Heyy, I have a quick question. I am doing binary systems, and I have a water/propanol system, and it says " 0.433 mole fraction propanol (71.7% propanol by weight)" does this mean that the mole fraction of water is 0.433

58,761 results
  1. Science

    Which of the following body systems work together to get cells the nutrients they need to carry out cellular respiration? A. the digestive and respiratory systems B. the respiratory and circulatory systems*** C. the digestive and circulatory systems D. the

  2. Science test

    Can someone please help me with science test answers!! Why do scientists use models of natural systems? A- Scientist use models of natural systems because these systems are often too large or too small or too complex to study directly B-Scientists use

  3. Science

    which of the following can help astronomers detect if a star is part of a binary star system A. the star varies temperatures near the binary star B. the star wobbles near the binary star C. the star has very strong gravity D. the star belongs to an open

  4. Science

    Why is binary fission in Paramecium considered as asexual reproduction? A) Binary fission produces identical daughter cells. B) Binary fission produces non-identical daughter cells. C) Binary fission produces more than two daughter cells. D) Binary fission

  5. Chemistry

    The vapor pressures of ethanol (C2H5OH) and 1-propanol (C3H7OH) are 100 mmHg and 37.6 mmHg, respectively. Assume ideal behavior and calculate the partial pressures of ethanol and 1-propanol at 35 degrees Celsius over a solution of ethanol in 1-propanol, in

  6. chemistry 106

    Methanol, ethanol, and n-propanol are three common alcohols. When 1.00 g of each of these alcohols is burned in air, heat is liberated. Calculate the heats of combustion of these alcohols in kJ/mol. (a) methanol (CH3OH), -22.6 kJ (b) ethanol (C2H5OH),

  7. chem

    name the following compounds and tell what type of compound they are (binary ionic. ternary ionic, or binary molecular) a)FeBr3 b)CBr4 c)Na2Cr2O7

  8. chemistry 1B

    1-propanol (P1° = 20.9 Torr at 25 °C) and 2-propanol (P2° = 45.2 Torr at 25 °C) form ideal solutions in all proportions. Let x1 and x2 represent the mole fractions of 1-propanol and 2-propanol in a liquid mixture, respectively, and y1 and y2 represent

  9. Chemistry

    The heat of combustion of 2-propanol at 298.15 , determined in a bomb calorimeter, is -33.41. (a) For the combustion of one mole of 2-propanol, determine delta U (b) For the combustion of one mole of 2-propanol, determine delta H

  10. Biology

    Which organ systems help deliver oxygen to body cells? I think that its the enodcrine and lymphatic systems the other choices are A.respitory and excratory B.muscular and immune systems C.respiratory and circulatory systems

  11. math 12

    How many different binary numbers can be present by a string of binary code with 5 digits if the first digit is 1 and the last two digits are 0?

  12. chemysteryyy!!!!

    Rubbing Alchol often contains propanol, C3H7OH. Suppose that you have an 85.9g sample of propanol. a) Howmany carbon atoms are in the sample? b) Howmany hydrogen atoms are in the sample? C)Howmany oxygen atoms are in the sample? PLEASE!! explain the steps

  13. chemistry

    If you place 10.0 L of propanol (C3H8O) in a sealed room that is 3 m long, 2.75 m wide, and 2.5 m high, will all the propanol evaporate? If some liquid remains, how much will there be? The vapor pressure of propanol is 10.7 torr at 25 °C, and the density

  14. Chemistry

    How many moles of propane are expected from the complete reaction of 82.8 g of propene? How many grams of propane are expected from the complete reaction of 101 g of propene? Kyle-- Here is a problem I worked last night for Kira (about half way down the

  15. chemistry

    I have 3 questions that I am uncertain about. 1) what determines the order in which the coumponent elements of binary molecular compounds are written? 2) Name the Binary compound according to the prefix system for As2O5 3) write the formula for each of the

  16. math

    Find the binary equivalent of x^8+x^3+x+1 x^1000 + x^11 + x + 1 I just converted the decimal-format exponents to binary format (0's and 1's times powers of 2). The reason you did not get a reply so far is that most of the tutors have probably never heard

  17. Language Arts

    Quick question. Is Two Kinds by Amy Tan, fiction or nonfiction? This is not a question on a quiz or a quick check. I cannot find any sources online that tell me whether or not it is fiction or nonfiction.

  18. chemistry

    What is the composition of a methanol () – propanol () solution that has a vapor pressure of 121 torr at 40°C? At 40°C, the vapor pressures of pure methanol and pure propanol are 303 and 44.6 torr, respectively. Assume the solution is ideal. Mole

  19. Organic Chem I Lab

    I had to react 1-propanol with NaBr and H2SO4. I refluxed for one hour and when attempting to separate out the product (product was supposed to be 1-bromopropane) via sep funnel either could no longer distinguish between the organis layer and the aqueous

  20. programming 2

    Write a program that inputs a word representing a binary number (0s and 1s). First, your program should verify that it is indeed a binary number, that is, the number contains only 0s and 1s. if that is not the case, your program should print a message that

  21. chem

    I am still having a little problem with my original question. However, this is what I have done so far. I am not sure what to do with the density of the solution of 0.78 g/mL. The answer I came up with is 5.47 mol/kg. I found the density of the water in

  22. Chemistry

    Heyy Jiskha!! I need ur help today:) Hope you will help:D My question is that why is supersaturation unstable... I read the explanations for this on many websites but for some odd reason I just cannot get it to sink in my mind. What does it mean by it is

  23. Chemistry

    I did a lab and got a bunch of questions about the lab. Here is what my lab was about: Properties of alcohols: First, I wrapped the bulb of a thermometer with a tissue secured with a wire. Then I squeeze enough methanol onto the tissue to completely

  24. chemistry

    Lead pipes were once used to transport drinking water and are still found in some older homes and city water systems. Suppose the lead concentration and pH of the water determined by lead (II) hydroxide (Ksp = 2.8x10^-16) dissolving to produce a saturated

  25. science

    Hi. I know this is an opinion question, but can someone please explain the situation to me because I don't totally understand the question. Thanks. 3.Water distribution systems are natural monopolies, since it is impractical to have numerous, competing

  26. chemistry

    What is molarity of propanol, C3H7OH, when 60. mL propanol is mixed with enough H2O to make a final volume of 100. mL? The MW of propanol = 60.11 g/mol and the density of propanol = 0.804 g/mL.

  27. chemistry

    The vapor pressures of several solutions of water-propanol(Ch3Ch2Ch2OH) were determined at various compositions, with thefollowing data collected at 45C: XH2O Vapor pressure (torr) 0 74.0 .15 77.3 .37 80.2 .54 81.6 .69 80.6 .83 78.2 1.00 71.9 a.) Are

  28. Advanced Chemistry

    he vapor pressures of several solutions of water-propanol(Ch3Ch2Ch2OH) were determined at various compositions, with thefollowing data collected at 45C: XH2O Vapor pressure (torr) 0 74.0 .15 77.3 .37 80.2 .54 81.6 .69 80.6 .83 78.2 1.00 71.9 a.) Are

  29. chemistry

    I have to prepare a 0.2% water solution of n-propanol and a water solution of methanol and isopropanol at 0.2% that can be in the same container. It didn't specify but I'm pretty sure the solutions are v/v%. For the n-propanol a 0.2% solution should just

  30. Organic chemistry!!!Need helpp!!!

    1. Consider the effect of water concentration on rate of the reaction in water and acetone. WOuld you predict that the rate would be greater or less in the presence of a higher concentration of water? Explain your answer, using the structure of the

  31. Organic chemistry!!!Need helpp!!!

    1. Consider the effect of water concentration on rate of the reaction in water and acetone. WOuld you predict that the rate would be greater or less in the presence of a higher concentration of water? Explain your answer, using the structure of the

  32. Science

    _______ belief systems play an important role in making decisions about human behavior and concerns please help Ãnd quick This is a very open-ended statement in my opinion. The most natural response to me seems like religious belief systems, but

  33. chemistry

    name the following compounds and tell what type of compound they are (binary ionic. ternary ionic, or binary molecular) a)FeBr3 b)CBr4 c)Na2Cr2O7 still haven't gotten help yet and i posted a response to the question below

  34. Chemistry

    If you place 10.0 L of propanol (C3H8O) in a sealed room that is 7.5 m long, 3 m wide, and 3 m high, will all the propanol evaporate? If some liquid remains, how much will there be? The vapor pressure of propanol is 10.7 torr at 25 °C, and the density of

  35. engl1301

    Finishing quickly/quick/as quick/so quick … is not as important as answering all the question correctly. which word would be correct here?quickly bc of parallel sentence,correctly.,thanks.

  36. Math

    How do we convert 1111010.11(binary) to decimal by first representing it in BCD form and then converting it to decimal An example given in the note has divided the integer part of the given binary number by 1010 successively and multiplied the fractional

  37. Biology

    in terms of biodiversity and its conservation , how do systems function as dynamic systems?? I don't really get the question nor know how to approach it

  38. chem

    Propanol, CH3CH2CH2OH, has a molar mass of 60.1 g/mol and a boiling point of 97.4oC. Use intermolecular forces to explain why propanol has a higher boiling point than butane or acetone.

  39. chemistry

    I need to find out which structure is more correct: Reaction of the compound C3H8O with CrO3 (oxidizing agent) yields acetone. Which of the three structures is more correct? (My three structures are as follows: 1-propanol, 2-propanol, and methylethyl

  40. Chemistry

    Someone please help me on this question! Ethanoic acid and 1-propanol are mixed with H2SO4 and heated. Write the balanced equation.

  41. Organic Chemistry

    Water/methanol and water/acetone are viable solvent systems for recrystallization,but water/chloroform and water/pentane are not. Briefly explain in 1-2 sentences.

  42. physics

    A 5 meter diameter telescope is used to observe binary star systems. What is the minimum separation distance (perpendicular to the line of sight) for which the two stars can be resolved if they are at a distance of 1,000 light years = 10 m and they are

  43. Chemistry- Organic Reactions

    Can anyone help me with this question: I have to show how I would synthesize the molecules: hexanol, bromo-2-pentene, and ethoxypropane by using the starting matierials: -benzene -bromocyclopropane -butanoic acid -chlorine gas -cyclohexane -ethanol

  44. Inorganic

    Heyy, I have a quick question. I am doing binary systems, and I have a water/propanol system, and it says " 0.433 mole fraction propanol (71.7% propanol by weight)" does this mean that the mole fraction of water is 0.433 or propanol? Cause if propanol is

  45. chemistry

    In an experiment, ethanol standards and an n-propanol standard were to be prepared in water. The ethanol standards were weight% and the n-propanol could be either v/v or weight%. One of the questions for the report asks why it was ok to make the n-propanol

  46. Chemistry - Please help!!

    I did a lab for Organic Chemistry We did a simple distillation of an unknown alcohol to determine the boiling point, which was found to be 74*C The four possibilities for the unknown were methanol, ethanol, 1-propanol and 2-propanol. So from the boiling

  47. Chemistry

    I did a lab for Organic Chemistry We did a simple distillation of an unknown alcohol to determine the boiling point, which was found to be 74*C The four possibilities for the unknown were methanol, ethanol, 1-propanol and 2-propanol. So from the boiling

  48. Organic Chem

    Why is propanol ammonia a better separator of red leaf extract in thin layer chromatography that propanol water?

  49. Geo

    Just a quick question that will help me in my essay. I just need a quick answer not an explination, Im just using this answer as a quick refernce. Question: What is the most common precipitation in New Brunswick. I just need a quick answer. Rain When I say

  50. Chemistry II

    When a specific amount of propanol (C3H8O) is added to 110.0 g of pure water at 60°C, the vapor pressure of water over the solution is lowered by 1.596 kPa. Given the vapor pressure of water at 60°C is 19.932 kPa, what is the mass of propanol added?

  51. chemisry

    Q2. Distinguish between the following- 1. CH3OH and C2H5OH 2. Phenol and methanol 3. 1-Propanol and 2-Methyl-2-propanol 4. Ethenol and 1-propanol 5. Propanol and propanone 6. Acetaldehyde and benzaldehyde 7. Benzaldehyde and benzoic acid 8. Propanoyl

  52. chemistry

    if u place 10 L of propanol (C3H8O)in a sealed room that is 7.5 m long , 3 m wide and 3 m high, will all the propanol eveporate?if some liquid remains, how much will there be?the vaopr pressure of propanol is 10.7 torr at 25 C, and the density if the

  53. China

    Hello, I have a quick question; It's not for any assignment, but just a little question. When did Ancient China start building the Great Wall, and when did it end? I just want a quick answer, no links. thx!

  54. math

    the binary system is used for computer programming. a binary number consists of a string of digits that are either 0s or 1s a. if a string of binary code is 5 digits long, how many binary numbers are possible if the first digit is a 1? b. how many

  55. Science: Astronomy

    Why have so few visual binary star systems been fully analyzed to reveal individual masses?

  56. computer or math

    pls help me to solve this question. thank you very much binary-decimal conversion a.101= b.1100= c.100110= d.111111= decimal binary conversion a.1216 10 b.2121 10

  57. english

    what is an interjection? Try www.dictionary.com what key would you use forlesson7-1 homework helper online I wish someone would answer my question the telling me to look it up!!!!!!!!!!! what question????????????????????? what question?????????????????????

  58. English

    Claire: As you all know, almost everything can be delivered in Seoul, and I love that! Even hamburgers can be delivered here. Fangjin: And the speed of delivery is unbelievable. Last night, I ordered fried chicken, and it was delivered in less than 30

  59. Math2

    A "quick picture" is an estimate than? 5 x 2.7 ..... 5 x 3= 15 Its been a long time since elementary school and I do not remember "quick picture" The question was How can you use a "quick picture" to find 5 x 2.7? the answer is 13.5.......an estimate would

  60. Science

    When 1.23g of ethanol (delta c Hm = -1368kj/mol at 25 C ) is burned in an adiabatic flame calorimeter, the temperature increases by 8.6 C. Under the same experimental conditions, when 1.14g of 1-propanol is burned, the temperature increases by 9.0 C. What

  61. chemistry

    In propanol, cholesterol is 2.7 times more soluble at 43°C than at 20°C. If a saturated propanol solution is prepared at 43°C , what proportion of the cholesterol will crystallize upon cooling to 20°C?

  62. chem

    The heat of combustion of 2-propanol at 298.15 {\rm K}, determined in a bomb calorimeter, is -33.41{\rm{kJ/g}}. (a)For the combustion of one mole of 2-propanol, determine \Delta U. (b)For the combustion of one mole of 2-propanol, determine\Delta H.

  63. Chemistry

    Quick question: How can I be sure that a slow reaction is not running out of reagents? Thanks The question is too general for a quick answer. Depending upon the reaction, intensity of color (either decreasing or increasing) might be one way, the odor of a

  64. organic chem

    Dehydrate the following a. 2-methyl-1-propanol b. 2-methylcyclohexanol c. 2-methyl-1-phenyl-1-propanol d. 1-methylcyclopentanol

  65. org. chem

    Draw the acetal obtanined from 1-propanol and benzaldehyde Draw the ketal obtained from 2-propanol and 3-methylcyclpentanone Can someone tell me where the actal/ketal comes from or do I just add it to the equation. Not sure how to start this. Thanks :)

  66. Chemistry

    Methanol ---> Normal BP: 64.6°C --> dHvap: 35.3kJ/mol iso-Propanol ---> Normal BP: 82.3°C --> dHvap: 45.4kJ/mol Cyclohexane ---> Normal BP: 80.7°C --> dHvap: 33.1kJ/mol Question: Ethanol has a normal BP of 78.3°C. Why is the normal BP higher than

  67. chemistry

    Hi i'm supposed to find a hydrocarbon with a molecular mas greater than 100g/mol, and i have no clue by using this properties what it is. Please help me:0 There must be a million hydrocarbons with a molar mass > 100. Knowing carbon is 12, C9 something

  68. Science

    How are the respiratory and circulatory and respiratory systems similar? A) Both systems provide glucose and other substances to cells. B) Both systems regulate blood flow throughout the body. C) Both systems help remove carbon dioxide from the body. D)

  69. English

    Quick! The house is on fire. Go out now! =================== In the short passage, what is the part of speech of 'quick'? Is it an adjective or an adverb? Does it mean 'Be quick!'?

  70. Math for liberal arts

    This question is dealing with hex, binary numbers. 1. 1012 x 100012 = I am assuming that this question is too. I hate math. 2. 7516 /2716 =

  71. computer science /use java language

    write the program that inputs a string representing a binary number(0s and 1s). First, your program should veerify that it is indeed a binary number, that is, the number contains only 0s and 1s . if that is not the case, your program should print a message

  72. English

    I ordered fried chicken, and it was delivered in less than 30 minutes. So quick! --------------- Does 'So quick!' mean #1? Then what does 'it' refer to? 1. It was so quick.

  73. Computer Science

    Convert the following binary numbers to decimal (6 points): 11111 101011 1101011 Convert the following decimal numbers to binary (6 points): 49 367 1023 Convert the following hex numbers to decimal (4 points): ACE 800 Convert the following decimal numbers

  74. Chemistry

    1.) How many grams of 2-propanol are expected from the complete reaction of 672 g of propene? 2.)How many moles of propane are expected from the complete reaction of 82.8 g of propene? 3.)How many grams of propane are expected from the complete reaction of

  75. Chemistry - Science

    A 6.70 g sample of a binary mixture of silver (I) nitrate and sodium nitrate is completely dissolved in water to make a solution. Aqueous barium chloride is then added to this solution in excess to form 3.60 g of silver chloride solid. What is the percent

  76. science(chemistry)

    I have a question about TLC plate solvents. What solvents will leave stains on a plate with a TLC plate out of the ones below and why?) (n-Octane, n-Hexane, Decane, Acetone, 1-Propanol, 2-Propanol, Ethanol, Toluene, Cyclohexane, Methanol, n-Heptane,

  77. Chemistry

    Quick question - I understand why ethanol is soluble in water, because it can form hydrogen bonds, but why is it also soluble in benzene, a nonpolar solvent?

  78. chemistry please help

    Which reaction could yield this compound as the major product? The product is propanal a. oxidation of propanoic acid, CH3CH2COOH b. oxidation of propanol, CH3CH2CH2OH c. reduction of propanol, CH3CH2CH2OH d. oxidation of 2-butanone, CH3CH2C(O)CH3

  79. chemistry

    name the following compounds and tell what type of compound they are (binary ionic, ternary ionic or binary molecular) FeBr3, b) CBr4 and c) Na2Cr2O7

  80. chemistry

    name the following compounds and tell what type of compound they are (binary ionic. ternary ionic, or binary molecular) a)FeBr3 b)CBr4 c)Na2Cr2O7

  81. Physics

    A 5 meter diameter telescope is used to observe binary star systems. What is the minimum separation distance (perpendicular to the line of sight) for which the two stars can be resolved if they are at a distance of 1,000 light years = 10 m and they are

  82. Chemistry

    Compare the water solubility and expected BP of propanol, propyl acetate, and acetic acid. Briefly explain why the difference are evident. Thanks!!

  83. Science-Weather

    Do the pressure systems in the Arctic move at the same speed as the pressure systems in the south? If so, why is this? I not sure about this question. I think there different, but i am not positive.

  84. computer science

    Which of the following is *not* a reason why a transmission signal might be corrupted or lost? 1. The protocol for the transmission is TCP/IP. 2. The cabling does not have any kind of shielding. 3. The copper used to connect the systems is contaminated. 4.

  85. Math

    This question is dealing with hexadecimals, binary numbers etc. G. 11112 + 10102 =

  86. Science

    So I have a question that I would like to have checked, and then I have a question that I need help with. Please understand I am not looking for answers or a link, I am looking for someone to help me understand what the question is asking and how to answer

  87. Chemistry

    Heyy, okay I have this question about chemistry and its driving me nuts. It feels like I am so close but am just missing something. The question is: A vessel of 6.84 L in volume contains 3.61 L of pure water at 25°C. A partial pressure of 3.67 atm of CO2

  88. CHEMISTRY

    Write equations for the solution process when ech of the following is dissolved in water. Potassium phosphate glucose Calcium chloride 1-propanol Butanone Ammonium sulfite

  89. maths x

    heyy xx how do i sbtract fractions from each other eg. 7/9 - 1/2 please help xx

  90. Intro to Chem

    How many grams of water, H2O, can be formed from the reaction of 8.9 grams of 2-propanol, C3H8O?

  91. chemistry

    predict the solubility of 2-propanol in dichloromethane and in water. Can someone explain how they came to their conclusion because I just don't understand how to determine solubility.

  92. Science

    (just a quick science question, pls correct my answer if im wrong..) Which of the following statements is true A.) there is more water on earth now than there was millions of years ago **** B.) there is less water on earth now than there was millions of

  93. Science

    How many milliliters of water at 20.0 °C are formed in the combustion of 25.0 g of a methanol–propanol mixture that is 62.5% methanol by mass? Assume there is an excess of oxygen available.

  94. Social Studies

    Heyy!! I have to do posters on A Lincoln any ideas?

  95. Chemistry

    Heyy, okay I have this question about chemistry and its driving me nuts. It feels like I am so close but am just missing something. The question is: A vessel of 6.84 L in volume contains 3.61 L of pure water at 25°C. A partial pressure of 3.67 atm of CO2

  96. math

    PUC raised money for the recent disaster victims.They decided to allocate the money in manner: 1/3 of the money goes for medical supplies, 1/4 of what was left brought tents,2/3 of the remaining went to water purification systems, the rest of the money was

  97. Math

    PUC raised money for the recent disaster victims.They decided to allocate the money in manner: 1/3 of the money goes for medical supplies, 1/4 of what was left brought tents,2/3 of the remaining went to water purification systems, the rest of the money was

  98. Science

    Hey people! So, uh, I'm trying to take an assessment in online school... long story short, I don't know what the heck I'm doing (like everyone else on here). So can you guys help me out? Here are some of the questions that stumped me: 1. Where can most

  99. organic chem

    which of following alcohols can be oxidized to be a carboxylic acid. Name the carboxylic acid produced. Those that cannot be oxidized to a carboxylic acid name the final product A. ethanol b. 2-propanol c. 1-propanol d. 3-pentanol

  100. chemistry

    What is the condensed formula for 1-butanol. I know the condensed formula methanol, ethanol, 1-propanol and 1-hexanol. methanol CH3OH ethanol CH3CH2OH 1-propanol CH3CH2CH2OH 1-hexanol CH3(CH2)5OH

Pages

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20