2-(aq) transferred to the 10 ml volumetric flask, we can use the formula:

amount (in moles) = concentration × volume

where concentration is in moles per liter (mol/L) and volume is in liters (L).

The concentration of the stock solution is:

concentration = 1.20 × 10^-3 mol / 0.1 L = 1.20 × 10^-2 mol/L

Using this concentration and the volume of the transferred solution, we can calculate the amount of sal^2-(aq) transferred to the 10 ml volumetric flask:

amount (in moles) = concentration × volume

= 1.20 × 10^-2 mol/L × 5.0 × 10^-4 L

= 6.0 × 10^-6 mol

Learn more on concentration of a solution here;

https://brainly.com/question/5101074

#SPJ1

• How many mg of glucose you will need to prepare 20 mL of a 25 mM solution? (Glucose Mw = 180 g/mol) • using your 25 my iucse solutio as a stock, explain how you would prepare 2 mL of a 5 mM glucose solution. • During fasting, blood glucose concentration is approximately 70 100 mg in 100 mL volume. Express this concentration range in Molarity • Explain how you would prepare 1 L of a 1 M Tris (MW = 121.14 g/mol) solution and 500 mL of a 0.5 M EDTA (MW = 292.24 g/mol) solution. Using these 1 M Tris and 0.5 M EDTA solutions as stocks, explain how you would prepare 100 mL of TE (TE = 10 mM Tris + 1 mM EDTA)

Answers

We need 73.06 g of EDTA to prepare 500 mL of a 0.5 M solution.

Solutions are an important concept in chemistry and are frequently used in various experiments and procedures. In order to prepare a solution of a specific concentration, it is important to know the molecular weight of the solute, the desired volume and concentration of the solution, and the units in which the concentration is expressed.

To prepare a 25 mM solution of glucose in 20 mL, we need to calculate the mass of glucose required. The formula to calculate the mass of solute is:

Mass of solute = (concentration in mM x volume in mL x molecular weight) / 1000

Plugging in the values, we get:

Mass of glucose = (25 mM x 20 mL x 180 g/mol) / 1000 = 9 g

Therefore, we need 9 g of glucose to prepare 20 mL of a 25 mM solution.

To prepare 2 mL of a 5 mM glucose solution, we can use the 25 mM glucose solution as a stock solution and dilute it to the desired concentration. The formula to calculate the volume of stock solution required is:

Volume of stock solution = (final concentration x final volume) / initial concentration

Plugging in the values, we get:

Volume of stock solution = (5 mM x 2 mL) / 25 mM = 0.4 mL

Therefore, we need 0.4 mL of the 25 mM glucose solution and 1.6 mL of water to prepare 2 mL of a 5 mM glucose solution.

The concentration of blood glucose during fasting is approximately 70-100 mg in 100 mL volume. To convert this concentration to Molarity, we need to first convert the mass of glucose to moles using its molecular weight, and then divide by the volume in liters. The formula to calculate the concentration in Molarity is:

Concentration in M = (mass in g / molecular weight) / volume in L

Plugging in the values, we get:

Concentration in M = (0.07-0.1 g / 180 g/mol) / 0.1 L = 3.9-5.6 mM

Therefore, the concentration range of blood glucose during fasting is approximately 3.9-5.6 mM.

To prepare 1 L of a 1 M Tris solution, we need to calculate the mass of Tris required. The formula to calculate the mass of solute is the same as before:

Mass of solute = (concentration in M x volume in L x molecular weight)

Plugging in the values, we get:

Mass of Tris = 1 M x 1 L x 121.14 g/mol = 121.14 g

Therefore, we need 121.14 g of Tris to prepare 1 L of a 1 M solution.

To prepare 500 mL of a 0.5 M EDTA solution, we need to calculate the mass of EDTA required. The formula is the same as before:

Mass of solute = (concentration in M x volume in L x molecular weight)

Plugging in the values, we get:

Mass of EDTA = 0.5 M x 0.5 L x 292.24 g/mol = 73.06 g

Therefore, we need 73.06 g of EDTA to prepare 500 mL of a 0.5 M solution.

To prepare 100 mL of TE (10 mM Tris + 1 mM EDTA) solution using the 1 M Tris and 0.5 M EDTA stock solutions, we can use the formula for dilution of stock.

To know mare about Solution refer here:

https://brainly.com/question/29015830#

#SPJ11

How many Oxygen atoms in: 5H2SO3

Answers

Answer:

20

Explanation: I think

Answer:

20

Explanation:

infrared (ir) spectroscopy is used to identify functional groups within a molecule. which of these regions corresponds to the fingerprint region for the molecule? the structure is a benzene ring bonded to an amine on carbon 1. there is a methyl group on carbons 2 and 6. the ir spectrum has several labeled peaks. a is a broad stretch around 3300, b is a series of stretches around 2900, c is around 1800 and there are very small peaks, d is a large stretch at around 1600 and e is around 1000 inverse centimeters in wavenumber. identify the fingerprint region.

Answers

The infrared (IR) spectroscopy is used to identify functional groups within a molecule. The regions corresponds to the fingerprint region for the molecule is the E region.

The structure is the benzene ring bonded to the amine on carbon 1. There is the methyl group on the carbons 2 and 6.   The IR spectrum has several labeled peaks are

A is a broad stretch around the 3300 cm⁻¹,

B is a series of stretches around the 2900 cm⁻¹,

C is around 1800 cm⁻¹ and there are the very small peaks,

D is a large stretch at around the 1600 cm⁻¹ and

E is around 1000 cm⁻¹ in wavenumber.

The IR spectra is called as the fingerprint region, as the absorption pattern is the highly complex but the unique to each organic structure. The finger print region is the E region.

To learn more about IR spectra here

https://brainly.com/question/28523860

#SPJ4

infrared (ir) spectroscopy is used to identify functional groups within a molecule. which of these regions

What does the atomic mass of an element represent?

Answers

Answer: the total number of protons and neutrons in an atom

The atomic mass of an element represents the total number of protons and neutrons in an atom

Hope this helps:)

How many molecules of nitrogen dioxide NO2 are in 1 mole of NO2?

Answers

Answer:

The answer is 46.0055. We assume you are converting between grams NO2 and mole. You can view more details on each measurement unit: molecular weight of NO2 or mol This compound is also known as Nitrogen Dioxide.

Explanation:

hope this helps

Catecholamines undergo what type of phase II reaction?

Answers

Catecholamines undergo conjugation with sulfate or glucuronide in phase II reactions.

In these reactions, the catechol group (-OH and -OH in adjacent carbon atoms) is usually targeted for conjugation. Catecholamines include neurotransmitters such as dopamine, norepinephrine, and epinephrine, which play essential roles in the sympathetic nervous system and stress responses. By conjugating with sulfate or glucuronide, the body can inactivate catecholamines and excrete them in urine, bile, or feces. This is an important step in maintaining the proper balance of these neurotransmitters in the body.

To know more about Catecholamines, here

brainly.com/question/30417027

#SPJ4

Genes are found inside chromosomes and DNA is contained in the genes.

True
False

Answers

I believe that's true.

A regular 12-oz beer is about 5% alcohol. This works out to about 14. 03 grams of alcohol per beer. If the driver drank two beers, how many grams of alcohol did he consume?.

Answers

A regular 12-oz beer is about 5% alcohol. This works out to about 14. 03 grams of alcohol per beer. If the driver drank two beers, he consume 28.06 grams of alcohol.

A regular 12-oz beer has 5% alcohol by volume. According to this, a beer contains roughly 14.03 grams of alcohol.

So the mass alcohol in two beers would be

mass alcohol in 2 beers= 2 x mass alcohol in 1 beer

Mass alcohol in 2 beers=14.03 grams of alcohol x 2 = 28. 06 gram

Therefore, 5% alcohol makes up a typical 12-oz beer. According to this, a beer contains roughly 14.03 grams of alcohol. Two beers would equal 28.06 grams of alcohol for the driver.

Learn more about alcohol at https://brainly.com/question/6452985

#SPJ4

What is the change in oxidation state in the reaction
2H2S +3O2---- 2H2O + 2SO2

Answers

Answer: In the reaction 2H2S + 3O2 → 2H2O + 2SO2, the oxidation state of sulfur changes from -2 in H2S to +4 in SO2. This means that sulfur is oxidized, and oxygen is reduced.

Explanation:

The oxidation state of an element is the number of electrons that an atom loses or gains when it forms a chemical bond. In H2S, the sulfur atom has an oxidation state of -2 because it has lost two electrons to the hydrogen atoms. In SO2, the sulfur atom has an oxidation state of +4 because it has gained four electrons from the oxygen atoms.

The oxidation state of oxygen changes from 0 in O2 to -2 in H2O and SO2. This means that oxygen is reduced, and sulfur is oxidized. In O2, the oxygen atoms are not bonded to any other atoms, so they have an oxidation state of 0. In H2O and SO2, the oxygen atoms have an oxidation state of -2 because they have gained two electrons from the hydrogen and sulfur atoms, respectively.

Element Oxidation state in H2S         Oxidation state in SO2        Oxidation state in H2O

Sulfur                      -2   +4       +4

Oxygen                       0   -2       -2

Hydrogen              +1   +1       +1

what is the percent abundance of the size 4d nails in this sample. PLS ASAP

what is the percent abundance of the size 4d nails in this sample. PLS ASAP

Answers

Answer:

? = 61.5%

Explanation:

To find the percent abundance of 4d nails, you need to use the following equation:

Percent Abundance = (number of nails / total nails) x 100%

Percent Abundance (4d) = (123 / 123 + 77) x 100%

                                          =  (123 / 200) x 100%

                                          = 0.615 x 100%

                                          =  61.5%

why is it usually not possible to recrystallize a liquid substance?

Answers

Because liquid is a dissolved solid so it can’t be recrystallise and most liquid are taken into the body eg drinks and water

In a different investigation, a student passed a current of 0.6 A through copper
sulfate solution for 300 s, Calculate the charge flow through the solution. Use the
equation: Charge flow = current time *

Answers

Answer:

bdnsndmzmkrrbby

Explanation:

hfjdkxkx dnamkynskfkfnd

How do you balance these equations?

How do you balance these equations?

Answers

Answer:

1Al₄C₃ + 12H₂O → 3CH₄ + 4Al(OH)₃

Explanation:

SOLUTION :-

Balance it by using 'hit & trial' method , and you'll get the answer :-

1Al₄C₃ + 12H₂O → 3CH₄ + 4Al(OH)₃

VERIFICATION :-

In reactant side of equation :-

Number of atoms in Al = 1×4 = 4Number of atoms in C = 1×3 = 3Number of atoms in H = 12×2 = 24Number of atoms in O = 12×1 = 12

In product side of equation :-

Number of atoms in C = 3×1 = 3Number of atoms in H = (3×4) + 4(1×3) = 24Number of atoms in Al = 4×1 = 4Number of atoms in O = 4(1×3) = 12

Number of atoms of each element is equal in both reactant & product side of equation. Hence , the equation is balanced.

PLEASE ANSWER QUICKLY !!! FOR MY CHEMISTRY CLASS !!!!!

PLEASE ANSWER QUICKLY !!! FOR MY CHEMISTRY CLASS !!!!!

Answers

The density of the unknown metal, given the data is 1.67 g/mL

What is density?

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

With the above formula, we can determine the density of the unknown metal. Details below:

How to determine the density Mass of unknown metal = 20 - 0 = 20 gVolume of unknown metal = 12 - 0 = 12 mL Density of unknown metal =?

Density = mass / volume

Density of unknown metal = 20 / 12

Density of unknown metal = 1.67 g/mL

Thus, the density of unknown metal is 1.67 g/mL

Learn more about density:

https://brainly.com/question/952755

#SPJ1

What is the pH of a 2.20 M solution of the weak acid CH3CO2H, given that the Ka of the acid is 1.76×10−5? The equilibrium expression is:

CH3CO2H(aq)+H2O(l)⇋H3O+(aq)+CH3CO−2(aq)

Answers

The pH of the 2.20 M solution of the weak acid CH3CO2H can be calculated using the equilibrium expression and the dissociation constant (Ka) of the acid.

What is the pH of the solution?

To determine the pH of the solution, we need to consider the dissociation of the weak acid CH3CO2H. The equilibrium expression shows the formation of H3O+ ions (hydronium ions) and CH3CO−2 ions (acetate ions) from the dissociation of CH3CO2H in water.

The Ka value represents the acid dissociation constant and is given as 1.76×10−5. This value indicates the degree of dissociation of the acid. Since the acid is weak, it only partially dissociates, and we can assume that the initial concentration of CH3CO2H remains relatively unchanged.

To find the pH, we need to determine the concentration of H3O+ ions. Since CH3CO2H is a weak acid, we can approximate the concentration of H3O+ ions to be equal to the concentration of the acid that dissociates. Therefore, the concentration of H3O+ ions is approximately 2.20 M.

Using the equation pH = -log[H3O+], we can calculate the pH of the solution.

In this case,

\(pH = -log(2.20) = -log(2.20) = 0.657.\)

Therefore, the pH of the 2.20 M solution of CH3CO2H is approximately 0.657.

Learn more about pH

brainly.com/question/32445629

#SPJ11

Why would the electrolysis reaction stop if the battery was removed

Answers

If the battery was removed, the energy produced by the battery would not be able to continue its path along the circuit.

How many molecules are in 28 g of CO2 ?

Answers

Answer:

0.636 molecules or using significant figures, the answer is 0.64 molecules of CO2

Explanation:

Or 44 g/ mol of CO2

Other Questions
Mentionnez-vous souvent vos difficults vos parents? advances in technology have facilitated the widespread use of credit scoring by financial institutions in making their lending decisions. credit scoring can be defined broadly as the use of historical data and statistical techniques to rank the attractiveness of potential borrowers and guide lending decisions. in what ways might this practice enhance the efficiency of the financial system? Behavioral emergencies page 1299Common causes of depression in the elderly include all of the following except The area of a sector of a circle with a central angle of radians is . Find the radius of the circle. Do not round any intermediate computations. Round your answer to the nearest tenth. HURRY WILL GIVE BRAINLIESTWhich of the following characterizes Clipper ships?a slender linesc. large square sailsb. tall mastsd. all of the above Someone help number 34 1-13 Use the graph and table to answer the questions.Which vehicle loses the most value each year?CARTRUCKSAMEWhich vehicle will lose all of its value first?CARTRUCKSAMEIf the trucks rate of depreciation changes to a decrease of $1,650 each year, which vehicle will lose all of its value first?CARTRUCKSAME The issues and challenges students faced during covid related with technology essay A rectangular prism has a length of 3ft, a height of 6ft, and a width of 20ft. What is itsvolume, in cubic ft? explain what characteristics have enabled angiosperms to be so successful in more environments than other plant phyla. If the dissociation constant of a weak acid is 7.1 x 10-5, at what ratio should you adjust the concentration of the weak acid and its conjugate base in order to prepare a buffer that has a pH of 4.15 Why was Mark chasing Charlie?A. Charlie told Karen that Mark liked her.B. Charlie took Mark's bike without asking.C. Charlie accused Mark of lying about the toad.D. Charlie told a lie about Mark's father. Which statement about a data set provides the most information about the variability of the data?A. The mean of the data set is 28.B. The median of the data set is 30.C. The maximum of the data set is 40.D. The range of the data set is 18. A proposed project has fixed costs of $41,000 per year. The operating cash flow at 14,000 units is $63,000. a. Ignoring the effect of taxes, what is the degree of operating leverage?b. If units sold rise from 14,000 to 14,400, what will be the increase in operating cash. flow? c. What is the new degree of operating leverage? Tomas bought 80 tickets for rides at an amusement park. Each ride costs 5 tickets, and Tomas has been on x rides so far. Select all the expressions that show the number of tickets that Thomas has left. What strategy did the Allies use to defeat Japan ? Explain why it is important to validate the periodicity ofgrowth ring formation in otoliths before age and growth can bemodeled? What is the purpose of business communication what elements are necessary to achieve this purpose? Operating Expenses Can Be Separated Into a. Expenses That Increase As Sales Increase. b. Expenses That Do Not Increase With Sales. c. Mortgage And Lease Payments That Increase With Sales. d. All Of The Above. After many reports of the slaughter of African Muslims in Darfur, what finally led the International Court to investigate?A. Omar Bashir sent a notice to the United Nations that he would not cooperate anymore.B. A young African Muslim woman was able to cross the border and report her story to police.C. US. President George Bush publicly called the acts of Bashirs government a genocide.D. The United Nations were provided with proof that Omar Bashir was conspiring with China.