The vapour pressure of pure benzene at a certain temperature is 0.850 bar. A non volatile, non electrolyte solid weighing 0.5 g is added to 39.0g of benzene. The vapour pressure of the solution then is 0.845 bar. What is the molecular mass of the solid substance​

Answers

Answer 1

Answer:

The molar mass is 169g / mol.

Explanation:

To achieve this result you must consider the formula:

[(pº-p) / pº] = [na / (na + nb)]

This formula should be replaced by the values shown in the question as follows:

pº = 0.850 bar

p = 0.845 bar

To find the values of "na" and "nb", we will consider that the letter "m" represents the molecular mass of benzene that is equal to 78, so we have:

na = 0.5 / m; nb = 39/78 = 0.5

Now we can replace all values in the formula:

0.850-0.845 / 0.850 = (0.5 / m) / (0.5 / m) +0.5 =

0.5 / (0.5 = 0.5m) =

1/1 + m =

m = 0.850 / 0.005 - 1 = 169g / mol


Related Questions

What does the sentence most likely mean?
Tess was crying hard.
Tess was running around.
Tess was feeling playful.
Tess was out of control.

Answers

Answer:

tess is out of control and might be bipolar

Explanation:

Which of the following would be a primary source if you were writing an essay on Betsy Ross’s life?

A. A newspaper interview with Betsy Ross’s children.
B. An encyclopedia entry about Betsy Ross’s life.
C. An article written by a biographer 10 years after Betsy died
D. A letter from Betsy Ross to her husband

Answers

Answer:

I would think it's B

‼️

I have no explanation because it's instinct

Answer: i think the answer is B

Explanation: bc its kinda abvios

In your words indentify how the text suggests determining your point of view; using two examples

Answers

Answer:

Is there suppose to be a photo of the text?


37 Somebody has cooked this fish very well. (into active)

Answers

Answer:

Somebody is cooking the fish very well

Explanation:

Active means it's still happening so there it is

He couldn’t find his passport. Later, it…………..among his friend’s books.​

Answers

Answer:

IT Will among his friend's books


Caroline just found a term in her book that she does not understand. However, the term was not in her glossary.
What resource should Caroline consult?
OA. dictionary
ОВ.computer database
OC. index
OD. encyclopedia

Answers

Answer:

A. Dictionary

Explanation:

 You should always use a dictionary, or if you don't have one, a thesaurus or encyclopedia. But, in most cases, you will want to use a dictionary, because it will give you accurate definitions.

Hope this helps :)

Which word contains the suffix "-en"?
O harden
O entertain
O sensation
O tension

Answers

Explanation:

the answer is harden because -en is a suffix

Harden because it has en at the end

Read the following paragraph and answer the question.
George Washington was born on February 22, 1732, in Westmoreland County, Virginia. Contrary to popular
belief, his teeth were not made of wood. By the age of twenty-three, he had already established himself as a
military hero in the French and Indian War. Four years later, he met and married Martha Dandridge Custis, a
young widow whose husband had died. Although they raised Martha's children from her previous marriage
and two of their grandchildren, the couple never had any children of their own. Washington died two years
before his wife. He became active in local politics and eventually became a leader in speaking out against the
magisterial British rule. When war broke out in 1775, he was chosen as commander-in-chief of the American
troops. At the end of the war, he was unanimously elected the nation's first president. He served two terms
and then retired to his home, Mount Vernon. He died on December 12, 1799, from pneumonia and bad
weather.

In terms of content, what should be changed?

there should be more comments and fewer facts
It should be more factual
it contains unrelated information
it is correct as it is written​

Answers

Answer:

it is correct as it is written.

it included his information.

We went to the cinema but we didn't see the film. (though)

Answers

Answer:

we went to the cinema but though we didn 't see the flim

Explanation:

Excerpt from Jackie Robinson - Accomplishments
http://en.wikipedia.org/wiki/Jackie_robinson
(8) Robinsons final fewiyears were marked by tragedy.
Read the passage underlined (8). There may be a mistake in punctuation, capitalization, or spelling. If you find a mistake, choose the
answer that corrects the mistake. If there is no mistake, choose 'Correct as is.'
A)
Correct as is.
B)
Robinson's final few years were marked by tragedy.
C)
Robinsons final few year's were marked by tragedy.
D)
Robinsons' final few years were marked by tragedy.

Answers

Answer: B. Robinson's final few years were marked in tragedy.

I got a test of 21 questions leave your number if you answer them and get 80 percent on I’ll pay you if you get 100 I’ll pay really good

Answers

how much will you pay

Nights and Dragons—
From the memoir of author Abigail Prynne

I could have given up, but I thought about my grandmother. She always told me that "people who believe that science is the answer to everything are missing out on everything else." With her words in mind, I searched some more. There were many facts that hinted that dragons may not be fictional. I noticed that cultures across the world all described dragons in similar ways. This was odd because they had no way to communicate with each other. I found dragons mentioned in more than just stories. They appeared in old legal papers, in the travel logs of Marco Polo, and in the Bible. I saw that the Chinese calendar uses a different animal each year. Dragons are included along with eleven real animals. I began to believe it was a real possibility that all of these people were talking about a creature that actually existed.


The text discusses the Chinese calendar by writing, "Dragons are included along with eleven real animals."

What does that imply?

Dragons are the only fake animal on the Chinese calendar.
Dragons are not the only fake animal on the Chinese calendar.
Dragons are real because all the other animals on the calendar are fake.
Dragons are real because all the other animals on the calendar are real.

Answers

[tex]Hello![/tex]

According to me, it is the option:

B. Dragons are not the only fake animal on the Chinese calendar.

How do the Student, Alive, and Reasons sections of the North Star work together?

Answers

Answer:

The following is a way the Student, Alive and Reasons sections of the North Star works:

The Student section: Here, the student writes down his goals for the next quarter or semester. Such goals must be achievable.

The Alive section: In this section, the student writes out certain activities which he will engage in within the period of his student goals which will keep him energetic and happy. This section is important because it's a goal driver and motivator which will energize the student in achieving the goals set in the Student section. Such activities may be writing, dancing, engaging in challenges, traveling, etc.

The Reasons section: In this section, the student states his reasons (the WHY) for accomplishing the goals set in the Student section. These reasons serve as a motivation. He describes WHY he wants to do the things he has put down in his North, Student, and Alive sections.

Explanation:

The NORTH STAR is a tool used to enable and assist students to plan, reach and achieve their goals. It has five parts:

1. North

2. Student

3. Tools

4. Alive

5. Reasons


b. How were Aristotle's and Socrates ideas different

Answers

Answer:

while socrate casted fatalistic and monolithic  depositions in his analysis and elaborated his thoughtsin dialetic form, Aristotles in contrast embraced freedom of choice and diversity and articulated the importance of contingent particularity of historical experience.

Explanation:

In "The Grapes of Wrath", Mae wants the man to buy a sandwich and not treat the diner as a grocery store.

Answers

Answer: True

Explanation:

In The Grapes of Wrath, Mae and Al run a diner on the way to California. On this particular day, a poor family came in and wanted to buy a loaf of bread for a dime. Mae replied that they do not sell bread as it was a diner not a grocery store and that the man should buy a sandwich instead which he could not afford.

In the end, after some prompting from her husband Al, she sells the loaf of bread to the man and shows an extra kindness to his children by underselling some candy to them.

Answer:

True

Explanation:

cause i said so

[Nora:] Tell me, is it really true that you did not love your husband? Why did you marry him?

Mrs. Linde: My mother was alive then, and was bedridden and helpless, and I had to provide for my two younger brothers; so I did not think I was justified in refusing his offer.

Nora: No, perhaps you were quite right. He was rich at that time, then?

Mrs. Linde: I believe he was quite well off. But his business was a precarious one; and, when he died, it all went to pieces and there was nothing left.

–A Doll’s House,
Henrik Ibsen

Which statement best explains how Mrs. Linde’s character archetype of the caregiver develops the theme that women make sacrifices in society?

Mrs. Linde had no freedom of choice when her husband proposed to her.
Mrs. Linde happily accepted her husband’s proposal.
Mrs. Linde has chosen to live a life of freedom with male influence.
Mrs. Linde, as a single woman, demonstrates that society thrives through equality.

Answers

Mrs. Linde had no freedom of choice when her husband proposed to her.

Hope this helped ♥︎

Answer:A

Explanation:

In a five-minute oral report, compare and contrast the novel and film versions of To Kill a Mockingbird. Compare and contrast the ways in which related themes are treated differently in each medium with a particular focus on the theme of moral courage. Compare and contrast the effectiveness of each treatment the way various themes are treated in each media.

Answers

Answer:

Through its definition, movie is a graphical technique that makes it impossible to convey a first-person narrative. To make Scout narrate the entire film as she did in the novel would be confusing, but Scout as a protagonist is just used to establish the tone of the situation during the film.

Lee 's book is a coming-of - era tale inspired by a significant incident in the world and inside a single entity. For only does Scout struggle to grasp and navigate the case, but she's still grappling with the perceptions of the little girls around her. The storey, on the other side, is a legal drama that seems to have something regarding the life at home of a senior lawyer.


22. Thinking about and questioning your studies
a. takes too much time
b. makes you a more active learner
c. doesn't help you remember more about what you read
d. makes you a more passive learner
SC
S
23. Learning experts state that if you a chapter, you will increase your
learning effectiveness by 25 percent or more.
a. plan and scan
b. skip over
c. copy
d. don't understand
24. When planning and scanning,
a. skip the introduction
b. identify your learning objectives for the chapter
c. only read charts and graphs in the chapter
d. read the entire chapter immediately

Answers

Answer:

22 b

23 a

24 b

hope it helps

You, the commissioners, have come from afar to listen to our grievances. My heart is glad and I shall hide nothing from you. I understood that you were coming down to see us. I moved away from those disposed for war, and I also came along to see you.

How does Satanta’s humble tone affect the meaning of his speech?
It causes those who are listening to wonder what motive Satanta has for being so polite and genial.
It assures those who are listening that Satanta is speaking with honesty and has acted in good faith.
It reminds those who are listening that they should appreciate how far Satanta has traveled to meet with them.
It reinforces for those who are listening that Satanta is not afraid of war should he deem it necessary.

Answers

Answer:

The answer is B

"It assures those who are listening that Satanta is speaking with honesty and has acted in good faith."

Explanation:

Answer: It assures those who are listening that Satanta is speaking with honesty and has acted in good faith.

Explanation: so B

Help me please……………………..

Answers

B is the correct answer they give u short goals to shoot for

According to the passage, what is one purpose of dance rituals in Iroquois culture?

Answers

Answer:

answer is to ensure the harvest.

Explanation:

Iroquois tribe is a native American Confederacy. They are well known as the Iroquois league who fought during the Colonial years. They are also known for being the Iroquois Confederacy. Their culture is very interesting and they make dance rituals in order to ensure the harvest.  

B) to ensure a good harvest

Please answer the question
Paragraph writing​

Answers

B. Match the following:

a) personnel - staff

b) reputed - prestigious

c) resume - a brief account of somebody's career

d) established - set up

e) recent - latest

5. A film in which strange and frightening things happen is called a/an .
A. thriller B. comedy C. drama D. animation
6. Lan brushes her teeth every day, ..................... she doesn’t have toothache.
A. but B. and C. so D. although
7. We didn’t find it funny it was a comedy.
A. in spite of B. despite C. although D. but
8. Oil, coal and natural gas are ......................................resources.
A. modern B. new C. non-renewable D. renewable
9.La Tomatina on the last Wednesday of August every year.
A. hold B. held C. is held D. be held
10. Your mother’s here,.....................?
A. isn’t she B. are she C. is she D.aren’t she
11. At this time next week, we a wind turbine in our garden.
A. will installed B. will be installing C. install D. installed
12. Low energy light bulbs should be used to electricity.
A. convert B. save C. spend D. buy
13.Nuclear power ............................................. in the future.
A. replaces B. replaced C. will replace D. will be replaced
14. The house………before my brother comes home.
A. will clean B. will be cleaned C. will be cleaning D.clean
15. At this time tomorrow, They.............................. a test on sources of energy.
A. will take B. will be taking C. are taking D. take
16 John didn’t see her, .......................?
A. do John B. did he C. did John D. does he
17. The children can read English, ?
A. can’t they B. can they C. they can D. they can’t
18. Overcrowded places have a lot of problems, ?
A. doesn’t it B. have they C. don’t they D. does they
19. The immigrants will hardly find accommodation in the city, ?
A. will it B. won’t it C. will they D. won’t they
20. Disease spreads more quickly in overcrowded areas, ?
A. doesn’t it B. is it C. isn’t it D. does it
21. The Segway, which is a vehicle, will be a success.
A. two-wheels B. two wheels C. Two wheel D. two-wheeled

Answers

Answer:

5)A

6)C

7)B

8)C

9)C

10)C

11)B

12)B

13)D

14)B

15)B

16)B

17)A

18)C

19)D

20)A

21)D

My mother lives around me Far awayr

Answers

Answer:

My mother around me lives far away.

What resources are used to write an essay?

Answers

A topic, evidence (e.g. quotes, scenes), pen, paper.

------------------------------------------------------------------------------------

Answer:

Idea, Main point, supporting evidence (to suport your topic)

Which sentences in this excerpt from Ernest Hemingway's "In Another Country" reflect the theme of the psychological alienation caused by war?
We all had the same medals, except the boy with the black silk bandage across his face, and he had not been at the front long enough to get any
medals. The tall boy with a very pale face who was to be a lawyer had been lieutenant of Arditi carefully selected volunteers specializing in
dangerous campaigns and had three medals of the sort we each had only one of. He had lived a very long time with death and was a little
detached. We were all a little detached, and there was nothing that held us together except that we met every afternoon at the hospital.
Although, as we walked to the Cova through the tough part of town, walking in the dark, with light and singing coming out of the wine-shops,
and sometimes having to walk into the street when the men and women would crowd together on the sidewalk so that we would have had to
jostle them to get by, we felt held together by there being something that had happened that they, the people who disliked us, did not
understand.

Answers

Answer:

He had lived a very long time with death and was a little

detached. We were all a little detached, and there was nothing that held us together except that we met every afternoon at the hospital

We felt held together by there being something that had happened that they, the people who disliked us, did not understand

Explanation:

The first sentence describes how the war affected the men psychologically as they had all stayed with death for too long and were detached, in a way from their immediate surrounding with the only thing holding them together being the visits to the hospital.

The second sentence that reflect the theme of psychological alienation caused by war was the statement about being held together and not being understood by the people who disliked them.

Câu 2:
Indicate the word that differs from the other three in the position of stress: customer, festival, suggestion, capital

A. customerB. festivalC. suggestionD. capital

Answers

Answer:

suggestion

Explanation:

customer : stress 'customer

festival : stress 'festival

suggestion : stress su'ggestion

capital : stress 'capital

The word "reparation" means? ​

Answers

Answer:

the action of making amends for a wrong one has done, by providing payment or other assistance to those who have been wronged.

Answer:

the making of amends for a wrong one has done, by paying money to or otherwise helping those who have been wronged

please HELP ne with these questions answer them correctly​

Answers

1. top = topped
2. has = have
3. is = are
4. protects = protect
5. help = helps

When summarizing the ________ of a plot, one should notice the key ideas about how the conflict builds. A. Beginning B. Middle C. Resolution D. Ending

Answers

Answer: When summarizing the beginning of a plot, one should notice the key ideas about how the conflict builds.

Your answer is A, Beginning.

Hope this helps!

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