Urgently plz help me with social

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]

Answer and Explanation:

Spray irrigation is used because it allows water to reach the common soil with less impact, without stimulating soil compaction. In addition, this irrigation method promotes better water distribution, irrigation control, optimization of water volume, reduction of waste and better use of water by the plant. All of these benefits outweigh the high price of this type of irrigation and allow many people to prefer this irrigation over other less efficient methods.

Answer:

water is pushed from a well into an apparatus that then sprays the water across the field

Explanation:

Answer:

Multiply 4 by 16

Explanation:

Given

[tex]Rate = 1\ page/4\ minutes[/tex]

Required

Select the method that maintains her rate for 16 pages

To get the method for 16 pages, we simply multiply 4 by 16. This is shown below

[tex]Rate = 1\ page/4\ minutes[/tex]

Calculate the unit rate

[tex]Rate = \frac{1}{4} page/min[/tex]

[tex]Rate = 0.25 page/min[/tex]

For 16 pages, it is:

[tex]Rate = \frac{16 page}{4 min * 4}[/tex]

[tex]Rate = \frac{16 page}{4 min * 16}[/tex] -- Here, we multiply 4 by 16

[tex]Rate = \frac{16 page}{64\ min}[/tex]

[tex]Rate = \frac{16}{64} page/min[/tex]

[tex]Rate = 0.25 page/min[/tex]

See that the unit rates remain the same.

Other options will give different rates

Answer:

40-24 = 1616/1000 = 0.016 x 100 = 1.6% growth rate

70/1.6 = 43.75 years = doubling time.

The national population growth rate for country X is 1.6%

Crude birth rate = 38/1,000 individuals

Crude death rate = 24/1,000 individuals

Net migration rate = 2/1,000 individuals

The national population growth rate for country X will be:

= [(38 + 2) - 24] / 1000

= 16/1000

= 0.016

= 1.6% growth rate.

Using the rule of 70, the doubling time for this population will be:

= 70/1.6

= 43.75 years

Therefore, the doubling time for this population is 43.75 years.

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Answer:

T

Explanation:

egg 2021

Answer:

C Marital Status, because people want to know what kind of home the child is being placed into.

Explanation:

:)

Answer:

Marital Status

Explanation:

right on edge

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

Answer:

B.

Explanation:

The caravel was a ship used to explore the New World in the 15th and 16th Century, during the Age of Discovery. The Caravel was developed and modified from simple fishing ships to sailing ships by Portuguese to explore the African coast and the Atlantic Ocean.

The new and improved caravel made it possible for European to explore and colonize the New World. With the desire to expand their boundaries of politics, economy, religion, and science, they explored the New World using the Caravel.

Therefore, option B is correct.

false

Explanation:

i hope it helps u and ur troubles

Answer:

what is the question my guy

Answer:

A. It must meet society's needs while minimizing environmental

impact.

Explanation:

Given that sustainability is the practice of utilizing and maintaining natural resources without causing defects to biodiversity balance.

Hence, for an agricultural technique to be considered sustainable "It must meet society's needs while minimizing environmental impact."

This implies that there should be a balance between natural resource exploitation and ecological balance, such that humans can enjoy both the resources and nature without one affecting the other and at the same time, with no negative effect on humans.

Explanation:

The aggregate demand curve is downward sloping. It implies price levels are falling and the quantity of output will increase as well as the domestic income. The theories that can explain why the aggregate demand curve is downward sloping: the Pigou's wealth effect, the Keynes's interest-rate effect, and the and Mundell-Fleming's exchange-rate effect.

Answer:

yes

Explanation:

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.

Answer:

E

Explanation:

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:

Answer:

Explanation:

The answer is music found or relocated in the western hemisphere; specifically, music’s of euro-American origins, especially western classical music. Created in the tradition of European "high are" music’s. Typically composed and notated. Western art in expressions of consecutive periods and or actions, counting classical, medieval.

Based on the information given, the correct option is that he acknowledges it while suggesting Lakota stories offer a different perspective.

It should be noted that the author represents western American history written by Euro-Americans in paragraph four. This was vital in portraying his own perspective.

Therefore, he acknowledges it while suggesting Lakota stories offer a different perspective.

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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.

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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Warmer temperatures at the poles could alter wind patterns and atmospheric circulation.

Through atmospheric circulation, heat is transferred over the surface of the Earth. This has an effect on the water cycle, including cloud formation and precipitation events. The movement of air masses determines our everyday weather, and long-term patterns in circulation have an impact on regional climate and ecosystems.

This pattern, called atmospheric circulation, is a result of the Earth being heated by the Sun more at the equator than in the poles. The rotation of the Earth has an effect on it as well. In the tropics, near the equator, warm air rises.

Atmospheric circulation, or the movement of heat and air over the earth's surface, is governed by Hadley, Ferrel, and polar cells.

Thus, Warmer temperatures at the poles could alter wind patterns.

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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.

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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Answer:

d

Explanation:

Answer:

d

Explanation:

Answer:

The industrial revolution spread to other countries in Europe, because British professionals were hired by other countries.

Explanation:

The industrial revolution was a technological breakthrough that started in England and became something very profitable, making other countries want it too. However, the English government, trying to thwart competition, prohibited industrial machines from being exported to other countries, however, other European countries began to make very generous job offers to English professionals who knew how these machines work and thus the revolution industrialization started to spread.

It should be noted that the Industrial Revolution did not spread to Britain because British entrepreneurs forbade the export of machinery and skilled workers.

The Industrial Revolution was simply the transition to new manufacturing processes in continental Europe and the United States.

The Industrial Revolution did not spread to Britain because British entrepreneurs forbade the export of machinery and skilled workers.

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Answer:

AP Psych

Explanation:

In my opinion, it will take you farther in college than AP Euro or World would. You'll be suprised to find how many majors require Psychology. First, it is both a social science and biological science. If you are taking, AP bio/AP chemistry or any other science AP psych is the way to go. You go over neurotransmitters and their major functions and how relate to our behavior. I would also take this class if you have previously taken AP biology/chemistry because you will begin the class already knowing about neurotransmitters, inhibitors, and receptors. I took AP bio last year and am taking AP Psych this year and I currently have an A because I am educated on neurological functions. Even if you haven't taken bio or chemistry I would still highly suggest psychology because it prepares you for college and enhances your understanding of society and your own emotions.

Answer:

79.31%

First we need to find the total number of students.

We do that summing all the four values in the table:

Total students = 2 + 18 + 3 + 6 = 29

Then, the students that play a sport or an instrument are all student but the ones that don't play both:

Students(sport or instrument) = 29 - 6 = 23

So the probability of a random student playing a sport or an instrument is 23/29 = 0.7931 = 79.31%

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