Answer:
T
Explanation:
egg 2021
Concentrated nitric acid has a molarity of 15.9 M and a density of 1.42 g/mL. Calculate the following concentrations using 1.00 L of HNO3.
a) % by mass
b) molality
c) mole fraction
Answer: a) percent by mass = [tex]70.5\%[/tex]
b) molality = 38.01mol/kg
c) mole fraction = 0.40
Explanation:
Given molarity = 15.9 M
moles of [tex]HNO_3[/tex] = 15.9 moles in 1.00 L of solution
mass of [tex]HNO_3[/tex] = [tex]moles\times {\text {Molar mass}}=15.9mol\times 63g/mol=1001.7g[/tex]
Density of solution of = 1.42 g/ml
Volume of solution = 1.00 L = 1000 ml
Mass of solution = [tex]Density\times volume= 1.42g/ml\times 1000ml=1420g[/tex]
mass of solvent = mass of solution - mass of solute = (1420-1001.7) g = 418.3 g = 0.4183 kg
moles of solvent = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{418.3g}{18g/mol}=23.2mol[/tex]
percent by mass =[tex]\frac{\text {mass of nitric acid}}{\text {mass of solution}}\times 100=\frac{1001.2}{1420}\times 100=70.5\%[/tex]
molality = [tex]\frac{\text {no of moles of solute}}{\text {mass of solvent in kg}}=\frac{15.9mol}{0.4183kg}=38.01mol/kg[/tex]
mole fraction = [tex]\frac{\text {moles of solute}}{\text {total moles}}=\frac{15.9}{15.9+23.2}=0.40[/tex]
Please answer. Very urgent. All 3 questions. <3
Answer:
a. each particle of matter vibrates about its normal rest position and along the axis of propagation,
b. Liquids
C. because liquids have the right amount of space between them for the wave to pass through quickly
Explanation:
In which of the following states would gerrymandering have the LEAST impact?
O A state in which there are a variety of ethnic groups living in each district
O A state in which there is an even split among the political party groups within the state
O A state in which 95 percent of citizens belong to the same political party
O A state in which there is a strong third-party presence
O A state in which a proportional-election system is practiced
Answer:
c
Explanation:
Answer:
A state in which 95 percent of citizens belong to the same political party
Explanation
i took the exam i got it right
The Porter family budget in the new city is shown in the
graph. Of the seven expenses shown, which of the
following is fixed?
O housing
O food
clothing
medical
Answer:
Housing!!!
Explanation:
Answer:
A:Housing
Explanation:
Did it on edge 2021
What has happened to many families when they can not make their mortgage payments?
Answer: many families lose there homes and may become homeless
Explanation:
They lose there homes because they have to pay mortgage and If they don't they take away there homes
If you can guess my name or come close to it I'll give you brainliest
Answer:
amanda?
Explanation:
Answer:
John :I
Explanation:
what does blood type mean and why does it matter
do i ask a girl out on a date?
Answer:
Be a gentleman
Explanation:
I got a GF
The local movie theater decided to raise the ticket prices 75% . The original ticket prices were $12 . Set up the percent equation to find the amount by which the ticket prices rose. Then find the amount.
Answer:
New price = Initial price(1.75) ;
$21
Explanation:
Given that:
Original price = $12
Percentage increase = 75%
The percent equation :
Initial percentage = 100%
Proposed % increase = 75%
New price = initial price(100% + 75%)
New price = Initial price(1 + 0.75)
New price = Initial price(1.75)
The New price is thus ;
$12 * 1.75 = $21
If the students of Santa Fe High School still wished to pray before home football games, explain how they could accomplish this without violating the First Amendment, as stated by the Court.
Answer:
Santa Fe Independent School District v. Doe, case in which the U.S. Supreme Court on June 19, 2000, ruled (6–3) that a Texas school board policy that allowed “student-led, student-initiated prayer” before varsity high-school football games was a violation of the First Amendment’s establishment clause, which generally prohibits the government from establishing, advancing, or giving favour to any religion.
the issue that eventually reached the U.S. Supreme Court concerned a policy that called for students to vote on whether prayers would be delivered prior to football games and to select a student who would deliver them. After the students approved the inclusion of prayers at the game, a federal district court ruled that only nonsectarian and nonproselytizing prayers could be delivered. The Fifth Circuit Court of Appeals, however, ruled that any football prayer was unconstitutional, as a violation of the establishment clause.
The school board contended that control of the pregame message was left to students who also chose the speaker and the content of the message by a majority vote. Thus, according to the board, the prayer qualified as “private speech” and was protected by the First Amendment’s free speech and free exercise clauses. However, the court ruled that The court was of the opinion that the policy would only lead to student messages that were, rather than private speech, actually religious speech directly sponsored and endorsed by a governmental agency.
In 2000, the Supreme Court ruled in the case of Santa Fe Independent School District v. Doe that student-led prayer at public school events, such as football games, violates the Establishment Clause of the First Amendment.
What is First Amendment?The United States Constitution's First Amendment is part of the Bill of Rights, which was ratified on December 15, 1791.
In the case of Santa Fe Independent School District v. Doe, the Supreme Court ruled in 2000 that student-led prayer at public school events, such as football games, violates the Establishment Clause of the First Amendment.
As a result, school officials are not permitted to organise, promote, or participate in student-led prayer at these events.
Individual students, however, are not prohibited from praying before, during, or after school events on their own or with other like-minded students.
Students are free to express religious beliefs as long as they are not school-sponsored, school officials do not endorse or promote it, and it does not interfere with the educational environment or the rights of others.
Thus, this way, they could accomplish this without violating the First Amendment, as stated by the Court.
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How did slaves manage to “survive” slavery?
Answer:
some slaves payed there way out via lottery tickets others became free from escaping vai the rail road if none of those they survived from listening to there master and not rebailng bc of the harsh punishments
Which of the following pairs accurately matches the food or animal with its point of origin?
Africa: sweet potatoes, bell peppers, pineapples, turkeys
South America: cattle, goats, bananas, barley
North America: horses, pigs, wheat, sugar
Europe: potatoes, coffee, cattle, onions
Africa: chickens, peas, sheep, radishes
Answer:
Africa: chickens, peas, sheep, radishes
Explanation:
The pair which matches the food or animal with its point of origin is; Africa: chickens, peas, sheep, radishes
African origin of sheeps:Archaeological information supports separate introductions and dispersion histories for the African thin-tailed and fat-tailed sheep. The first sheep entered Africa via the Isthmus of Suez and/or the southern Sinai Peninsula, between 7500 and 7000 BP.
Additionally, chickens, peas and radishes also found their origin with Africa.
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Whoever answers this first gets 70 pts. and Brainliest :D
Answer: THANK S :)
Explanation:
Thanks for your points..
Urgently plz help me with social
Answer:
The Vietnam War different from the Korean War is explained below in detail.
Explanation:
The main distinction between the Vietnam War and the Korean War was that the Vietnam War concluded in an expansion in the empire for communist powers, but the Korean War did not.
The Vietnam War concluded with a communist success, where North Vietnam joined the regions of South Vietnam, joining them under the designation of the Socialist Republic of Vietnam.
The Korean War, on the other hand, finished in a status quo ante Bellum, with minimum territorial adjustments, and without a definite victor. Therefore, North Korea, socialist, and South Korea, capitalist, controlled their regions, a situation that continues until today.
Which student is doing the best based on a number-grading system? ill a give a brainilest
The student that is doing the best is Julia because she has the highest score.
What is a number-grading system?In education, number-grading systems are systems based on numbers used to measure students' performance. There are two common systems all around the world.
1 to 10: In this system, the highest grade is 10 and the lowest grade is 1. This means a student that is given a 1 is performing poorly.1 to 5: This system is quite similar to the first system because 5, which is the highest number represents the best performance.What student is doing the best?The student that is doing the best is Julia, she got a score of 5 and therefore she is the one that has the best performance on the coursework.
Note: This question is incomplete because the options are not given; here is the missing part.
Julia, who scored a 5 on her coursework.
Samuel, who scored a 1 on his coursework.
Mariana, who scored a 3 on her coursework.
Benjamin, who scored a 4 on his coursework.
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What is the purpose of selective attention?
To allow you to ignore things that are important
To pay close attention to whatever is most important
To ensure you can give all stimuli your complete attention
To ensure that all information is encoded into long-term memory
To increase the capacity of sensory memory
Answer:
To Pay close attention to whatever is most important.
Explanation:
Selective attention allows us to focus on one thing in particular, while ignoring other information happening around us.
Answer:
To pay close attention to whatever is most important.
Explanation:
Selective attention enables us to focus on one particular input while ignoring irrelevant or distracting information.
What affects the pH of rain?
Group of answer choices
burning fossil fuels
increased precipitation
increased biodiversity
increased vegetation
a woman shoots her husband, held him underwater for 5 minutes and then they enjoy the best dinner ever, explain (riddle try your best)
Develop an argument that evaluates how the Columbian Exchange affected peoples in Afro-Eurasia in this time period.
By far the most dramatic and devastating impact of the Columbian Exchange followed the introduction of new diseases into the Americas.People who lived in Afro-Eurasia had developed some immunities to these diseases because they had long existed among most Afro-Eurasian populations.
hope this helps!
The evaluation of the effect of the Columbian Exchange on the people in A''fro-Eurasia is that there was the introduction of new diseases.
What is Social Interaction?This refers to the mingling between people of different societies and civilizations where they meet and exchange ideas and cultures.
Hence, we can see that through the Columbian Exchange, there was a social interaction between the explorers and the peoples of A''fro-Eurasia which brought them new diseases that killed them in droves.
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Slaveholders claimed they treated slaves better than factory owners treated their workers. Is this a valid comparison? Explain.
Answer:
I dont think it is
Explanation:
Coming from a black person the way that slave owners treated black people was inhumane. We wre literally publically mocked and beaten. No one honestly had to go through that but black people. And till this day it still hurts and puts a nasty taste in my mouth about slave holders or owners
Which of the following is NOT an example of a daily routine used as a teaching strategy?
a. Nap time
b. hand washing
c. Sharing toys
d. Restroom breaks
Answer:
Sharing toys
Explanation:
I'd say sharing toys sense we are going through a pandemic it's not very smart to be sharing things that other people have touched.
True or false CIE stands for Contemporary Issues in Education.
false
Explanation:
i hope it helps u and ur troubles
How did slaveholders justify slavery? How did that defense change over time?
Answer: Slaveholders justified slavery because they needed workers to help them. For example, the Portuguese began the trans-Atlantic slave trade because they needed hard labor done for the cultivation of sugar in South America. However, as time went on people began to recognize the downfalls of slavery and how it is unjust to the slaves.
Explanation:
If you’re driving a car and know there’s a motorcyclist around you, you should______.
A. not change your driving
B. check your blind spots frequently
C. remind them to wear a helmet
D. make wider turns than normal
If you’re driving a car and know there’s a motorcyclist around you, you should B. check your blind spots frequently.
What is blind spots frequently?
A blind spot is a vicinity or region on the street outdoor the driver's discipline of vision. Essentially, it is the vicinity that can't be visible with the aid of using searching ahead thru your windscreen, or with the aid of using the use of your rear-view and side-view mirrors, and this is hidden with the aid of using elements of the vehicle's structure.
If you’re driving a car and know there’s a motorcyclist around you, you should B. check your blind spots frequently.
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Answer:B
Explanation:
i give 99 points and you give branist i did this 3 times
Answer:
thanks
Explanation:
18. Reasoning Explain why a hybrid is considered
to be a fuel-efficient vehicle.
Explanation:
Most people are aware that hybrid electric vehicles are more fuel efficient than conventional gas powered vehicles. ... The one reason that is usually cited is regenerative braking where the electric motor applies resistance to the drivetrain, and the energy from the wheels helps turn the motor and acts like a generator
Refer to the passage. "Finally, in one word, their Ambition and Avarice, than which the heart of Man never entertained greater, and the vast Wealth of those Regions; the Humility and Patience of the Inhabitants (which made their approach to these Lands more [easy]) did much promote the business: Whom they so despicably condemned, that they treated them (I speak of things which I was an Eye Witness of, without the least fallacy) not as Beasts, which I cordially wished they would, but as the most abject dung and filth of the Earth; and so [solicitous] they were of their Life and Soul, that the above-mentioned number of People died without understanding the true Faith or Sacraments. And this also is as really true as . . . that the Spaniards never received any injury from the Indians, but that they rather reverenced them as Persons descended from Heaven, until that they were compelled to take up Arms, provoked thereunto by repeated Injuries, violent Torments, and injust Butcheries.”
(Excerpt from A Brief Account of the Destruction of the Indies (1542), written by Spanish colonist and bishop Bartolomé de Las Casas)
The views expressed in the passage are best seen as evidence of which of the following effects of colonialism?
- Unprovoked attacks by indigenous peoples against settlers
- Cooperation and trade between settlers and indigenous peoples
- The spread of settlers’ religious beliefs among indigenous peoples
- The displacement and murder of indigenous peoples in conquered lands
thanks for anyone who decided to help me out!
Answer: I believe it is D: - The displacement and murder of indigenous peoples in conquered lands
Explanation: I was reading up on it. It makes the more sense out of all of them.
The aboriginal inhabitants suffered greatly as a result of European colonization of North America. Their way of life underwent a quick but permanent transformation. Numerous circumstances, such as the loss of land, illness, the imposition of laws that went against their culture, and much more, contributed to the changes. Thus, option D is correct.
What murder of indigenous peoples in conquered lands?Colonization caused significant ecosystem disruption, which resulted in the eradication of certain species while introducing others.
The various diseases that the Europeans brought to North America killed out entire Native American populations. Native Americans and European settlers both looked for novel plants that may be used as medicines.
Massive deaths from war or the spread of foreign diseases, most notably smallpox, were among the immediate effects of colonialism on Aboriginal groups. Other immediate effects included land confiscation, disruption of traditional ways of life, cultural practices, and language, or complete disconnection from them.
Therefore, The displacement and murder of indigenous peoples in conquered lands
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PLEASE HELP!
Answer the following in several complete sentences:
Explain how genetics influence temperament and temperament affects attachment.
Answer:
A baby's genetics can affect its temperament. Sometimes a baby will be well-tempered, they will eat, sleep, and play like a normal baby this will make them loving toward their caregiver and form a better attachment. On the other hand If if the child has a bad temper they will not sleep on time have difficulty eating and will become extremely irritable towards anyone. This will make it hard for it to form an attachment toward the caregiver due to the irritability.
Explanation:
Genetics is known to influence temperament. This is when some specific gene variations do contribute to some traits that are linked to temperament.
An example is, when a known genetic variants in the DRD2 and DRD4 genes is said to contribute to a key temperament or zeal that to seek out new experiences.Other studies has shown that KATNAL2 gene variants is liked to temperament such as self-discipline and carefulness. Studies has shown that about 20 to 60 percent of temperament is because of genetics.
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Oscar and his friends went to a movie on Thursday afternoon. They left at 1:50 P.M. It took 1 hour to drive to the theater. They arrived at the theater 55 minutes before the movie started. Once it started, the movie lasted for 1 hour and 30 minutes. What time was it when the movie ended?
HELP ASAP
Answer:
4:35
Explanation:
If the left at 1:50 and got there 1 hr later, it would be 2:50. then they arrived 55 mins. later, which would be 3:05. Then the move lasted 1 hr 30 mins long, so they left at 4:35 PM
Answer:
4:35 is when the movie ended
Explanation:
1:50 + 1 hr = 2:50. 2:50 +55 mins = 3:05. 3:05 + 1hr and 30 mins = 4:35 PM
What’s the song by the lyrics; whoever gets them right gets brainleist. Ima do more in the future.
1. I remember years ago someone told me I should take caution when it comes to love 2. Laying in the silence waiting for the sirens signs any signs I’m alive still
3. Shooting for the stars always had a vision
4. Don't start caring about me now Don't come out Don't show up Don't start now
5. Did somebody, did somebody Break your heart? Lookin’ like an angel But
6.You know it used to be mad love So take a look what you've done 'Cause, baby,
7. No, I can't sleep until I feel your touch I said, ooh, I'm drowning in the night Oh,
8. All seem to say throw cares away Christmas is here bringing good to cheer to....
9. Was their something I could have said to make it all feel better I wish I knew you had a storm to weather so.....
10. Why u always in the mood ******* around actin brand new I ain’t trying to tell you what to do but....