For parts of the free-response question that require calculations, clearly show the method used and the steps involved in arriving at your answers. You must show your work to receive credit for your answer. Examples and equations may be included in your answers where appropriate. A sample of a pure element is analyzed using a mass spectrometer. The results are shown below.
(a) How many different isotopes of the element were in the sample?
(b) Describe how to use the information from the mass spectrum to determine the average atomic mass of the element.
(c) Identify the element.
(d) Write the ground-state electron configuration of an atom of the element that you identified in part (c).

For Parts Of The Free-response Question That Require Calculations, Clearly Show The Method Used And The

Answers

Answer 1

a) The sample has three isotopes

b) The average atomic mass is 24.3

c) From the average atomic mass we have magnesium

d) 1s2 2s2 2p6 3s2

What are isotopes?

The term isotopes has to do with the atoms that have the same atomic number but do not have the same mass number. The reason why the isotopes do not have the same mass number is because the number of neutrons in the element is not the same. Let us now try to answer each of the questions.

a) We can see that there are three peaks in the mass spectrum and this means that we have three isotopes in the sample as shown.

b) The average atomic mass could be obtained from the percentage abundance and the mass of the isotopes.

Average atomic mass = (0.1 * 26) + (0.1 * 25) + (0.8 * 24)

= 2.6 + 2.5 + 19.2 = 24.3

c) The element is magnesium.

d) The electronic configuration of the element is;

1s2 2s2 2p6 3s2

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Related Questions

Which of the following areas of the body has the largest number of sensory neurons, and why?
A) Back
B) Foot
C) Ear
D) Lips
E) Wrist

Answers

Answer:

D) Lips

Explanation:

The tongue, lips, and fingertips are the most touch- sensitive parts of the body, the trunk the least. Each fingertip has more than 3,000 touch receptors, many of which respond primarily to pressure.

Lips are the areas of the body has the largest number of sensory neurons. Hence, option D is correct.

What is sensory neurons?

When a person place your fingertips on a heated surface, your sensory neurons will fire, transferring what they have just learnt to the rest of your anxious system. The nerve cells that are stimulated by external sensory information are referred to as sensory neurons.

People sensory nerves give your brain information so that you can touch, taste, smell, and see things. To move and perform your daily actions, your motor nerves issue orders to your muscles or glands.

The unipolar cell bodies of sensory neurons are located in sensory ganglia, which can be found along cranial nerves or in the dorsal root of the spinal cord. The sensory system's ability to transmit environmental information is restricted by the neurons' receptive fields.

Thus, option D is correct.

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what is the difference between in the rock unit age relationship between domes and basins?

Answers

Answer:

In a dome, the oldest rocks are exposed at the center, and rocks dip away from this central point. In a basin, the youngest rocks are in the center, and the rocks dip inward towards the center.

Explanation:

Hope that helps ♡


143 9
645 -3
-4 -7 7-5
The row operation (-6)R₁ + R₂ results in

Answers

Answer:

New R2 is (0  -20  -13  -51)

Explanation:

PLEASE HELP

Review the article "Was the Salem Witchcraft Hysteria a Product of Women’s Search for Power?”

a) Summarize each author’s position on the question "Was the Salem witchcraft hysteria a product of women’s search for power?” Describe each author’s main arguments, and discuss the supporting evidence used.

b) Evaluate which author’s argument is stronger and why.

Answers

The position that the two authors had on the Salem witchcraft was of differing views. In the views of Lyle Koehler the Salem Witchcraft hysteria was due to the fact that patriarchal dominance was too much in the society, while Laurie was of the opinion that the Salem witch craft was the neurological responses to the changes that the victims had experienced at the time.

Laurie's argument is stronger because she gave a reason that can be said to be more factual

What was the Salem Witchcraft?

The Salem Witch craft was the period of hysteria that existed in the days of the American colonies due to the fact that several women in  Massachusetts were being accused of being witches and the result was that they were prosecuted based on the belief.

Those found to be guilty of being witches were killed at the time. The trial was based on the belief that the accused were practicing the magic of the devil in the colonies.

The person that has the stronger argument in the question here would be the person of Laurie. We can see this based on the fact that she said the reasons that may actually have been the cause of the actions of the women. Her argument can be backed by science. She called it neurological disorder , which is a better reasoning.

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Using this blank world map, divide up the world in a meaningful way. You can divide the world based on any parameter(s) you find useful. (You may need to do a little research for this.) After you have drawn your map, write a paragraph (no more than half a page) that explains what you chose, what your methods were for dividing up the world, and why it’s useful. Include citations!

Answers

You can use the map to divide the world in different meaningful ways, such as marking where the major religions can be found, or democracies vs dictatorships.

How to divide the world meaningfully

For this question, you must come up with a way to divide the world by using the blank map. Below you will find some ideas on meaningful ways to do come with that division:

Major religionsDemocracies X dictatorshipsClimateCapitalism X socialism / communismDeveloped X developing countries

All of the ideas above meaningfully divide the world according to different parameters. For example, a division of developed X developing countries is useful for students who wish to see how imperialism and colonization benefitted or harmed different areas of the world.

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For the following sentences please identify the signal phrases: The focus on critical-thinking skills - including analytic and quantitative reasoning, problem solving, and writing - is consistent with a shift in the way knowledge is now defined. It is more important today to be able to access, structure, and use information and apply what one knows to new problems than to remember mere facts.

The subject of this is under Communication 104 for Behavioral and Human Services

Answers

The signal phrases on the sentence include:

more important

focus

What are signal phrases?

Short words known as "signal phrases" are used to indicate to readers that a quote, paraphrase, or summary is being utilized. A signal phrase is a succinct preamble that foreshadows a quote or paraphrase to follow. When you begin a quotation or paraphrase with a signal phrase, you create a seamless transition between your ideas and the supporting data.

A change in how knowledge is now defined is congruent with the emphasis on critical-thinking abilities, including analytic and mathematical reasoning, problem solving, and writing. Today, it is crucial to be able to obtain, organize, and utilise knowledge as well as adapt what one understands to brand-new challenges. This was the message expressed in the excerpt.

The purpose of signal phrase verbs is to signify or imply that the writer is paraphrasing, quoting, or making reference to another source. The most typical verb, "says," is frequently misused. Signal words" hint at upcoming events in the text you're reading. The key to comprehending is to comprehend them.

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Please help.....

Which of the following would NOT lower the equilibrium price of a good ?
a) Lowered cost of raw materials and decreased popularity of the product b) Increased cost of raw materials and increased popularity of the product
c) More producers and fewer consumers d) More producers and a decrease in the price of a substitute good
e) A decrease in the incomes of the consumers of the good in question and decrease in the cost of production​

Answers

The answer is B because an increase in the price of resources along with an increase in quantity demanded would raise the equilibrium price

Answer: B. Increased cost of raw materials and increased popularity of the product

!!!!PLEASE HELP ASAP!!!!


Production Worksheet


The firm is in a perfectly competitive market. There are only 2 inputs: Labor (which costs you $150 per worker, labeled L in the graph) and Rent ($300, the fixed cost).


Fixed Cost= Rent = 300 Variable cost= Labor= 150 Price= 6

Answers

It is to be noted that with regard to the Production Worksheet in a Competitive Market, the completed schedule is attached accordingly.

What is a production worksheet?

The Production Worksheet assists the production planner in determining the number of goods to make.

Production planning is crucial because it produces an efficient production process based on customer and organizational requirements. It improves both customer-dependent operations (like on-time delivery) and customer-independent processes (like production cycle time).

Here is how the above values are obtained:

Note that

Q = Quantity of Total Product

MPL = Marginal Product of Labor

FC = Fixed Cost

VC = Variable Cost

TC  = Total Cost

AFC  = Average Fixed Cost

AVC  = Average Variable Cost

ATC = Average Total Cost
MC = Marginal Cost

TR = Total Revenue
VMPL = Value of Marginal Product of Labor

The quantity of Total Product for each level is the addition of that level to the Marginal Product of Labor for the next level. For example:
For Level 3 is obtained by adding 115 (Q at Level 3) + 30 (MPL at level 4) = 145.

The MPL is obtained as follows:

Using level 2 as an example, MPL for 2 is obtained by subtracting the Q for level 2 from the Q of Level 1 which in this case is 70 -40 = 30.

Fixed Cost: This is given.

Variable Cost: This is given
Total Cost: This is given

Average Fixed Cost: = Fixed Cost/Quantity. Example Level 5 AFC = 300/145

= 2.068965517241379

[tex]\approx[/tex] 2.07

Average Variable Cost  = VC /Q

For level 2 this is: 150/30 = 5

ATC = TC/Q

For level 5 this is :

1050/170

= 6.17647058824

[tex]\approx[/tex] 6.18

MC  = Change in VC/Change in Q
For level 5 this is = 150/25
=6

TR = Q * P

Recall that P = 6 (as given)

For level 5, Q= 170

Hence TR = 170 * 6

= 1020

Profit = TR - TC

For level 5 that's

1020 - 1050

= -30 (Loss)

For VMPL = MPL * P

Recall Price is 6, hence
For level 5, VMPL = 25 *6

= 150

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In 2019 the growth rate was 0.6% with a total population of about 40 million. How many people will be added the following year?

Answers

Answer:

150 million

Explanation:

3 years past

Which country has NOT used immigration to help counteract an aging population?
Spain
Japan
France
Italy
Germany

Answers

The country which has not used immigration to help counteract an aging population is: B. Japan.

What is immigration?

Immigration can be defined as the movement of a group of people from one geographical region to another geographical destination such as a city, especially in search of any of the following:

Better living conditions.WorkJobsSocial amenitiesGood governanceSecurity

Generally speaking, Japan is a country which strongly advocates and supports a pro-natalist policy rather than an immigration policy. This ultimately implies that, Japan as a country would not counteract its aging population by adopting an immigration policy.

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What part of editing is least important in fine-tuning a speech?
Punctuation
Verb tense
Vocabulary usage
Grammar

Answers

Punctuation is the part of editing is the least important in fine-tuning a speech. Hence, option A is correct.

What is meant by fine-tuning?

A radio or television receiver can be tuned by turning a control knob or bar to get the greatest reception for the desired station or channel.

An wonderful illustration of how anything can be tweaked is technology. Variables that characterize the order, composition, and material properties of their elements, such as conductivity, elasticity, and thermal expansion coefficient, have a significant impact on whether they function as intended.

In theoretical physics, fine-tuning refers to the act of changing a model's parameters with extreme precision to make it fit with specific observations.

Thus, option A is correct.

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most child safety seats are not installed properly
A. True
B. Falseo

Answers

Answer:

According to the statistics, over 90 % of child safety seats in the United States are installed incorrectly. That would make this true.

Explanation:

Answer: As of 2022 49% of child safety seats in the U.S. are installed or used improperly. About 7.5% of children 1 to 3 years old are prematurely transitioned to booster seats. One in 5 parents says it's acceptable to leave their child unrestrained for short trips.

Explanation: Why is this? Some common mistakes, according to the National Highway Traffic Safety Administration (NHTSA) are: The car seat is not installed correctly in the back seat. The car's seats straps are twisted. Or the recline angle of the car seat is not correct.

So technically this answer is true!

most child safety seats are not installed properly

A. True

B. False

PLEASE ANSWER ASAP Aim: Should students pursue medicine after graduating?

Answers

Answer: Yes and No

Explanation: Well it's based on how well or good they are with it because students who love medicine or who knows how to work with it should or maybe for some who don't know much about medicine can still learn about it so yea some students might pursue medicine after graduating and some might not

I hope this is helpful

what are liberal veiws on Keynesian economics?​

Answers

Answer:

Keynesians believe that, because prices are somewhat rigid, fluctuations in any component of spending—consumption, investment, or government expenditures—cause output to change. If government spending increases, for example, and all other spending components remain constant, then the output will increase.

Explanation:

Keynesianism is at heart a philosophy which favours a mixed economy with a role for both the public and private sectors. Now although Keynes is most associated with a liberal ideology, especially because it was practised during the depression by FDR, some would argue that it might have come out of the depression, it turns out that most mainstream liberals and conservatives do practice some form of Keynesian economics.

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