Answer:
pH=11.
Explanation:
Hello!
In this case, since the data is not given, it is possible to use a similar problem like:
"An analytical chemist is titrating 185.0 mL of a 0.7500 M solution of ethylamine(C2HNH2) with a 0.4800 M solution of HNO3.ThepK,of ethylamine is 3.19. Calculate the pH of the base solution after the chemist has added 114.4 mL of the HNO3 solution to it"
Thus, for the reaction:
[tex]C_2H_5NH_2+H^+\rightleftharpoons C_2H_5NH_4^+[/tex]
Tt is possible to compute the remaining moles of ethylamine via the following subtraction:
[tex]n_{ethylamine}=0.1850L*0.7500mol/L=0.1365mol\\\\n_{acid}=0.1144L*0.4800mol/L=0.0549mol\\\\n_{ethylamine}^{remaining}=0.1365mol-0.0549mol=0.0816mol[/tex]
Thus, the concentration of ethylamine in solution is:
[tex][ethylamine]=\frac{0.0816mol}{0.1850L+0.1144L}=0.2725M[/tex]
Now, we can also infer that some salt is formed, and has the following concentration:
[tex][salt]=\frac{0.0549mol}{0.1850L+0.1144L}=0.1834M[/tex]
Therefore, we can use the Henderson-Hasselbach equation to compute the resulting pOH first:
[tex]pOH=pKb+log(\frac{[salt]}{[base]} )\\\\pOH=3.19+log(\frac{0.1834M}{0.2725M})\\\\pOH=3.0[/tex]
Finally, the pH turns out to be:
[tex]pH=14-pOH=14-3\\\\pH=11[/tex]
NOTE: keep in mind that if you have different values, you can just change them and follow the very same process here.
Best regards!
HELP ASAP PLS. The melting of a glacier is an example of the interactions among which of Earth’s spheres?
A. geosphere, troposphere, cryosphere
B. atmosphere, geosphere, cryosphere
C. atmosphere, asthenosphere, biosphere
D. hydrosphere, asthenosphere, atmosphere
Answer:
d. hydrospher, asthenosphere, atmosphere
Answer:
its actually b atmosphere, geosphere, cryosphere atmosphere
Explanation: atmosphere is most likely the heat in the air or the water evaporating , cryosphere is the ice that forms the glaciers. and thats how i know im not sure about geosphere but i know its none of the others ones hope this helps :D
How to make 0.01 Molar solution in 30 ml of water
Answer:
You see the concentration decreased ten fold, from 1 M to 0.1 M.
You can simply increase the volume by ten times.
For example
If you have 250 mL of 1 molar HCl, you can add distilled water upto 2500 mL. Now the concentration is 0.1 molar.
If you want to use the serial dilution method, you can use the C1V1=C2V2 equation.
C1 = starting concentration.
C2 = final concentration.
V is for volume.
So let's say you have 500 mL of 1 M HCl and you only want 50 mL of 0.1 M HCl.
1 M x V1 = 0.1 M x 50 mL
V1 = 5 mL
So you take 5 mL of the original (stock) solution and dilute it up to 50 mL. Then you have 50 mL of 0.1 M HCl.
Explanation:
Liquid hydrogen boils at -252°C. What is the boiling point on the Kelvin scale?
Answer:
Boiling point in kelvin is 373.1 \
boiling point of liquid hydrogen in kelvin is 21.15
Explanation:
importance of distillation column in industry
Answer:
Distillation columns are used to separate mixed feed streams into their own distinct products.
Explanation:
The primary function of the distillation column is to separate the feed stream into (at least) one highest level product stream and one bottom product stream. The performance of the column separation can be justified by the purity of the upper and lower product streams.
In genetic engineering
Answer:
what is the question?
Explanation:
Answer:
A
Explanation:
i just did the question :)
How many significant figures
are in this number?
5.67 x 10^2
Answer:
3
Step-by-step explanation:
Hence, the given number has 3 significant figures.
The surface particles of a sample of matter experiences a strong downward pull
and stretch tight enough for a spider to walk on. This is an example of?
HELP PLEASE ITS DUE TODAY, THANK U!
a)
Name the following compounds
CH, -CH-CH
(i)
CH, Br
-
Answer:
methyl, ethyl,
Explanation:
that should be the case
Sodium benzoate, the sodium salt of benzoic acid, is used as a food preservative. A sample containing solid sodium benzoate mixed with sodium chloride is dissolved in 50.0 mL of .5 M HCl, giving an acidic solution (benzoic acid mixed with HCl ). This mixture is then titrated with .393 M NaOH. After the addition of 46.50 mL of the solution, the pH is found to be 8.2. At this point, the addition of one more drop ( .02 mL) of NaOH raises the pH to 9.3 . Calculate the mass of sodium benzoate (NaC6H5COO) in the original sample. (Hint: At the equivalence point, the total number of moles of acid [here HCl] equals the total number of moles of base [here, both NaOH and NaC6H5COO]
Answer:
Protegerte Freddy Gerrard Reverte Freddy Buffett irrefutables
Explanation:
Princesa fashion casadas libres
what should i do the next time i see someone that i havent seen in a year and they said they want to kiss me
Answer:
Well if you want to kiss them go for it, but if you don't then say sorry but I don't feel comfortable with that.
Hope everything goes well <3
According to Markovnikov's rule of the electrophilic addition to an alkene, the electrophile, usually a proton, is more likely to add to the ___________ in a double bond. This arrangement places the intermediate carbocation on the ________ , which stabilizes it with the presence of _________. In the major product of a reaction following Markovnikov's rule, the___________ will then end up on the more-substituted carbon in a double
Answer:
Explanation:
To fill in the gaps with the appropriate words, we need to rewrite the whole text in the question while adding the right answers to it.
[tex]According \ to \ Markovnikov's \ rule \ of \ the \ electrophilic \ addition \ to \ an \ alkene, \\ \\ the \ electrophile, \ usually, \ a \ proton, \ is \ more \ likely \ to \ add \ to \ the \ \mathbf{less \ substituted \ carbon} \\ \\ \ in \ a \ double \ bond.[/tex]
[tex]This \ arrangement \ place \ the \ intermediate \ carbocation \ on \ the \ \mathbf{more \ substituted \ carbon.}[/tex][tex]Which \ stabilizer \ it \ with \ the\ presence \ of \ \mathbf{more \ substituents} \ the \ major \ product \ of[/tex]
[tex]the \ reaction \ following \ markovnikov \ rules \ the \ \mathbf{nucleophile} \ will \ then \ end \ up[/tex]
[tex]with \ the \ m ore \ substituted \ carbon \ in \ the \ double \ bond.[/tex]
The 2013 Rolls Royce Ghost Alpine has a top speed of 155 miles per hour. Calculate the speed in centimeters per second.
AutoChina Shanghai 2013 also plays host to the world debut of the latest Bespoke Collection from the world’s pinnacle super-luxury marque.
The Alpine Trial Centenary Collection celebrates an extraordinary moment in Rolls-Royce and automotive history. A century ago this June, four Rolls-Royce Silver Ghosts embarked on the Austrian Alpine Trials, the most arduous test of automotive endurance of the time.
In performing without fault over 1820 gruelling miles of near impassable mountain terrain, the Rolls-Royce works team and privateer entrant James Radley helped cement the marque’s reputation for peerless reliability and mechanical excellence, a reputation the company proudly retains today. In doing so establishing the legend of Rolls-Royce as maker of the ‘Best Car in the World’.
This limited edition of Rolls-Royce Ghosts feature exquisitely crafted design cues that pay tribute to these extraordinary motor cars. The exterior paint hue, for example takes close inspiration from Radley’s Silver Ghost, a car that stands side-by-side with the 2013 model in Shanghai.
Mark as brainlist
Which is the correct Lewis structure for acetylene (C2H2)?
Answer:
The answer is H-C≡C-H
Explanation:
WILL GIVE 10 PTS AND BRAINIEST FOR THE RIGHT ANSWER PLEASE HELP!!!
____ is important for making amino acids, proteins, and the chlorophyll a plant uses to carry out photosynthesis.
A. Boron
B. Nitrogen
C. Potassium
D. Phosphorus
E. Calcium
Answer:
c
Explanation:
In the following reduction of iron ore, 3C + 2Fe2O3 –> 4Fe + 3C02, iron is reduced and _____ is oxidized.
A) carbon dioxide
B) carbon
C) iron oxide
D) oxygen
Answer:
B carbon
Explanation:
guessed
PLS ANSWER QUICK!!! ILL GIVE WAY MORE PIONTS!!!!! and ill give brainliest!, JUST GIVE RIGHT ANSWER!!
The following diagram shows a stage of a cell during mitosis.
Which of the following happens to the cell during the stage shown in the diagram? The chromosomes are replicated.
The chromosomes start to condense.
The chromosomes line up in the middle.
The chromosomes begin to uncoil and form chromatin.
Answer:
I promise it is the 2nd one
Explanation:
The following diagram shows a stage of a cell during mitosis. Two identical circles are joined in the middle and they have the nucleolus inside the nucleus in the center of the circles.
Answer:
The Second One
Explanation:I did the test and got this question correct
Pls comment :D
HELP ASAP!!!!!!!!!!
What is sous-vide?
A food stabilizer
B liquid food that chefs make into a spherical shape
C food that chefs quickly freeze using liquid nitrogen
D food that chefs seal in a plastic bag and cook under controlled temperature conditions
Answer:
D) food that a chef seal in a plastic bag and cook under a controlled temperature condition.
Explanation:
Sous vide, also known as low temperature long time cooking, is a method of cooking in which food is placed in a plastic pouch or a glass jar and cooked in a water bath for longer than usual cooking times at a precisely regulated temperature.
which one is the correct ans.
Answer:
Aluminium Sulphate
Explanation:
Aluminium sulphate is the most widely used aluminium coagulant. It is soluble in water and used as a coagulating agent in purification of drinking water and in waste water treatment plants.
Answer:
where are you from .. ...
A fat is composed, in part, of long chains of carbon and hydrogen. This fat as a molecular
mass of 847 grams/mole and an empirical formula of C9H170. Determine the molecular
formula.
Answer:
[tex]C_{54}H_{102}O_6[/tex]
Explanation:
Hello!
In this case, since the molar mass of the empirical formula is:
[tex]MM_{empircal}=9*12.01+17*1.01+16.00=141.26g/mol[/tex]
Thus, the ratio of the molecular to the empirical formula is:
[tex]\frac{847g/mol}{141.26g/mol} =6.0[/tex]
Thus, the molecular formula is six times the empirical formula:
[tex]C_{54}H_{102}O_6[/tex]
Best regards!
what are three limitations of current cloaking technology.
Get this correct I'll give you 40 points.
Explanation:
1.undetectable to electromagnetic waves
2.hiding an object from an illumination containing diffre t wave lengths become difficult as the object sizes grow.
3. reduce the scattering by two orders.
Electromagnetic waves are unable to detect it. With increasing item sizes, it becomes more challenging to conceal an object from an illumination with various wave lengths. two orders down on the scattering.
What is current cloaking technology?
Current clocking technology is defined as a hypothetical or made-up stealth technology that makes things like people or spaceships completely or partially invisible to certain electromagnetic (EM) spectrum wavelengths. In a specific frequency band, this gadget renders an object "invisible" to electromagnetic radiation. Obviously, cloaks that operate in the visible spectrum have the most fascinating potential uses.
These metamaterials, according to the researchers, can shield a medium-sized antenna from radio waves over a wide range of bandwidths, resulting in clearer communications. However, as visible light wavelengths are far shorter than radio waves, it is practically difficult to conceal huge things from them, such as the human body. The issue with present designs is that they can only handle a certain amount of bandwidth. Even this "perfect" 3D cloak that was previously exhibited could only conceal items from microwaves.
Thus, electromagnetic waves are unable to detect it. With increasing item sizes, it becomes more challenging to conceal an object from an illumination with various wave lengths. two orders down on the scattering.
To learn more about current cloaking technology, refer to the link below:
https://brainly.com/question/10964418
#SPJ5
A fly hits a windshield of a truck. The truck exerts a force on the fly, and
the fly exerts an equal and opposite force back on the windshield.
A. Newton’s first law
B. Newton’s second law
C. Newton’s third law
Answer:
A fly hits a windshield of a truck.
Explanation:
newton's first law
The pressure 15.0 m under water is 248 kPa.
What is this pressure in torr
Answer:
1860 torr
Explanation:
In order to convert from kPa to torr, we are going to use the following conversion factor:
1 kPa = 7.5 torrNow we multiply 248 kPa with this factor so that the kPa units cancel each other and only the torr units remain:
248 kPa * [tex]\frac{7.5torr}{1kPa}[/tex] = 1860 torrThis means that the answer is 1860 torr.
5 pos. 1. An excess of sodium sulfate was added to a 500. mL sample of polluted water. The
mass of lead (II) sulfate that precipitatcd was 308.88 mg. Determine the mass of lead that was in
the polluted water.
Na2SO4(aq) + Pb2+ (aq) → 2Na(aq) + PbSO4(s)
Answer:
[tex]m_{Pb^{2+}}=0.211gPb^{2+}[/tex]
Explanation:
Hello!
In this case, according to the stoichiometry of the reaction, it is possible to evidence the 1:1 mole ratio between lead (II) ions and lead (II) sulfate precipitate; that is why we can compute the mass of lead (II) in the polluted water as shown below:
[tex]m_{Pb^{2+}}=308.88mgPbSO4*\frac{1gPbSO4}{1000mgPbSO4} *\frac{207.2gPb^{2+}}{303.26gPbSO4} \\\\m_{Pb^{2+}}=0.211gPb^{2+}[/tex]
Best regards!
MQ: A disease affecting which of the following might results in a problem with the production of blood cells ?Plsss help!!
Answer:
B bone marrow
Explanation:
I hope it will help
Why do particles with different masses have the same kinetic energy when at the same temperature?
Answer: Because Kinetic energy depends on temperature and not mass
Explanation:
Average kinetic energy is defined as the average of the kinetic energies of all the particles present in a system. It is determined by the equation:
[tex]K.E=\frac{3RT}{2}[/tex]
where K.E = Kinetic energy
R= gas constant
T= temperature in kelvin
It is visible that kinetic energy is dependent on the temperature of the system and not on the mass of the system. Thus particles with different masses have the same kinetic energy when at the same temperature
Scientist use capital letters (H) and lowercase letters (h) to represent genes. What type
of gene is represented by a capital letter?
Expressive
O Regressive
O Dominant
Recessive
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Explain three types eye protection and their appropriate uses
Answer:
safety glasses, safety goggles, face shield, they protect your eyes from harmful liquids, bright lights
A student dissolves 14.8 g of ammonium nitrate (NH4NO2) in 300. g of water in a well-insulated open cup. He then observes the temperature of the water fall from 20.0°C to 15.0°C over the course of 4.3 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction:
NH4NO3(s) → NH4+(aq) + NO3^- (aq)
Required:
a. Is this reaction exothermic, endothermic, or neither?
b. If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case.
Answer:
a. Endothermic
b. 6586J are absorbed.
Explanation:
a. When the reaction occurs, the temperature is decreasing from 20.0°C to 15.0°C, that means the reaction is absorbing heat and is endothermic.
b. To find the heat absorbed we must use:
Q = -m*ΔT*C
Where Q is change in heat,
m is the mass of solution (300g + 14.8g = 314.8g)
ΔT is change in temperature (15.0°C - 20.0° = -5.0°C)
And C is specific heat of the solution (4.184J/g°C assuming is the same heat than the heat of pure water).
Replacing:
Q = -314.8g*-5.0°C*4.184J/g°C
Q =
6586J are absorbed
Which of the following is not a valid conversion factor?
Answer:
d
Explanation:
if an atom has 22 protons 28 neutrons 20 electrons what would its atomic number be
Answer:
22
Explanation:
The atomic number indicates the amount of protons, so it would be 22
