1. mole fraction

A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 241 torr. Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature. What is the mole fraction of

3. Physics

At one point in a pipeline, the water's speed is 3.00 and the gauge pressure is 4.00×104 . Find the gauge pressure at a second point in the line 11.0 lower than the first if the pipe diameter at the second point is twice that at the first. I've been

4. physical chemistry

How many grams of NaC2H3O2 (M = 82.034 g mol-1) should be dissolved in 400.0 g of water to prepare a solution which is 11.28 % NaC2H3O2 by mass?

5. Earth Science

Tomorrow will be sunny with high clouds. What does this statement describe?

6. math

a point has coordinates (-3,0) where is it located in the coordinates plane? A. x-axis b. y-axis c. quadrant2 d. quadrant3 i think it y-axis

7. chemistry

What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.5*10^{15}Hz?

8. Molality

An aqueous solution contains 8.7% NaCl by mass. 1. Calculate the molality of the solution. 2. Calculate the mole fraction of the solution.

9. Chemistry

Copper metal reacts with dilute nitric acid in the absence of air. Which products are present? 1. copper (II) nitrate, nitrogen monoxide, and hydrogen gas 2. copper (I) nitrate, water and hydrogen gas 3. copper (II) nitrate, nitrogen monoxide and water 4.

10. physics 2

1) A spherical surface completely surrounds a collection of charges. Find the electric flux through the surface if the collection consists of a single +3.93E-6 C charge. 2) A plate carries a charge of -2.52μC, while a rod carries a charge of +2.19μC. How

11. causal

which relationship can best described as causal? (1)height and intelligence (2)shoe size and running speed (3)number of correct answers on a test and test score (4)number of students in a class and number of students with brown hair

12. equal group riddles

i am a number between 20 and 30.when you put me into 6 equal groups;there is an even number in each group and 1 is left over.what number am i

13. physics

DRWLS: PLEASE SEE ADDITIONAL INFO AT THE BOTTOM its the second part of the question that I don't understand: according the graph shown, the net force acting on an object varies wth the object's displacement. Calculate the work down by the force on the

14. math

What is the shortest length of television cable that could be cut into either a whole number of 18-ft pieces or a whole number of 30-ft pieces?

15. Biology

27. Which of the following is true for both aerobic and anaerobic respiration? a. ATP is produced during glycolysis b. Pyruvate is broken down to ethanol or lactate c. The electron transport chain pumps hydrogen ions across a membrane d. An organic

16. chemistry

how many grams of NAOH are needed to make a 2.00 molal solution? I got stuck here 2.00 molal=2.00 mole/kg molecular weight of NAOH= 40g/mol (2.00 g/molecular weight x kg) x 40 g/mol= stuck thanks jim

17. algebra

Joe's larger tank is completely filled with water. He takes water from it to completely fill the small tank. Determine how many cubic inches of water will remain in the larger tank The larger tank is 12 x 30 x 16 and the smaller tank is 6 x 12 x 9.

18. Math

suppose that a given quadrilateral is a kite with no right angles. which of the following is possible A: the quadrilateral is a rhombus B: the quadrilateral has congruent diagnols C: the quadrilateral is a trapezoid D: None

19. College English 101

On these we had to say if the sentence is Prepositional phrase, Participial, Gerund phrase, Infinitive phrase, or Appositive phrase. 1. Losing weight gradually gives the body time to adjust. I can not figure out if it is an Infinitive phrase, or

20. physics

A man drags a sack of flour of mass 50 kg at constant speed up an inclined plan to a height of 5m. The plane makes an angle of 30„awith the horizontal and a constant frictional force of 200 N acts on the sack down the plane. 1- How much work does the man

21. Math

Solve for the indicated variable: A = 2(pi)r^2 + 2(pi)rh, for positive r (and by pi i mean 3.14...) This is what I have so far: A = 2pi(r^2+rh) A/2pi=r^2 + rh ? Thanks!

22. PHYSICS

the diagram shows a skateboarder starting a run from Position P (2.5m) at 2.6 m/s. The mass of the skateboarder system (boarde + board) = 74.5kg. Assume that frictional forces can be ignored. a)calculate the speed of the skateboarder at position a(1.5 m)

23. physics - Damon

PLEASE SEE ADDITIONAL QUESTION AT BOTTOM. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined

24. math

a point has coordinates (0,3) where is it located in the coordinates plane? A)x-axis B)y-axis C)quadrant3 D)quadrant4 i think it is quadrant3

25. Chemistry

In most of its compounds, this element exists as a monatomic cation. 1. Br 2. N 3. Na 4. Cl 5. O Is it 3. Na ?

26. HELP PLZ

The indo-european parent language was first spoken by a pre-historic people in: A}western europe B}Middle east C}Northern india D}Southastern europe .i choose d.

27. Chemistry

Which of the following surfaces does a true monolayer always form on? A. silicon B. gold C. both D. neither Why are silicon surfaces studied in this experiment? A. Silicon is shiny like the windows in tall buildings. B. Silicon more closely represents

28. Public Speaking

Critique my response The Question: We can listen at a rate at least three times faster than that rate that we can speak. What impact does this have on communication? Response: Ones should take the head-nodders and the note-takers as signs that the audience

29. Chemistry

Balance the following chemical equation. __Fe(OH)2 (s) + __H3PO4 (aq) -> __Fe3(PO4)2 (s) + __ H2O (l) Would it be 3 Fe(OH)2 (s) + 2 H3PO4 (aq) -> 1 Fe3(PO4)2 (s) + 6 H2O (l) ?

30. Chemistry

These ionization energies (Kj/mol) have been reported for element "Z": first: 500 second: 4560 third: 6910 fourth: 9540 fifth: 13400 Which of the following elements is most likely "Z"? 1. Si 2. Mg 3. Al 4. Na 5. Cl Is it 4. Na ?

31. Biology--Urgent

27. Which of the following is true for both aerobic and anaerobic respiration? a. ATP is produced during glycolysis b. Pyruvate is broken down to ethanol or lactate c. The electron transport chain pumps hydrogen ions across a membrane d. An organic

32. physics

A baseball is thrown with an initial velocity of magnitude v at an angle of 27.2 with respect to the horizontal (x) direction. At the same time, a second ball is thrown with the same initial speed at a different angle with respect to x. If the two balls

33. hrm 240

i did the first one and cant find the second anywhere please help thanks what does primary strategic consideration mean? Draft and post a memo to upper management detailing the benefits available to employees in the position focused on in your final

34. Finance

Bunyan Lumber, LLC, harvests timber and delivers logs to timber mills for sale. The company was founded 70 years ago by Pete Bunyan. The current CEO is Paula Bunyan, the granddaughter of the founder. The company is currently evaluating a 5,000 acre forest

35. PHYSICS

A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined on an electronic scale and its diamter was

36. physics

A string is tied across the opening of a deep well, at a height 5 m above the water level. The string has length 7.51m and linear density 4.17 g/m; any time there is a wind, the string vibrates like mad. The speed of sound in air is 343 m/s. Assuming that

37. Chemistry

Which of the following is a reactive gas? 1. Cl 2. Na 3. Au 4. Ra 5. Rn Is it 1. Cl?

38. spanish 2

I need help with making an comic strip with 10 verbs in sentences that are in past tense. Any ideas how to start it??

39. physics - BOB

PLEASE SEE ADDITIONAL QUESTION AT BOTTOM. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined

40. Algebra

Arianna is 25 years older tha Emma. In 15 years, Arianna will be twice as old as Emma. What will their ages be in 15 years?

41. The Scarlet Letter

what does Hester mean when she asks Dimmesdale, "Wilt thou die for very weakness"? is she just asking him if he's willing to give up his life because of his weakness? what is his weakness, chillingworth?? Please help

a 15g bullet is fired at 840 m/s into a penullum consisting of a 24kg bag of sand. If the bag rises to a height of 80cm, how much energy is converted into thermal energy in the bag? Emechanical=Ek + Eg =1/2mv^2 +mgh =1/5(0.015)(840) + 0 =5292J Emechanical

43. finance

Given the following table: Type of Security Interest Rate 5-Year Treasury Note 5% 5-Year Corporate Bond (High quality) 6% 5-Year Corporate Bond (Low quality) 8% Calculate the default risk premium (DRP) on the Corporate bonds.

44. Materials - Chemistry

Distinguish between the two main types of interstitial sites in metallic crystal lattices. Discuss the importance and potential uses of these sites. Can someone please tell me what are the two types? Thanks!

45. hrm 240

please someone help im clueless and i hace no idea what to do just a little hint or help too get me started would be greatly appreciated. i got the first question but need help on 2nd and 3rd my position im focising on is a RN! Draft and post a memo to

46. help plz

cognate languages are those languages which: A}Derive from a single parent language. B}Borrow words from each other C}Use the same alphabet D}Are spoken in the same country .The answer i choose is B.

47. English

Can you check these 6 paragraphs, please? 1) During my Christmas holidays I helped my mum dress the Christmas tree and wrap up the last Christmas presents. 2) I suggested her what she should give my father as a Christmas present. 3) I went shopping for

48. College English 101

In the following sentence I have to put either (Direct Object, Indirect Object, Objective Complement, Predicate Noun, or Predicate Adjective) for the underlined word. 1. In spite of what I know, I consider all snakes dangerous. (dangerous) is the word to

49. biology

what animals and plants are unique in the Belize's barrier reef system? would it be; blue green algae, mangroves and large seagrass meadows.marine turtles, manatees and marine crocodiles? I also need to find the animals and plants that are diversity in

What process and outcome evaluation could be used to display the effectiveness and efficiency of the following program? At the Greenby Community Mental Health Center, the Consultation and Education Department was about to go under. Although consultation

52. PHYSICS

PARTS C AND D ARE WHAT I'M HAVING TROUBLE WITH. a tobaggan of mass 20kg is dragged horizontally across snow by someone who exerts a force of 45N. the tobaggan travels 8m under the action of the force and has a final speed of 2.6 m/s. a)calculate the actual

53. math

i need help with this problem x AND y ARE THE SAME IN BOTH PROBLEM???? 7x+8y=25 9x+10Y=35

54. Biology

10. Most of the time, genetic characters are inherited by more complex patterns of heredity including all of the following EXCEPT a. solitary alleles b. incomplete dominance c. codominance d. polygenic inheritance A? 11. Both sickle-cell anemia and

55. Help plz

The first indo-language to arrive on the british isles was: A} Italic B} Balto-Slavic C}Celtic D}Gothic .I choose c.

56. science

what is the process that plants use to make food

57. maths

I've to solve the following absolute value equation: |x - 3| - 4 = 0. I found one of the answers which is 7 i.e. |x - 3| - 4 = 0 x - 7 = 0 x = 7 However, my textbook also includes -1 as the answer. How did they get this answer?

58. Social studies

I am doing a report, but I don't know the captal of Texas.Can you help?

59. Physics

The intensity level of a sound is reported in unit decibel(dB). how does IL change if we increase a sound intensity by a factor of 10? a)remains the same b) increases by 1dB to 2dB c)it increases by 2dB to 20dB d)it increases by 20dB to 200dB e) it

60. Managerial Accounting

The company reported a 6% operating margin on sales, a 12% pretax operating return on total assets, and \$500 million of average total assets. I have calculated the operating income to \$60,000,000. How do I calculate the total sales and total asset turn

61. Chemistry

Given an aqueous solution of NaCl, which of the following is the simplest method for the separation of NaCl from the solution? 1. evaporation of solution to dryness 2. filtration of solution 3. osmosis of solution 4.centrifuging the solution 5.

62. Math

Solve for the indicated variable: (x/a)+(y/b)+(z/c) = 1, for c This is what I have so far: z/c = 1-(x/a)-(y/b) z/c = 1-[(xb-ay)/ab] z/c=(ab/ab)-[(xb-ay)/ab] z/c=(ab-xb-ay)/ab ...I'm not sure if it's right so far, and if it is, i don't know where to go

63. physics - Damon

PLEASE SEE ADDITIONAL QUESTION AT BOTTOM. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined

64. Math

In the number 0.3645, which of the following does the digit 4 represent? Explain why.

65. Technology

Short answer question #23. Briefly explain the four stages of making an expendable mold casting. My answer: There are four stages in making an expendable mold casting. The first is making the pattern. In the second step, the pattern is surrounded with sand

66. maths

I've to solve the following absolute value equation 8|w-7|=72. I solved the equation and the answers I got were -2 and 16. However the problem is that when I'm checking the equation with the answers it's not coming right. I.E. 8|16-7|=72 8|9| = 72 8(9)= 72

67. Biology

27. Which of the following is true for both aerobic and anaerobic respiration? a. ATP is produced during glycolysis b. Pyruvate is broken down to ethanol or lactate c. The electron transport chain pumps hydrogen ions across a membrane d. An organic

68. hrm 240

i need help with this i have to have a 700-1000 word memo datailing the benefits availible to employees in the position focused on in my final project. that position is a animal rescuer. please help thanks

69. communication

within the workplace.......let's try to apply the health belief model to that environment......when you have a mix of cultures and socioeconomic status and perspectives.......how difficult is it to get folks to 'move' together? How much should each person

70. art

thanks bob but with out words i am more lost than before. what are the photos showing me?

71. geography

i need help with in economis activity the Question is: how are good and services distributed in theme parks? PLZ REPLY ASAP

72. biology

How do autosomes differ from sex chromosomes?

73. help

What is the percentage of words in an english dictionary that have latin or greek as their source? A} 50% B} 60% C} 70% D} 80% .i choose a.

74. Edit plz!!!

can u edit this plz!!!:D --> In order to gain knowledge and prove your statement/point, you will have to do research. Research can be described in many ways such as through friends/family, and through experience and observation. To research , you must

75. psychology

What are the factors that influence persuasion?

76. College English 101

In the following sentence I have to put either (Direct Object, Indirect Object, Objective Complement, Predicate Noun, or Predicate Adjective) for the underlined word. I had 15 of these to do, and I think I understand them, but would like some reassurance.

77. English

Can you check the word choice in the following sentences? 1. We never did make to the stadium that day. 2. When the dog was jumping back on his pillow, he dragged the laptop with him. The laptop fell into the dustbin, which overturned spilling everything

its the second part of the question that I don't understand: according the graph shown, the net force acting on an object varies wth the object's displacement. Calculate the work down by the force on the object at the various displacements listed below (i

Hi!!! Im Sophie and like most people I am having trouble writing a Comparitive Essay for my Honors Project, so i need your help. I am compaaring the two books, Red Scarf Girl and Falling Leaves. But i am having SO much trouble finding a topic sentence!!!

80. Algebra

Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 40 miles per hour and train B is traveling at 60 miles per hour. Train A passes a station at 5:25 A.M. If train B passes the same station at 5:37 A.M, at what

Explain the acceleration of falling objects.

82. mgt 330

Do you believe that when times are tougher, leaders and managers become more emotionally intelligent?

83. English

Can you check these very last sentence of the day, please? 1) One day (and not once)the thieves jumped through the window of my house 2) One day the thieves got into my house through my bedroom's window. Actually, I had left it open through negligence. 3)

84. Social Studies

How support a policy of tolerance toward all culture in the classroom?

Find the value of x so that the mean of {5x, 3/2x, x+9, -x} is -1. a. 2 b. 1/2 c. -1/2 d. -2 My answer is d. Is it correct.

86. design/art

what is the principle of elaboration in design? i have seen it listed with variety and contast.

87. English

Can you check the mistakes in the following paragraph please? One day, at primary school, a stressed and bored nine-year-old girl didn’t know what to do as she found school lessons really uninteresting. So she decided to do something amazing to surprise

88. English

I forgot these other two sentences for you to check. 1) Her younger son did a one-week skiing course for beginners. 2) He also took private skiing (ski) lessons in the afternoon for a week 3) THe ski instructor taught him how to snowplough without ski

89. communication

When someone weighs their response to a health issue that they are confronting, knowing that they need to go to one healthcare facility or another for treatment, or, one physician or another for care...........what impact does reputation and word of mouth

90. Chemistry

Sulfur Trioxide can be dissolved to form sulphuric acid. But it is avoided since the reaction is violent. Explain why?

91. Algebra

The perimiter of a rectangle is 220 inches. The length exceeds the width by 68 inches. Find the length and the width.

92. science

RFLP analysis of some blood from a crime scene shows that the blood belongs to someone with genotype D1/D3, E2/E5, F5/F5, G1/G3. the frequencies of these genotypes in the Caucasian population are D1/D3 =0.01, E2/E5= 0.02, F5/F5= 0.001, G1/G3= 0.00001. What

93. Chemistry

Which of the following groups has the species listed correctly in order of increasing radius? 1. Mg +2, Ca +2, Ba +2 2. Fe, Fe +2, Fe +3 3. Na, Mg, Al 4. Br-, Cl-, F- 5. K+, Na+, Li+ Is it 1. Mg +2, Ca +2, Ba +2 ?

94. Chemistry

Which is/are not soluble in water? (I) NaOH (II) BaCO3 (III) AgCl (IV) (NH4)3PO4 (V) FeCl2 1. (I) only 2. (III) only 3. (V) only 4. (II) and (III) 5. (II) and (V) Is it 2. (III) only?

95. research

What benefits do people gain from knowledge of researching and proper application?

96. early chilhood

an early childhood proffesional who works toward a young child's socialization into the larger cociety recognizes the seriousness of:

97. probability maths

Jim rolls a dice twice. The dice is biased so the probability of getting a six is one quarter. WHat is the probability that he gets two sixes

98. College English 101

Ok one more. In the following sentence I have to put either (Direct Object, Indirect Object, Objective Complement, Predicate Noun, or Predicate Adjective) for the underlined word. 1. Bryan thought Twain's novel splendid. (splendid) is the word needing

99. Antarctica

information and diagrams of a scientific research centre

100. preschool

i have son that 2 year and still not talking .what should i do ?

101. HISTORY

Why was the Great Depression called the great leveler?

102. Chemistry

Which of the following is an unreactive metal? 1. Na 2. Au 3. Rn 4. Ra 5. Cl Is it 2. Au?

103. 6th Grade Science : Newtons First Law of Motion

Explain the idea of streamlining, as it applies to a skydiver.

104. biology

biological interrelationship among life forms; means hoe animals or plants depend on one another? where can I find the information on this topic on Belize's barrier reef system

105. early childhood

early childhood professionals know that the beginning step in assisting non-mainstream children to develop literate style oral language is to:

106. early chilhood

a classroom activity that requires children to find their name cards at cirle time or on the daily duties chart affords an opportunity for:

107. science

RFLP analysis of some blood from a crime scene shows that the blood belongs to someone with genotype D1/D3, E2/E5, F5/F5, G1/G3. the frequencies of these genotypes in the Caucasian population are D1/D3 =0.01, E2/E5= 0.02, F5/F5= 0.001, G1/G3= 0.00001. What

108. math

Consider the right circular cone shown. If the radius of the circular base remains the same and the height varies, what are the minimum surface area and minimum volume the cone can have?

109. algebra

What are the roots of the equation x[2]-7x+6=0?

110. english

for the run on sentence Our children always play together at either of our houses, or at the park where there is alot for the energetic kids can loose some of their energy. where do i replace "a place where the" kids lose energy?

111. biology

How do autosomes differ from sex chromosomes?

Make sure to identify: • Your expectation of use of research by you in the workplace (ie: user, researcher, contributor) May i knoe what this quesiton is asking!!! thnx

113. English*

can u edit this plz!!!:D --> In order to gain knowledge and prove your statement/point, you will have to do research. Research can be described in many ways such as through friends/family, and through experience and observation. To research , you must

114. Math

If qrs / r = s and the value of q is 0, which of the following must be true? Explain why. a) r = 0 b) s = 0 c) s / r = 1 d) qr / r = 1 e) s = 2r

115. math

Consider the right circular cone shown. If the radius of the circular base remains the same and the height varies, what are the minimum surface area and minimum volume the cone can have?

116. management

How does the local, state, or national economy affect (hospital) your business or place of work?

117. question

least three reasons why workers might be more satisfied with their jobs than in the past. least one reason why you think workers may be more motivated by job security rather than salary and benefits in difficult economic times?

118. communication

in testing for unanticipated events, what are the key take-away's for a facility or business? What should everyone walk away with, and what should be done with that information?

119. Financing

Does anyone know a popular Food Trading Company?

120. geometry

find the number of degrees in the point angle of each figure { 5/2}

121. spelling

Hi. I am a finalist for a spelling bee competition but I want to understand something: Why do most spellers need to know the root of the word. I want to know so that if it is usfull I can use it as well. Thank You In Advance!

122. Health

What kind of speaker notes would you put on a power-point for a critical nurse?

123. english

Write a short analysis of the use of researching in your future industry ¡V how do they gather or use research ie: types of projects, proposals, etc¡K „³There are no souls who never do research, because without research they can¡¦t gain knowledge.

124. English

I have to do a report on a poet, John Grey. He is Australian and i cannot seem to find him anywhere on the internet! Is it possible that it may be John Gray? I am very confused and need some help on this assignment! Thank you.

125. early childhood

use of cohesive devices reflects a speaker's ability to:

126. child literacy development and professional develo

exemplifies the skill of evencasting?

127. ETH-125 UofP

Same question. What other methods of measurment do sociologists use to calculate prejudice?