Given 30.00 ml of 0.10 m acetic acid and 50.00 ml of 0.100 m koh, the pH of the solution is 12.40
What is the pH of a substance?This is the measure of the acidity or the basicity of an aqueous or liquidsolution.
The details that are contained in this question are:
Mole of CH3COOH = 0.1 M
Volume of CH3COOH = 30 mL
Mole of KOH = 0.1 M
Volume of KOH = 50 mL
mol of (CH3COOH) = 0.1 Mole * 30 mL = 3 mol
mol of (KOH) = 0.1 Mole * 50 mL = 5 mol
From the solution above,
mol of CH3COOH = 3 mol
mol of KOH = 5 mol
3 mol of both substances is going to react
excess KOH remaining = 5 - 3 = 2 mmol
Volume of both Solutions
= 30 + 50 = 80 mL
OH⁻ = 2/80
= 0.025 M
use:
pOH = -log [OH-]
= -log (0.025)
pOH = 1.602
PH = 14 - pOH
= 14 - 1.60
= 12.40
The calculated pH is therefore 12.40
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If you were a forensic scientist and you were called to a crime scene to see if drugs were present, what would you do to determine this?
If I were a forensic scientist and asked to identify drugs at a crime scene, you would take samples where residue is likely to be present.
What is a crime scene?A crime scene is a term used to refer to the location where a crime occurs and the arrangement of evidence to determine how events related to the crime occurred at that location.
What is a sample?A sample is a tool used in forensic investigation to determine the existence of an element or substance at a crime scene.
For example, in this case we can take samples from the corpse's hands, nose and mouth to determine if he used drugs prior to his death.
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What is the length of the edge of a cube if it has a volume of 27 cubic inches
volume= 27 cubic inches.
to find:length of edge.
solution:V=a^3
a=V⅓
=27⅓
= 3 inches
Which situation would most likely be a driving force for changes in a species?
A situation which is most likely to be a driving force for changes in a species is increased mating events due to environmental stability.
What is a species?A species can be defined as a biological classification of related organisms that have similar characteristics and they are capable of mating (breeding) with one another in a cycle or different seasons.
This ultimately implies that, increased mating events between living organisms due to environmental stability is a situation which is most likely to be a driving force for changes in a species.
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Two skydivers of different masses jump from a plane. in three to five sentences, explain how their falls compare, including the effects of gravity, mass, and air resistance.
When a skydiver jumps out of a plane, the skydiver is said to accelerates down as a result of the force of gravity. No air resistance do acts in the upwards direction, and thus, the resultant force is said to be acting downwards.
Due to the above, the skydiver is known to moves or accelerates towards the ground.
How gravity and air resistance affect the motion of the skydiver?Note that before the parachute of a skydiver is opened, the air resistance is known to be more than the downward force of gravity.
The net force and the acceleration on the falling skydiver is said to be often upward. And as such, the upward net force on a downward falling object such as the skydiver would cause the diver to slow down.
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Which conflicts are revealed in the passage? select two options. an internal conflict within the narrator, who is frightened by the extremity of her anger at her mother an external conflict between the narrator, who is demanding independence, and her mother, who is demanding obedience an external conflict between the narrator and her mother over whether or not the narrator will continue to live at home an internal conflict within the narrator’s mother, who cannot decide whether to throw her daughter out of the family home an external conflict between the narrator, who wants to be the kind of daughter her mother wants, and her mother, who thinks that’s impossible
The conflicts revealed in the passage from "Two Kinds" are;
An internal conflict within the narrator, who is frightened by the extremity of her anger at her mother.An external conflict between the narrator, who is demanding independence, and her mother, who is demanding obedience.The passage from "Two Kinds.”"You want me to be something that I’m not!” I sobbed. "I’ll never be the kind of daughter you want me to be!” "Only two kinds of daughters,” she shouted in Chinese. "Those who are obedient and those who follow their own mind! Only one kind of daughter can live in this house. Obedient daughter!”
"Then I wish I weren’t your daughter. I wish you weren’t my mother,” I shouted. As I said these things I got scared. It felt like worms and toads and slimy things crawling out of my chest, but it also felt good, as if this awful side of me had surfaced, at last. "Too late change this,” said my mother shrilly. And I could sense her anger rising to its breaking point. I wanted see it spill over. And that’s when I remembered the babies she had lost in China, the ones we never talked about. "Then I wish I’d never been born!” I shouted. "I wish I were dead! Like them.
Therefore, the correct answer is option A and option B.
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Answer:
A and B
Explanation:
Because factories were usually located in cities, industrialization went hand-in-hand with –. the industrial economy helped create robust growth in the united states for many decades. plentiful manufacturing and industrial jobs meant that – could enter the job market making a good wage. but as the economy began to transform once more, from an industrial to a postindustrial system, the nature of work changed as well. – led to a decline in manufacturing jobs: with about – jobs lost since 1980
The up-menu list for the sentence which explains the industralization and its impact on the economy includes:
urbanizationhigh school graduatesOffshoring7.5 millionWhat is industralization?An industralization means the development of industries in a region which plays an instrumental role in the economic development of the world
Correct drop-downs includes:Industrialization went hand-in-hand with urbanization. The industrial economy helped create robust growth in the united states for many decades. plentiful manufacturing and industrial jobs meant that high school graduates could enter the job market making a good wage. But as the economy began to transform once more, from an industrial to a postindustrial system, the nature of work changed as well. Offshoring led to a decline in manufacturing jobs: with about 7.5 million jobs lost since 1980.
In conclusion, the emergence of Industrialization is an imporant event that impact the world economy at large.
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Drag the labels to show how the glucose and hormone levels will change in each mouse after they are joined by parabiosis. labels may be used once, more than once, or not at all
The labels that will show how the glucose and hormone levels will change in each mouse after they are joined by parabiosis are:
Those of db/db are:
The glucose level: stays the same.The hormone level: decreases.Those joined by parabiosis which are Wild type:
Glucose level: stays the sameHormone level: decreasesWhat is the use of parabiosis to evaluate hormone function?Parabiosis is known to be a useful and effective tool to examine hormone function.
This is b because it allows the exchange of long-lived molecules (such as hormones) to take place between the two joined organism. Therefore, the glucose levels of each mouse can stay the same, but the hormone levels will be altered.
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Calculate the solubility at of in pure water and in a solution. you'll find data in the aleks data tab. round both of your answers to significant digits
The solubility of a substance in water tells us the extent to which the substance can dissolve in water
What is solubility?The solubility of a solute is the extent to which the solute can dissolve in a solvent. There are several units used to express solubility of a solute. This question is incomplete as the data is missing.
However, the solubility of a substance in water tells us the extent to which the substance can dissolve in water.
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Mr. red's first year salary is $30,000 and it increases by $500 each year. what is the explicit rule for this sequence in simplified form?
The explicit rule to describe the behaviour of the salary is given as
Nth Year Salary = 30,000+ 500n
Word ProblemGiven Data
First year Salary = $30,000Yearly Increase = $500Let the number of years be n
Hence the explicit rule for this scenario is given bellow as
Nth Year Salary = 30,000+ 500^n
So for the first year n = 1 the salaary
Nth Year Salary = 30,000+ 500n
Nth Year Salary = 30,500
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How many molecules of no2 can be formed using 2 molecules of no
The number of molecules of NO₂ that can be obtained when 2 molecules of NO react is 2 molecules
Balanced equationWe'll begin by writing the balanced equation for the reaction. This is given below:
NO + O₂ —> NO₂
There are 3 atoms of O on the left side and 2 atoms on the right side. It can be balanced by writing 2 before NO and NO₂ as shown below
2NO + O₂ —> 2NO₂
Now, the equation is balanced
From the balanced equation above,
We can see that 2 molecules of NO will react to produce 2 molecules of NO₂.
Thus, we can conclude that 2 molecules of NO₂ will be obtained from the reaction.
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If you travel 300 km in 6 hours what is your average speed
[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]
Average speed is defined as total distance covered by total time taken ~
[tex]\qquad \sf \dashrightarrow \: \dfrac{total \: distance}{total \: time} [/tex]
[tex]\qquad \sf \dashrightarrow \: \dfrac{300}{6} [/tex]
[tex]\qquad \sf \dashrightarrow \:50 \: \: kmph[/tex]
A 20.0-ml sample of a 0.200 mhbr solution is titrated with a 0.200 mnaoh solution. calculate the ph of the solution after the following volumes of base have been added.
The calculated pH of the solutions are given below:
The pH of the solution after 14.0 ml of base is added to it is calculated as 1.45. The pH of the solution after 19.8 ml of base is added to it is calculated as 3.0The pH of the solution after 20.0 ml of base is added to it is calculated as 7. What is pH?This is the level of acidity or alkalinity of an aqueous solution. The pH of a substances tells if its an acid, base or neutral.
HBr and NaOH while in water would dissociate and they would become H+ and OH- respectively.
Mol of HBr = Mol * Vol
= 0.200 * 20mL
= 4 mmol
A. Moles of NaOH added
= 0.2 X 14
= 2.8 mmol
Moles of H+ that did not react
= 4 - 2.8
= 1.2 mmol
1.2/1000 = 0.0012 moles
Total volume = 20 + 14
= 34 mL to litres
= 0.034 L
Molarity of H+ = 0.0012 / 0.034L
= 0.035 M
-log[0.035] = 1.45
The pH of the solution is 1.45
B. NaOH added = 19.8 * 0.2 =
3.96 mmoles
The unreacted solution
= 4.0 - 3.96
= 0.04 mmol
0.04/1000 = 0.00004 moles
Total volume = 20 + 19.8
= 39.8mL
Converted to litres = 0.0398L
Molarity = 0.00004 / 0.0398L
= 0.001
-log(0.001) = 3.0
The ph Is therefore 3.0
C. Moles of NaOH added = 0.2*20mL = 4mmol
All the H+ are going to be consumed here. This would result into a neutral solution pH = 7
Complete question:
20.0 mL sample of 0.200 M HBr solution is titrated with 0.200 M NaOH solution. Calculate the PH of the solution after the following volumes of base have been added.
A. 14.0 mL
B. 19.8 mL
C. 20.0 mL
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Giada is at an extracurricular activity fair for her high school and is trying to decide which clubs to join. her hobbies include fixing old appliances and rebuilding them to sell at flea markets. she prefers not to have children when she's older and faints at the sight of blood. she's never been thrilled about public speaking.
Answer:
Giada should join HOSA.
Explanation:
Did the test
Answer:
Giada should join the FEA
Explanation:
i took the edge unit test :)
What is the sequence of transformations that maps δpqr onto δp’q’r’? use the drop-down menus to explain your answer. triangles p q r and p prime q prime and r prime on a coordinate plane. the smaller triangle has coordinates p negative 1 comma 1, q negative 2 comma 3, and r negative 2.5 comma 1. the larger triangle has coordinates p prime 2 comma 2, q prime 4 comma 6, and r prime 5 comma 2. a dilation with center (0, 0), a scale factor choose... , and a reflection across the choose... .
The sequence of transformation is:
a dilation with center (0, 0), a scale factor 2, and a reflection across the y-axis
How to determine the sequence of transformation?The coordinates are given as:
p = (-1, 1)
q = (-2, 3)
r = (-2.5, 1)
p' = (2 , 2)
q' = (4, 6)
r' = (5, 2)
Start by reflecting the triangle pqr across the y-axis.
The transformation rule is:
[tex](x,y) \to (-x,y)[/tex]
So, we have:
p = (1, 1)
q = (2, 3)
r = (2.5, 1)
Dilate the resulting by a scale factor of 2 with the center of (0, 0)
The transformation rule is:
(x,y) = 2(x,y)
So, we have:
p' = (2 , 2)
q' = (4, 6)
r' = (5, 2)
Hence, the sequence of transformation is:
a dilation with center (0, 0), a scale factor 2, and a reflection across the y-axis
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Determine whether the set of vectors is orthogonal
I don't see any other part of the problem, but to determine whether the vectors are orthogonal, the dot product has to equal zero.
Hope that helps!
Lesson 4.1 practice c geometry answers mcdougal littell
Lesson 4.1 practice c geometry question is below: What is the classification of the angle (Image attached.)
What is Lesson 4.1 practice geometry about?This is known to be a textbook that was written as McDougal Littell Geometry. It is regarded as a Practice Workbook and it was the 1st Edition.
The classification of the angle is known as an acute angle. Note that an Acute angles is one that is known to be less than 90 degrees.
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Giant kelp which can grow up to 60 meters are known as jiskha
Giant kelp which can grow up to 60 meters are protist.
How many meters can giant kelp grow?It can grow as much as 53 m. Note that Giant kelp often grow to about 100 feet (30 m) and its limits in terms of lengths is about 175 feet (53 m).
Macrocystis pyrifera is known to be a type of a fastest-growing organisms that can be seen on Earth whose length is about 45 m (150 ft).
See full question
Giant kelp, which can grow up to 60 meters, are known as (1 point)
vascular plants.
protists.
nonvascular plants.
fungi.
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Calculate the number of moles contained in 550. ml of carbon dioxide at stp.
Considering the definition of STP conditions, 0.02455 moles are contained in 550 mL of carbon dioxide at STP.
Definition of STP conditionThe STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
Amount of moles contained in 550 mLIn this case, you can apply the following rule of three: if by definition of STP conditions 22.4 liters are occupied by 1 mole of helium, 0.550 L (0.550 L= 550 mL, being 1 L= 1000 mL) are occupied by how many moles?
[tex]amount of moles=\frac{0.550 Lx 1 mole}{22.4 L}[/tex]
amount of moles= 0.02455 moles
Finally, 0.02455 moles are contained in 550 mL of carbon dioxide at STP.
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In what industry do fertilizers and pesticides wash off and contaminate water supplies?
agriculture is answer
On the map 5th ave. 6th ave. and 7th ave. are parallel
The length of Main St. between 5th Ave. and 6th Ave Round to the nearest hundredth is; 0.24 km
How to use triangle proportionality theorem?From the image attached, we are given that 5th Avenue is parallel to 6th avenue.
Now, Let the length of main street between 5th and 6th Avenue be x.
By using the triangle proportionality theorem, we have;
0.4/x = 0.5/0.3
Thus;
x = (0.4 * 0.3)/0.5
x = 0.24 km
In conclusion, the length of street is 0.24 km
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Mushrooms are multicellular living organisms. what do cells of mushrooms need to function?
Ad←→ is tangent to circle b at point c. what is the measure of ∠bca? 40º 50º 90º 180º circle b with radius b c. line tangent to chord c has points d a c in that order. segments are drawn from the center to each point
Answer:
90
Explanation:
I took the test for it
Answer:90 degrees
Explanation:
it looks like a 90 degree angle ☠️
Verify that the function satisfies the hypotheses of the mean value theorem on the given interval 4
Answer:
Step-by-step explanation
See attachment(s) with explanation below.
Explanation:
What details can be observed in the painting? select 3 options. an unclean floor injured men surgical tables dazed expressions concerned relatives
The following details can be observed in the painting:
An unclean floor.Injured menDazed expressionsWhat is a painting?A painting can be defined as an artwork that is typically used by an artist to express and depict an idea or thought about a place, thing, people, etc.
In this scenario, the painting is titled "L’Ambulance de la Gare de Poitiers" and it was drawn by Henri Gervex to describe some injured men who were sitting in an unclean floor and they look dazed.
In conclusion, the following details can be observed in the painting attached in the image below:
An unclean floor.Injured menDazed expressionsRead more on paintings here: https://brainly.com/question/2960877
Answer: an unclean floor (1), injured men (2), dazed expressions (4)
Explanation:
What can be inferred from the excerpt? nonstandard forms of english can be as effective as the standard form of english. nonstandard forms of english limit a speaker’s ability to stand up for herself. nonstandard forms of english make communication difficult between cultures. nonstandard forms of english are used more by older adults than by younger adults.
The statement 'nonstandard forms of English can be as effective as the standard form of English' can be extracted in the excerpt from "Mother Tongue".
What is a mother tongue?
A mother tongue refers to a special language spoken by society and adopted as its own by its habitants.
There are many countries around the world that adopted English as their mother tongue and expressions in such countries may be certainly effective.
Mother tongue makes also reference to the language which an individual speaks from his/her childhood.
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Answer: A
Explanation: on edge
For an ellipse, the foci lie on a line called the
Answer: Axis of symmetry
You want to restrict the values entered in a cell to a specific set such as hop skip jump
The list is the best data validation that you should use if you want to restrict the values to a specific set.
What is data validation in a spreadsheet?This is a feature in a spreadsheet such as excel that helps to control the entries that the users are allowed to input in a cell.
You can use this excel feature to ensure that a value is a number that is between 1 and 5.
Complete question:
You want to restrict the values entered in a cell to a specified set, such as hop, skip, jump. Which type of data validation should you use?
database
list
input range
custom
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A security camera in a neighborhood bank is mounted
Answer:
To keep an eye on where you live... To keep your neighborhood safe...
Explanation:
I hope this helps you! :)
which of the following types of drugs would not be appropriate for a patient with chronic asthma?
An asthmatic patient is a patient whose medical condition is termed asthma
Drugs a patient with chronic asthma should avoidThe asthma condition causes the patient the following medical conditions:
CoughDifficulty in breathingWheezingA patient with a chronic asthma must avoid drugs that can aggravate the above conditions.
Some of these drugs are:
Aspirin.PainkillersNon-steroidal anti-inflammatory drugsRead more about medical solutions at:
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Review of peter Sykes please.
Answer:
PETER SYKES is good book which you can definitely refer but you can not entirely rely on this book for your theory as theory in this book containing JEE syllabus is so brief that is hard to understand at once. I personally referred this book rather than SOLOMONS, because I was already in comfort with the organic chemistry and my class notes was enough for me. But our teacher asked us to read this book in general to get better insight on the topics. But if you are not comfortable at the basics itself than this book is not for you definitely, you can use another books like paula yurkaniis bruce, solomons etc. And for questions both MS chouhan and Akshay choudhary is good.