Which happens during interphase?
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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Glencoe algebra 1 standardized test practice answer key
An example of Glencoe algebra 1 standardized test is simply 9a² + 7a + 4a² + 2a.
What is Glencoe Algebra 1 about?This is known to be a type of Textbook that is a Series. Its aim is to link math content and produce a set of adaptive instruction for students to succeed in algebra.
In the simplification of 9a² + 7a + 4a² 2a. you add like terms together.
Therefore, the answer will be 13a² + 9a
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Saxon algebra 1 student practice workbook 1st edition solutions
The passage suggests that greater transparency in the federal reserve will help workers and create more equitable prosperity for average americans. suppose the democratic party wants to create a statement about helping workers and reducing inequality in their party platform. explain how the ideological perspective of the democratic party would likely affect how it would address these economic issues.
The ideological perspective of the democratic party would likely bring about the rejecting illegal and corrupt people/nominees.
What is the ideology perspective of the Democratic Party?The party known to be the Democratic Party of the United States is known to be one that uses American liberalism.
The party is known to have large centrist, progressive wings, smaller conservative and also small socialist elements.
Note that suppose the democratic party wants to create a statement about helping workers and reducing inequality in their party platform, they have to create one that is centered around American liberalism.
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#SPJ1
What is the relationship between percentiles and quartiles
Answer:
Quartiles are special cases of percentiles.
Explanation:
Q1 is the 25th percentile, Q2 is the 50th percentile.
(1)is your computer acting up? (2) have your efforts to fix it been useless? (3) are you unsure of who to call? (4) well, we're here to help. (5) kayser computer care is the best choice to fix your computer woes. (6) our technicians are incredibly experienced, and our rates are astoundingly reasonable. which sentence states the writer's claim?
The sentence that states the writer's claim is the number 5:
"Kayser Computer Care is the best choice to fix your computer problems".What is a claim?It corresponds to the presentation of the central idea of a text, as an argument, which you will support with evidence throughout the text. It is a resource widely used in academic research articles, argumentative essays and persuasive speeches.
Therefore, in a commercial message, the claim aims to provide persuasion to the reader through evidence that supports the initial claim.
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What is the name of the place on a solid where two faces meet brainly
Rain water becomes groundwater through what process?
What is the slope of the line tangent to the polar curve r=3θ at the point where θ=π2 ?
The slope of the line tangent to the polar curve r = 3θ at the point where θ = π/2 is; Undefined
What is the slope of the line tangent?
By converting into parametric equations, we have;
x(θ) = r(θ) cos θ = cos 3θ cos θ
y(θ) = r(θ) sin θ = cos 3θ sin θ
By product rule;
x'(θ) = -sin 3θ cos θ - cos 3θ sin θ
x'(π/2) = -sin 3(π/2) cos (π/2) - cos 3(π/2) sin (π/2)
x'(π/2) = 0
y'(θ) = -sin 3θ sin θ + cos 3θ cos θ
y'(π/2) = -sin 3(π/2) sin (π/2) + cos 3(π/2) cos (π/2)
y'(π/2) = 1
The slope m of the curve is gotten from;
m = y'(π/2)/x'(π/2)
m = 1/0
Thus the slope is undefined
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What is (f+g)(x)? f(x)=x2−36 g(x)=x3+2x2−10 enter your answer in standard form in the box. (f+g)(x)=
Answer: i believe the answer is x^3+3x^2-46
Explanation:
Which detail in the excerpt identifies it as fantasy? the bagginses throw extravagant parties. bilbo, a hobbit, is going to be 111. frodo is turning 33 years old. thirty-three is an important number.
The detail in the given excerpt titled The Fellowship of the Ring that identifies as a fantasy is called; Bilbo has a magic ring
What is the given excerpt fantasy:This novel titled "The Fellowship of the Ring" written by J.R.R. Tolkien has repetitive elements that define it as a fantasy novel.
These fantasy words include imagined worlds, mythical creatures and the supernatural. Since Bilbo was going to be eleventy-one 111 has these elements, then Bilbo belongs to the hobbits community which are mythical and fanatical creatures besides the age he is about to reach is unnatural even for a Hobbit.
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Answer:
B
Explanation:
2022
The diagram shows a food web in an ecosystem. Which of these changes is most likely to occur in the ecosystem if all the insects and worms were affected by a disease and died?
Answer:
Not sure.
Explanation:
Do you have the actual diagram to visualize?
Math accelerated chapter 11 congruence similarity and transformations answers
An example of congruence similarity and transformations work is " If the measures of the angles of a triangle are in the ratio 4 : 5 : 9. The triangle is?.
What is right angled triangle?A right triangle is known to be often called right-angled triangle. It is said to be a triangle that is composed of one angle which is at a right angle and two sides which are said to be perpendicular.
So lets take the angles to be 4x, 5x and 9x
We add them to be 4x + 5x + 9x =180°
18x=180° =
x= 180/18
x = 18
So therefore the angles are:
4×10°
=40°
5×10°
=50°
9×10°
=90°
So therefore since one of the angle is 90° and as such, the triangle is right angled triangle.
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In order to figure out the distance, what do I do?
Answer:
d = square root of {(x2 - x1)^2 + (y2-y1)^2}
Explanation:
If you're referring to math-
the distance is equal to (the second x value minus the first x value)^2 plus (the second y value minus the first y value)^2
For example: this is my imaginary ordered pair, I want to find the distance between the points- (2,4) and (3,6)
So d= (3-2)^2 - (6-4)^2 all under a square root
3-2 is = to 1, and 1 squared is just 1.
6-4 is = to 2, and 2 squared is 4.
4+1 is = 5.
So your answer would be the square root of 5.
If your answer ended up as, for example, the square root of 16, you would go a step further and your answer, or distance would be 4, since 4^2 is 16
provide reagents, intermediates and the final product for the reaction sequence.
In a chemical reaction different elements influence, some of them are the reagents, the intermediate products and the final products.
What is a reagent?A reagent is a term that refers to a substance or compound added to a system to cause a chemical reaction.
What are the chemical intermediates?Intermediate products are more elaborate compounds, destined for the production of final products, that is, they are compounds that are included as reagents in a reaction to obtain a certain product.
On the other hand, those substances that are produced halfway through a chemical reaction are also known as intermediates.
What are the products of a chemical reaction?The products of a chemical reaction are the substances that arise after the reaction between two or more chemical substances.
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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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When written as y=f(x) a function is said to be defined
Answer:
Explicity
Explanation:
so when we have a function is y is equal to f of X. Which this is really just saying that it's only dependent on one input. Then these kind of functions are called explicitly defined.
The finishing times of a 5k race run by competitive male runners age 15-18 are approximately normal distribution with a mean time of 18 minutes and a standard deviation of 2 minutes. a particularly tough 5k race tends to take these same runners 4.5 additional minutes. to earn a completion medal in this particular 5k race, the runner must complete the race within 25 minutes. approximately, what percent of competitive male runners in the 15-18 age bracket typically do not earn a completion medal at this race?
Using the normal distribution, it is found that 0.1056 = 10.56% of runners do not earn the competition medal.
Normal Probability DistributionThe z-score of a measure X of a normally distributed variable with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex] is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score measures how many standard deviations the measure is above or below the mean. Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.In this problem, considering the 4.5 additional minutes, the mean and the standard deviation are given, respectively, by:
[tex]\mu = 22.5, \sigma = 2[/tex].
Runners that take more than 25 minutes to complete the race do not earn a medal, hence the proportion is one subtracted by the p-value of Z when X = 25, so:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{25 - 22.5}{2}[/tex]
Z = 1.25
Z = 1.25 has a p-value of 0.8944.
1 - 0.8944 = 0.1056.
0.1056 = 10.56% of runners do not earn the competition medal.
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The writer wants to add a sentence after sentence 11 to conclude the passage with a quotation that effectively restates and reinforces the overall argument. which choice best accomplishes this goal?
The best conclusion reinforces argument is;Today is the best indicator of tomorrow, but today decreases in value for points further in the future.”
How to conclude a Passage?
When we are trying to conclude a passage, we are basically trying to close out the overall text or story line with a quote or quotes that best captures the idea or argument being portrayed in the original text.
Now, the argument from the text is a relationship between today, yesterday and tomorrow and the importance of today in that regards.
Looking at the given options as seen in the brainly link below, the best choice that reinforces the overall argument is that of political scientists Joseph Coates and Jennifer Jarratt who said “Today is the best indicator of tomorrow, but today decreases in value for points further in the future.”
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Lesson 14.1 distance in the coordinate plane answer key
The distance formula, [tex]d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}[/tex], is used to find the distance between two points on a coordinate plane.
What is the Distance Formula?The distance formula, [tex]d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}[/tex], is used to find the distance between two points on a coordinate plane.
For example, given the following points on a coordinate plane:
A(2, 3) - (x1, y1)B(5, 6) - (x2, y2)Using the distance formula, we would calculate the distance as:
AB =√[(5−2)² + (6−3)²]
AB = √[(3)² + (3)²]
AB = √18
AB = 4.2
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Algebra 1: concepts, skills, and problem solving (california) solutions
An example of Algebra 1 problem solving question is (3 + a) + b².
What is algebra?The Basics of Algebra are known to cover simple math areas such as numbers, variables, multiplication, division that are found in algebraic expressions.
Looking at this question, (3 + a) + b², you collect like terms;
(3 + a) + b²
= 3a + b²
Therefore, the answer is 3a + b².
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In the summer, the arctic fox appears brown because its cells produce a dark pigment. however, in the winter, the arctic fox appears white because the dark pigment is not produced. the color change is most likely due to the effect of
Answer:
To camouflage
Explanation:
This trait was selected for because it led to better survival. In the winter the foxes would be white and blend in with the snow to hide from predators and in the summer they become darker to better blend in with the summer environment.
Describe the importance of the clay sculpture when creating bronze sculptures. (site 1)
To add emphasis to the idea that this object is different than other recent objects discussed, an audio version of this text could have a pause after "this suffragette." after "recent objects." before "mass consumption." before "this one is about."
Answer: D
Explanation: before “this is one about”
WILL MARK YOU BRAINLIST DUE TODAY
Pick one of your ideas for an essay example and write an introductory paragraph for an essay about a situation that changed your mind about something you had believed?
Answer:
I used to think it was important to conform to what other people thought about me. The day I realized it wasn’t was the day I became free.
How many ways can a person select 8 videotapes from 10 tapes?
How can the rebuttal best address the counterclaim? the rebuttal should include examples of jobs that are available to students and the problems associated with those jobs. the rebuttal should acknowledge that school remains a priority and discuss the benefits of a balance between school and work. the rebuttal should address the need for a discussion on the matter by restating both points before reaching a conclusion. the rebuttal should state a logical explanation for both opinions before granting credibility to the need for school to remain a priority.
Answer:
The rebuttal should acknowledge that school remains
a priority and discuss the benefits of a balance
between school and work.
Explanation:
Answer:
B. The rebuttal should acknowledge that school remains a priority and discuss the benefits of a balance between school and work.
Explanation:
edge 2022 <3
How do you multiply radicals containing binomials brainly
Answer:
And if we have a binomial times a binomial we'll have four products or we can think of this as double distribution. We distribute the a so we'd have a times C plus a times D.
Explanation:
If a parent cell has 10 chromosomes, how many chromosomes will be in each daughter cell?
