1. chemistry

    When boiled with concentrated aqueous alkali, fats and oils dissolve, but waxes do not. Explain the difference.
  2. Science

    Which foods are lipids found in, and what is their function in the body? A: lipids are found in sugars and starches and are the main source of energy for the body B: lipids are found in fats and oils and are an essential component of cell membranes C:
  3. Science

    Which foods are lipids found in, and what is their function in the body? A: lipids are found in sugars and starches and are the main source of energy for the body B: lipids are found in fats and oils and are an essential component of cell membranes C:
  4. health

    Is this the correct answer for this question: What do the various sections of the food pyramid stand for? I put Fruit group, Bread, cereal, rice, and pasta group, vegetable group, milk group, meat, poultry, fish, and beans, eggs, and nuts group, also,
  5. Chemistry

    Acetone is one of the most important solvents in organic chemistry, used to dissolve everything from fats and waxes to airplane glue and nail polish. At high temperature, it decomposes in a first order process to methane and ketene (CH2=C=O).At 600C, the
  6. Biology

    A. Proteins B. Carbohydrates C. Lipids D. Nucleic Acids Fatty Acids C Made of Amino Acids A Another name for sugars B Starches belong to these B Help build muscles A Immediate source of energy B Long term source of energy C Has the most calories per gram B
  7. Science Please helpppp me!!

    (1) in order for an organism to develop specialized tissues the organism must be which of the following A) A Plant B) An Animal C) Unicellular D) Multicellular*** (2) Which foods are lipids found in, and what is their function in the body? A) lipids are
  8. Social Studies

    Which foods are lipids found in, and what is their function in the body? A: lipids are found in sugars and starches and are the main source of energy for the body B: lipids are found in fats and oils and are an essential component of cell membranes C:
  9. science

    A 25mL solution of nitric acid was placed in a flask and a few drops of phenolphthalein were added. Dilute sodium hydroxide was added until the indicator changed colour. It was found that 28mL of the alkali was used. What colour was the solution in the
  10. chemistry

    A 25 mL solution of nitric acid was placed in a flask and a few drops of phenolphthalein were added. Dilute sodium hydroxide was added util the indicator changed colour. It was found that 28 mL of the alkali was used. (a) What colour was the solution in
  11. science (URGENT!! CORRECT PLEASE))

    (1) in order for an organism to develop specialized tissues the organism must be which of the following A) A Plant B) An Animal C) Unicellular D) Multicellular ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ My answer: D ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ (2) Which foods
  12. biology

    Suggest reasons why fats and oils are an efficient form of energy storage for living systems?
  13. p.e

    When consuming fats, the healthiest choice is foods high in A. Saturated fats B. Unsaturated fats C. Trans Fats D. Cholesterol My answer is B, am I correct? Thanks for the help.
  14. health

    when consuming fats,the healthiest choice is food high in .saturated fats .unsaturated fats .trans fats .cholesterol *** is it D ?
  15. 1 question Science check answer

    4. Which is NOT a true statement? a. Not all fats are bad for you. b. Fats can increase your risk for heart disease. c. Saturated fats are liquid at room temperature. d. Unsaturated fats come mainly from plant foods. my answer is C. I that right
  16. health

    Saturated fats are found primarily in A. animal products. B. alcoholic beverages. C. fruits and grains. D. vegetable oils
  17. nutrition

    When we hear the word “fat,” many may associate it with weight gain or junk foods. However, lipids and fats are an essential part of the diet. Fats and lipids come in several different forms (i.e. monounsaturated, polyunsaturated, saturated, trans
  18. chemistry

    Cloves contain two principal essential oils, caryophyllene and eugenol. A student carrying out a steam distillation using cloves obtained a mixture of these two oils in the distillate. Explain how the student could separate and isolate the two essential
  19. Chemistry

    Concentrated aqueous ammonia contains 1.00 mol NH3 dissolved in 2.44 mol H20. What is the mole fraction of NH3 in concentrated aqueous ammonia? What is the molal concentration of NH3
  20. Chemistry Urgent Help Please!

    You use 100 ml ethylchloride (density 0.92 g/ml) to extract 25 ml ethylene bromohydrin (density 2.41 g/ml) mixed with 100 ml. Is the aqueous layer the lower or the upper layer. How could you easily test this. You dissolve sodium chloride 40g. in the above
  21. Organich Lab Help Please!!!!!!!!

    You use 100 ml ethylchloride (density 0.92 g/ml) to extract 25 ml ethylene bromohydrin (density 2.41 g/ml) mixed with 100 ml of water. Is the aqueous layer the lower or the upper layer. How could you easily test this. You dissolve sodium chloride 40g. in
  22. Chemistry

    Concentrated aqueous ammonia contains 1.00 mol NH3 dissolved in 2.50 mol H2O. What is the mole fraction of NH3 in concentrated aqueous ammonia?
  23. 1 chem question

    A base has a Kb of 2.5 x 10–11. Which of the following statements is true? This is a concentrated base. This base ionizes slightly in aqueous solution. This is a strong base. An aqueous solution of this base would be acidic. (do explain. i don't
  24. CHEMISTRY (PLEASE HELP)

    My question is about Determination of Iodine Value in Fats & Oils experiment. I can't seem to get the right IV for coconut oil (Iv = 7-11 range). I followed the procedure used by American Oil Chemists Society, but still I'm getting an IV value of around 1.
  25. chemistry

    Which of the following statements about alkali metals is true? alkali metals have full valence shells alkali metals form 1- cations alkali metals are very reactive alkali metals form 2- cations please help
  26. Organic chemistry recrystallization

    Say you have a substance X will .5 g of X dissolve in 5.0 ml of water if boiled at 80 degrees? And at what temperature will crystals begin to form?
  27. chemistry

    Butlylated hydroxytoluene (BHT) is used as an antioxidant in processed food. (It prevents fats and oils from becoming rancid.) A solution of 2.500 g of BHT in 100.0 g of benzene had a freezing point of 4.880⁰ C. What is the molecular weight of BHT?
  28. Science Project topic question

    If you are looking into comparing the effects of various oils on pseudomonas aeruginosa, what will you search for aside from the oils you're thinking of testing it on the bacteri and the infection?
  29. science

    1. Which is not a characteristic of the group 1 alkali metals? A. High densities B. Low melting points C. Found in batteries D. Silvery solid 2. which of the following is true of the group 2 alkali earth metals A. they are less dense that the group 1
  30. chemistry

    What volume (in milliliters) of 0.496 M aqueous ammonia, NH3, could be made from 17.6 mL of concentrated aqueous ammonia (15.0 M)? (atomic masses: N = 14.01, H = 1.008)
  31. Chemistry

    What volume (in milliliters) of 0.355 M aqueous ammonia, NH3, could be made from 19.9 mL of concentrated aqueous ammonia (15.0 M)? (atomic masses: N = 14.01, H = 1.008)
  32. physics

    You prefer soft-boiled to hard-boiled eggs, but you hate waiting next to your eggs to check if they're cooked. Therefore, you want to determine how often do you need to check the eggs so that they're not overcooked. What time does it take in minutes for a
  33. physics

    You prefer soft-boiled to hard-boiled eggs, but you hate waiting next to your eggs to check if they're cooked. Therefore, you want to determine how often do you need to check the eggs so that they're not overcooked. What time does it take in minutes for a
  34. physics

    You prefer soft-boiled to hard-boiled eggs, but you hate waiting next to your eggs to check if they're cooked. Therefore, you want to determine how often do you need to check the eggs so that they're not overcooked. What time does it take in minutes for a
  35. Chemistry

    A compound D, CH3CHCLCH2CH3 was boiled under reflux for some time with dilute NaOH solution.. Dilute nitric acid was then added to the mixture, followed by dilute silver nitrate solution. A Few drops of concentrated ammonia solution were then added. What
  36. Chemistry

    To culinary experts and to the average person the term “Extra Virgin” has a ring of exclusiveness and quality to it. When it comes to olive oil, exactly what does this term signify? I am supposed to explain the chemistry behind Extra Virgin Olive oils,
  37. chemistry

    To culinary experts and to the average person the term “Extra Virgin” has a ring of exclusiveness and quality to it. When it comes to olive oil, exactly what does this term signify? I am supposed to explain the chemistry behind Extra Virgin Olive oils,
  38. Chemistry

    Consider trying to dissolve both calcium chloride in aqueous solution. a. Predict which salt is more soluble and write its formula. b. Explain your prediction in part a above by qualitatively comparing the bonding and solvation energies for the two salts.
  39. Chem I

    Ok here is another one! Concentrated aqueous HClO4 has a concentration of 14.8 M. Calculate the concentrations of ALL ions present in a solution prepared by pipetting 5.00mL of concentrated HClO4 into a 1000.0-mL volumetric flask and filling to the mark.
  40. Chemistry

    Item 1 Maleic acid is a carbon-hydrogen-oxygen compound used in dyeing and finishing fabrics and as a preservative of oils and fats. •In a combustion analysis, a 1.054-g sample of maleic acid yields 1.599 g of CO2 and 0.327 g of H2O. •When 0.609 g of
  41. Chemistry Urgent Help and Check Please!

    a) You use 100 ml ethylchloride (density 0.92 g/ml) to extract 25 ml ethylene bromohydrin (density 2.41 g/ml) mixed with 100 ml. Is the aqueous layer the lower or the upper layer. How could you easily test this. ----- Ethylchloride is less dense so it is
  42. Organic Chem Help

    You use 100 ml ethylchloride (density 0.92 g/ml) to extract 25 ml ethylene bromohydrin (density 2.41 g/ml) mixed with 100 ml. Is the aqueous layer the lower or the upper layer. How could you easily test this. ----- Ethylchloride is less dense so it is the
  43. Organich Lab Help Please!!!!!!!!

    a) You use 100 ml ethylchloride (density 0.92 g/ml) to extract 25 ml ethylene bromohydrin (density 2.41 g/ml) mixed with 100 ml. Is the aqueous layer the lower or the upper layer. How could you easily test this. ----- Ethylchloride is less dense so it is
  44. CHEMISTRY (IODINE VALUE-continuation)

    y question is about Determination of Iodine Value in Fats & Oils experiment. I can't seem to get the right IV for coconut oil (Iv = 7-11 range). I followed the procedure used by American Oil Chemists Society, but still I'm getting an IV value of around 1.
  45. Chemistry

    Water's unique properties allow it to- a.dissolve aqueous solutions b.dissolve ionic and nonpolar covalent molecules c.dissolve ionic and polar covalent molecules d.dissolve ionic, covalent and metallic molecules is it c, because i know water is polar?
  46. Health

    Which fats are considered the "essential fatty acids"? A. saturated fats B. unsaturated fats C. trans fatty acids D. All the above I think it is B or D...? I know A and C are bad for you but they are necessary.
  47. chemistry check answer

    Question: Explain whether using solid NaOH pellets rather than aqueous NaOH would alter the enthalpy. If different, would it be higher or lower My answer: Would the result be different since the aqueous NaOH would be able to quickly dissolve in water
  48. Chemistry

    An alkali is a soluble base. Is barium hydroxide an alkali?
  49. health class

    Can someone help me with this:thanks... "Should we eliminate fats from our diets altogether and increase proteins" "What are some of the benefits that unsaturated fats and proteins provide when included in a balanced diet" This is my opinion on this: I
  50. Chemistry

    What is the molality of each of the following solutions? 1)Dissolve 0.610 mol of citric acid, C6H8O7, in 1.35 kg of water. 2) Dissolve 0.200 mg of KBr in 5.50 mL of water. 3) Dissolve 4.05 g of aspirin, C9H8O4, in 145 g of dichloromethane, CH2Cl2. For some
  51. science

    Just checking my answers.. 1. Which is not a characteristic of the Group 1 alkali metals? A. high densities B. low melting points*** C. found in batteries D. silvery solid 2. Which of the following is true of the Group 2 alkali earth metals? A. They are
  52. chem

    which of the following could be used to dissolve a carboxylic acid into the aqueous phase? a)MgSO4 b)1.5 M HCl c)1.0 M NaHCO3 d)2.0 M Na2SO4 e)saturated NaCl I'm leaning towards choice e because you can have an aqueous solution of sodium salt and a
  53. chemistry

    Alkali metals react with water to form hydrogen gas and the hydroxide of the metal. When 3.55 grams of an alkali metal reacts with excess water, 1020ml of hydrogen gas, measured at STP, are evolved. What is the alkali metal?
  54. Chem Help!

    Assume that a given solution caontains Ag+or Ba2+ or a mixture of both. A reasonable method for doing a qualitative analysis on this solution might be sketched out as followes (remember || means a precipitate forms and | means a solution remains. It is
  55. chemistry

    which of the following liquids have the highest freezing point? a- aqueous Fe(NO3)3 (0.030) b- aqueous glucose (0.050 m) c- aqueous NaI (0.030 m) d- aqueous NaI (0.010 m) e- pure water please explain the concept behind it as well thank you!
  56. nutrition

    Post your response to the following: In our society, there are weight loss programs that recommend low fat, no-fat, or high protein diets. Should we eliminate fats from our diets altogether and increase proteins? What are some of the benefits that
  57. Health

    Which of the following statements is FALSE about hydrogenation? a. Hydrogenation makes fats softer and more liquid so that they become more easily spreadable. b. Hydrogenation helps fats resist rancidity and extends product shelf life. c. Hydrogenation
  58. science

    I have no idea on this one A man put a goldfish into recently boiled water that had been cooled quickly, and it died. Explain what happened to the goldfish. Thanks! The dissolved oxygen in the water was driven out when the water was boiled. The fish died
  59. chemistry

    Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI. Include phases. What mass of precipitate will form if 1.50 L of highly concentrated Pb(ClO3)2 is mixed with 0.350 L of 0.290 M NaI? Assume the reaction goes to completion.
  60. Chemistry

    Identify the major macronutrient by weight in each of the following key ingredients. Olive oil Carbohydrates Fats Proteins Buttermilk/milk Carbohydrates Fats Proteins Neither Distilled vinegar Carbohydrates Fats Proteins Plain Greek yogurt Carbohydrates
  61. From theory and practice

    One component of a healthy diet is a high amount of A. monounsaturated fats. B. sodium. C. grains. D. polyunsaturated fats. Answer is C
  62. childcare

    one component of a healthy diet is a high amount of A monounsaturated fats. polyunsaturated fats. C grains D sodium the answer correct is D
  63. chemistry

    Why do alcohols that show little tendency to dissolve in water appear to dissolve readily in 85% phosphoric acid? Would you describe the latter behavior as solubility or a chemical reaction? Explain
  64. Chemistry

    A base has a Kb of 2.5 x 10–11. Which of the following statements is true? A.This is a concentrated base. B.This base ionizes slightly in aqueous solution. C.This is a strong base. D.An aqueous solution of this base would be acidic. My answer is D...?
  65. Health

    What is the definition for Saturated Fats, and Unsaturated Fats?
  66. Chemistry

    A base has a Kb of 2.5 x 10–11. Which of the following statements is true? This is a concentrated base. This base ionizes slightly in aqueous solution. This is a strong base. An aqueous solution of this base would be acidic.
  67. SCIENCE

    CAN SOMEONE PLEASE HELP ME AND TELL ME IF IM RIGHT even a guess would be good ive been trying 4 a answer since 6:00 PLEASE help me :/ i think that the 2nd one is correct because i no that energy is not lost when water is boiled it is gained because of the
  68. Chemistry

    a mixture of 10cm^3 of C5H12 and 0.084g of C12H24 was passed with an excess of oxygen. after cooling to room temperature, the reaidual gas was passed through aqueous potassium hydroxide. what volume was absorbed by the alkali
  69. Chemistry

    How many grams ofPbCl2will dissolve in 2.00 L of O.650M aqueous Pb(N03)2 solution?
  70. nutrition

    In our society, there are weight loss programs that recommend low fat, no-fat, or high protein diets. Should we eliminate fats from our diets altogether and increase proteins? What are some of the benefits that unsaturated fats and proteins provide when
  71. Chemistry

    If you have two containers with water, one with water at 25 degrees C and the second with water 75 degrees C, explain in which one would you be able to dissolve less CO2 (a gas)? Explain in which one you would be able to dissolve more NaCl (check the
  72. Chem

    Final question.. An alloy used in aircraft construction consists of aluminium, copper and magnesium. An 11.34g sample of alloy was treated with alkali to dissolve the aluminium, leaving a residue of mass 2.73g. This residue was treated with dilute
  73. CHEMISTRY URGENT HELP

    carbon dioxide is moderately soluble in cold water but is completely boiled out if the water is boiled.Solubility increases rapidly with pressure. How is the above phenomenon used in the production of aerated drinks?
  74. Chemistry

    Does the solid Zn(OH)2 dissolve when concentrated lye, NaOH solution, is added to a beaker containing a saturated solution of Zn (OH)2 and a small amount of Zn(OH)2?
  75. science chem

    Please could someone give me a link to a site that explains waht an alkali is? thanks I don't know of a site BUT I probably can find one if you really want it. However, an alkali is simply a base such as NaOH or KOH, or lye. If you still want me to look
  76. science

    Should we eliminate fats from our diets altogether and increase proteins? What are some of the benefits that unsaturated fats and proteins provide when included in a balanced diet?
  77. Chemistry

    What are the elements in Group A1 on the periodic table? alkali metals alkali earth metals inner transition metals ** halogens
  78. Chemistry (Dr. Bob222)

    How can you tell if something is highly concentrated or lowly concentrated? For example: H2CO3, H+, HCO3-, CO3(2- charge), is in order of highest concentration to lowest concentration, can you explain why it is that order? Thanks for your help :)
  79. Please Check Answers for Health

    Please check my answers because I need to do good at this. 1. When consuming fats the healthiest choice is foods high in? A. saturated fats B. unsaturated fats * C. trans fat D. cholesterol 2. The body's main energy source should come from what essential
  80. Organic Chemistry

    A student tried to dissolve 5.0 grams of impure acetanilide in 50 Ml of hot water. However was not able to get it to dissolve. Why not? What would you do to get it to dissolve??
  81. Health and Physical Education 8 - It's urgent!

    Please check my answers because I need to do good at this. 1. When consuming fats the healthiest choice is foods high in? A. saturated fats B. unsaturated fats * C. trans fat D. cholesterol 2. The body's main energy source should come from what essential
  82. Chemistry

    Which one of the following pairs of 0.100 mol L-1 solutions, when mixed, will produce a buffer solution? A. 50. mL of aqueous CH3COOH and 25. mL of aqueous CH3COONa B. 50. mL of aqueous CH3COOH and 25. mL of aqueous HCl C. 50. mL of aqueous NaOH and 25. mL
  83. Chemistry

    How do these react? Some may have no reaction. a. aqueous chromium(III) nitrate plus magnesium metal b. aqueous lithium sulfate plus aqueous barium chloride c. solid lead metal plus aqueous potassium chloride d. aqueous lithium fluoride with aqueous
  84. chemisrty

    the ph of a 4.0 mol/L solution of hydrogen fluoric acid is 3.0 is this a concentrated or diluted explain I believe it is concentrated because 3.0 is higher then 0.5 mol/L but it can also be diluted
  85. chemistry

    Silicon oils are used in water repellents for treating tents, hiking boots, and similar items. Explain how they function.
  86. chemsitry

    What ions are very important for the proper fuctioning of biological systems such as nerves and cells? A)alkali earth metals B)hydrogen ions C)oxygen ions D)nitride ions E)alkali metal ions
  87. chem help ASAP!!!!

    What ions are very important for the proper fuctioning of biological systems such as nerves and cells? A)alkali earth metals B)hydrogen ions C)oxygen ions D)nitride ions E)alkali metal ions my choice is A or C can anyone help?
  88. chemistry

    which alkali metal form superoxidess?(2)explain why rubidium has a short life?
  89. Percentages

    Some doctors recommend that no more than 30% of a person's daily calories come from fats. Following this recommendation, if you eat 2,400 calories in a day, what is the maximum number that should come from fats? I can figure the answer out all by myself, I
  90. Chemistry

    Given that the solubility of sodium chloride is 36 grams per 100 grams of water. Which of the following solutions would be considered supersaturated? A. dissolve 5.8 moles of NaCl in 1 L of water B. dissolve 1.85 moles of NaCl in 300 ml of water C.
  91. chemistry

    The typical person needs a 2000 calorie diet to sustain “normal” activity. Nowadays, a lot of the energy in American diet comes from fats and sugars. Assume that “fats” provide 9.0 calories per gram and sugars (treat as glucose) provide 4.5
  92. chemistry

    1. why is it necessary to use boiled and cooled water in the dilution of the carbonate sample? 2. an aliquot of the diluted sample is titrated with some standard HCl until near the equivalence point, then it is boiled for 2-3 minutes. why should we boil
  93. Qualitative analysis

    Aqueous sodium hydroxide is added to a mixture of an aqueous solution of X with some aluminium alloy. On warming, ammonia gas is evolved. When X is treated with aqueous ammonia, a white precipitate that is soluble in excess aqueous ammonia is obtained.
  94. chemistry

    As a research chimst, you are intrested in studying the extent and type of interactions in aqueous salt solution. As part of this study, you weight three samples of NaCl and dissolve each in 1.000kg H2O. You then measure the freezing temp. of each solution
  95. chemistry

    when water is boiled in a pot, it bubbles. Has a chemical reaction occurred? Explain your answer.
  96. chem

    you are trying to dissolve 5 grams of sugar in 1 L of water. The sugar will not dissolve fast enough. Explain how you can increase the rate of dissolving? do you increase temperature?
  97. chemistry/toxicology/instrumental analysis

    A standard curve was produced using absorbance values of prepared standards obtained by UV spectrophotometry. The standards were made using concentrated hydrochloric acid as opposed to the 1N HCl that the lab manual says should be used. Because of this my
  98. Spanish

    World Cup athletes eat diet consisting of a. protein, carbohydrates, and healthy fats.*** b. sugar, fluids, and herbs. c. grains, dairy, and protein. d. healthy fats, salt, and nuts.
  99. chemistry

    Aqueous ammonia is commercially available at a concentration of 16.0 M. Part A How much of the concentrated solution would you use to prepare 500.0mL of a 1.30M solution?
  100. Chemistry

    Maleic acid is a carbon-hydrogen-oxygen compound used in dyeing and finishing fabrics and as a preservative of oils and fats. * In a combustion analysis, a 1.054-\rm g sample of maleic acid yields 1.599 \rm g of \rm CO_2 and 0.327 \rm g of \rm H_2O. * When