The pH shows the degree of acidity of alkalinity of a solution. The pH of the HF can be obtained from the ICE table.
What is pH?The term pH refers to the hydrogen ion concentration of a solution. Recall that acids produce hydrogen or oxonium ion in solution.
The first step to determine the pH of the HF solution is to set up the ICE table as shown;
HF + H2O ⇄ H3O^+ + F^-
I
C
E
The values of the initial concentration of HF as well as the Ka of HF are not given. If these two values are give, the pH can be obtained from;
Ka = [H3O^+] [ F^-]/[HF] Knowing that [H3O^+] = [ F^-] = x
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Fill in the blank with the correct form of the present perfect tense. ellos ___________ en california por 10 años. han vivado ha vivido han viviendo han vivido
The correct form of the present perfect tense is han vivdo. (Option D) Hence the correct sentence is:
"Ellos han vivido en California por 10 años"
What is "present perfect tense" in Spanish?In Spanish, the present perfect tense (known as el pretérito perfecto) is created to indicate actions or activities that have happened recently and/or activities that are still true.
Examples are:
(yo) He comido.I have eaten.
(ellos) Han comido.They have eaten.
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Answer: D - han vivido
Explanation:
Marine snow is _______. a. pieces of organic matter that were once part of living organisms b. a mixture of living plankton c. snow from land that has entered aquatic ecosystems d. large salt crystals that have not dissolved in ocean water please select the best answer from the choices provided a b c d
Pieces of organic matter that were once part of living organisms
Luiza’s paragraph can best be described as a(n) detailed description. Informal viewpoint. Objective summary. Personal opinion
A paragraph is a piece of writing that has a specific idea and a point. Luiza’s paragraph on Sudanese Slit Drum is an objective summary.
What is an objective summary?An objective summary is the synopsis of the text that does not includes judgments and opinion. It directly contains textual information and aids in understanding the whole text.
The objective summary includes the information directly from the text and lacks personal pronouns and perspective with no assessment of the writer.
Therefore, the paragraph is option C. objective summary.
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The director of a play must decide how much to charge per ticket. If tickets cost c dollars each, a total of (755c) people will attend the play. Which ticket price will generate the most income?
The ticket price must be kept at $7.5 to maximise revenue generated from the selling of tickets.
What is a Function?A function assigns the value of each element of one set to the other specific element of another set.
The cost of a ticket is represented by c, while the number of people who will attend the party is given by the formula (75-5c). Therefore, the total revenue that will be generated from the sale of the tickets is,
Revenue, (R) = c × (75 - 5c) = 75c - 5c²
Now, to know the maximum of the income, we must differentiate the function and then put it against 0. Therefore, the differentiation of the function will be,
[tex]\dfrac{dR}{dc} = 75-10c[/tex]
Now, if we substitute the value of the differentiated function with 0.
[tex]75-10c=0\\\\-10c =-75\\\\c = 7.5[/tex]
Hence, the ticket price must be kept at $7.5 to maximise revenue generated from the selling of tickets.
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What is the volume of the prism? whole-unit cubes fit inside the prism. quarter-cubic units fit inside the prism. the total volume of the prism is units3.
Answer:
8
2
8 1/2
Explanation:
i just did it
Answer:
8
2
8 1/2
Explanation:
i just did it
Express the alternative hypothesis in symbolic form. a professor claims that the mean amount of time (in hours) sophomores spent studying for the biostatistics final exam is more than that of freshmen. assume that the two samples are independent. let the freshmen be the first population and the sophomores be the second population.
The alternative hypothesis expression in its symbolic form is H1: u1 < u2.
What is the symbol for alternate hypothesis?The alternative hypothesis is often denoted with the code Ha or H1. One can also use the symbols or less than, greater than, etc. ( e.g. ≠, >, or <).
Note that in this case, If the professor reject the null hypothesis, then one can say that there was no enough evidence to support the claim of the alternative hypothesis. But this do not state that a claim is seen as true or false.
See options below
A) H1: μ1 = μ2
B) H1: μ1 # μ2
C) H1: μ1 < μ2
D) H1: μ1 > μ2
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Four years ago omega technology, inc., acquired a machine to use in its computer chip manufacturing operations at a cost of $35,000,000. the firm expected the machine to have a seven-year useful life and a zero salvage value. the company has been using straight-line depreciation for the asset. due to the rapid rate of technological change in the industry, at the end of year 4, omega estimates that the machine is capable of generating (undiscounted) future cash flows of $11,000,000. based on the quoted market prices of similar assets, omega estimates the machine to have a fair value of $9,500,000.
The machine's book value at the end of Year 4 given the acquistion cost and the useful life is $15,000,000.
What is the machine's book value?The book value of an asset is the cost of an asset less the accumulated depreciation. Straight line deprecation distributes the depreciation expense evenly over the useful of the asset.
Straight line deprecation expense = (cost of the asset - salvage value) / useful life
$35,000,000 / 7 = $5,000,000
Book value = $35,000,000 - ($5,000,000 x 4) = $15,000,000
Here is the rest of the question: What is the machine’s book value at the end of Year 4?
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What is the main similarity between "on virtue" and frost’s poem "mending wall"? both use everyday language. Both use a similar rhyme scheme. Both use free verse. Both use blank verse
Answer:
D on edge both use blank verse
Explanation:
The main similarity between "on virtue" and frost’s poem "mending wall" is that both use blank verse.
What is on virtue about?The poem on virtue" is a poem that talks about a lot of subjects such as Religious and Moral.
Conclusively, Note that the “On Virtue” is said to be a short poem that tells on about evangelical conversion and when view along with frost’s poem "mending wall" is that both use blank verse.
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How does the kitchen setting affect both arturo and martin
Answer:Arturo usually feel comfortable in the restaurant. But today, in the kitchen, he working for martin, who refuse to treat him specially.
Explanation:
What was the price of sft legal yesterday? a. $47.17 b. $56.11 c. $50.37 d. $61.85
Answer:
c
Explanation:
took test
Answer:
Is C. 50.37
Explanation:
I see the answer on Quizlet
A cube has a lateral area of 9 square centimeters. What is the length of each edge of the cube? 1. 5 cm 1. 5 cm2 2. 25 cm 2. 25 cm2
Answer:
1.5 cm
Explanation:
0 0
\____/
Answer:
1.5 cm
Explanation:
Britney just got a new video game for her birthday. yesterday, she played for 27 minutes and beat 3 levels. today, her parents said she can play for 45 minutes.
Answer:
5
Explanation:
27 divided by 3 is 9
9 x 5 is 45
britney can play 5 more levels
People with schizophrenia often have disturbed perceptions, such as __________, which are sensory experiences without sensory stimulation
Answer:
the word in the blank is: Hallucinations
Explanation:
hope this helped
When white light is passed through a diffraction grating, the color closest to the center bright spot corresponds to ?
One message that i learned from the text is that acting with kindness is more important than following the rules
Answer:Not really
Explanation:
If your being kind to someone thats great but breaking the rules to be kind to them is not great. Its like saying that i was being kind to some because they asked me to steal something for them.
Consult a current dictionary or other reference book and write a brief definition of technology.
Answer:
The application of scientific knowledge for practical purposes, especially in industry. Machinery and equipment developed from the application of scientific knowledge.
Explanation:
Good luck on the test bro
If 6 newborn babies are randomly selected, how many different gender sequences are possible? a. 720 c. 12 b. 36 d. 64 please select the best answer from the choices provided a b c d
Answer:
c
Explanation:
A pendulum is made by tying a 75 g ball to a 130-cm-long string. the ball is pulled 5.0∘ to the side and released.
The ball’s speed and direction at the lowest point of trajectory are; 3.1 m/s and swing to the same angle on the other side
What is the speed at the lowest point?We will assume that all of the motion will transfer to Kinetic Energy at the lowest point. Now, the difference in height will be;
Δh = (130 – 130*cos °5) = 0.49 cm
The change in PE is;
ΔP.E = mgΔh
ΔP.E = 9.8m/s² × 0.75kg × 0.049 m
ΔP.E = 0.36015 J
Formula for kinetic energy is;
K.E = ¹/₂*m*v²
From conservation of energy;
K.E = P.E
Thus;
¹/₂* 0.075 * v² = 0.36015
v = √[(0.36015 * 2)/0.075]
v = 3.1 m/s
Thus, the pendulum will swing to the same angle on the other side.
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A student government organization is selling christmas trees
Answer:
To raise money.
Explanation:
Because they need it and people need Christmas trees
Christine wants to buy a bicycle for her little brother. she receives a coupon in the mail for 5% off of a bicycle purchased at bikes and wheels. the bicycle her brother wants is $79. if she already has $50 saved, how much more does she need to purchase the bicycle using the coupon?
The amount she needs more to purchase the bicycle using the coupon is = $25.05
Calculation of total costThe coupon Christine received from the mall = 5% off sales
The cost of the bicycle the brother wants is = $79
The amount she has saved is = $50
The amount she needs more to purchase the bicycle using the coupon is = X
But, 5% of 79 = 5/100× 79
= 395/100 = $3.95
This means that given the coupon she will purchase the bicycle = 79 - 3.95 = $75.05
Therefore X = $75.05 - $50
= $25.05
Therefore, the amount she needs more to purchase the bicycle using the coupon is = $25.05
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A company makes two different sized ice cream cones
Answer:
A company makes two different-sized ice cream cones. The smaller cones are 3.5 inches tall and have a diameter of 3 inches.
What do readers learn about the setting in this excerpt? the weather is cloudy on the day of the party. The community anxiously awaits the gathering. Only a few neighbors are invited to the party. Only bilbo is concerned with the weather
Answer:
B
Explanation:
The community anxiously awaits the gathering.
The community anxiously awaits the gathering readers learn about the setting in this excerpt. Thus, option B is correct.
What is an excerpt?An excerpt can be defined as when a person needs the reader or listener to know some important things but want to say. From a bigger paragraph or a sentence, only a small part is taken then that part is called an excerpt.
The excerpt from the fellowship of the organization suggests that People were just really worried about the turnout on the evening well before the party because it was cloudy outside.
Thus, on September 22nd, the day preceding the celebration, the sun rose, the clouds parted, the flag got flown, and the excitement got started. The event then got started. Therefore, option B is the correct option.
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The question is incomplete, the complete question is:
Read the excerpt from The Fellowship of the Ring. Then the weather clouded over. That was on Wednesday the eve of the Party. Anxiety was intense. Then Thursday, September the 22nd, actually dawned. The sun got up, the clouds vanished, flags were unfurled and the fun began. Bilbo Baggins called it a party, but it was really a variety of entertainments rolled into one. Practically everybody living near was invited. A very few were overlooked by accident, but as they turned up all the same, that did not matter.
A job candidate at a large job fair can be classified as unacceptable
Answer:
True
Explanation:
There are 3 different classifications:
-unacceptable
-provisional
-acceptable
Give your own position on human trafficking in south africa brainly
Human trafficking in South Africa is still a critical problem that must be tackled with laws protecting citizens and actively combating this situation.
How to abolish human trafficking?It is essential that there are consistent government measures to control and combat this situation, to extinguish this situation that violates the human rights to life, security and liberty.
Therefore, every human being has the right to the protection of their essential rights, and it is up to the government of a country to implement strict rules and laws to combat human trafficking and promote better life opportunities.
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What is the biggest weakness of da vinci’s argument? he incorrectly concludes that other stars do not have their own light. he relies on his own personal feelings and preferences. he suggests that the sun helps sustain life on earth. he relies too much on others’ points of view.
Answer:
A- He incorrectly concludes that other stars do not have their own light.
Explanation:
Edge 2022 ;)
Answer:
The answer is indeed A.
Explanation:
How many electrons in an atom can have each of the following quantum number or sublevel designations?
Answer:
Only one electron in a given atom can have the set of quantum numbers given in the question.
The student hypothesizes that a greater fraction of kinetic energy is lost from the system during the collision when the speed of the first cart is greater.
A greater fraction of kinetic energy is lost from the system during the collision when the speed of the first cart is greater due to inelastic collision.
What is kinetic energy?It should be noted that kinetic energy simply means a form of energy of an object due to motion.
In this case, a greater fraction of kinetic energy is lost from the system during the collision when the speed of the first cart is greater due to inelastic collision.
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Tammy’s last four homework scores were 68, 76, 70, and 74. The mean absolute deviation of her scores is. Tammy worked hard on yesterday’s assignment and feels confident that this homework score will be at least a 90. Predict what will happen to her mean absolute deviation if she is correct:. Tammy was correct. She earned a 92! the new mean absolute deviation of her homework scores now that they are 68, 76, 70, 74, and 92 is:
With data of 68, 76, 70, and 74,
The mean absolute deviation of the set of scores that Tammy has is given as 3.The prediction is going to be that her MAD would go up.With Data of 68, 76, 70, 74 and 92, her MAD is 6.4How to solve for the Mean Absolute deviation (MAD) on excel1. To solve this, I made use of the excel formula
This is formula is given as =AVEDEV(A1:A4)
The MAD in the first part is = 3
The data in the first part is contained from A1 to A4
2. If Tammy happens to be correct then the prediction for his absolute deviation is that it is going to go up.
3. After earning a 92, her MAD is going to be:
=AVEDEV(A9:A13)
= 6.4
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How does the time period of the setting in "part 1: a son's adventures" shape penelope?
Answer:
It forces her to have to outwit her suitors instead of having the option to merely refuse them.
book : Odyssey
Penelope is Odysseus' wife
Odysseus is far away
Other people men want marry Penelope because they think
Odysseus is dead
Penelope tells her suitors that she will marry one of them when she finishes a weaving, a burial shroud for Laertes, Odysseus's father.
As she weaves the shroud during the day, at night, away from the eyes of the suitors, Penelope undoes the weaving that she had done that day.
studycom
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Acids increase the concentration of hydronium ions in solution by donating hydrogen ions to water molecules.
Answer:true
explanation:
If the hydronium concentration increases, the pH decreases, causing the solution to become more acidic. This happens when an acid is introduced. As H+ ions dissociate from the acid and bond with water, they form hydronium ions, thus increasing the hydronium concentration of the solution