1. Chemistry

    Identify the following chemical equations by type. 1. If an electric discharge produces 500 cm3 of ozone (O3), how many cm3 of oxygen (O2) are required? 3O2(g) ---> 2O3(g) 2. When 2.75 dm3 of O2 react with an excess of glucose (C6H12O2), according to the reaction below, ...
  2. Physics

    To stop a car, you require first a certain reaction time to begin braking. Then the car slows under the constant braking deceleration. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 80.0 km/h, and 24.4 m when the ...
  3. O-Chem

    A student wished to prepare ethylene gas by dehydration of ethanol at 140 C using sulfuric acid as the dehydrating agent. A low-boiling liquid was obtained instead of ethylene. What was the liquid, and how might the reaction conditions be changed to give ethylene? I know that ...
  4. Language

    Try to sokve this compound puzze. A)(puzzle #1) Cook= book Volley= Express= Fore= Wrist= Loud= Key= B)(puzzle #2) Case= Park= Side= Stone= Tower= Phone= Walk=
  5. Math

    How would you solve these compound inequalities word problems? 1. The human ear can distinguish sounds between 20Hz and 20,000 Hz, inclusive. 2. For a man to box as a welterweight, he must weigh more than 140 lbs, but at most 147 lbs.
  6. Science

    What are the differences between these things? 1. substance vs. mixture 2. homogeneous vs. heterogeneous 3. solute vs. solvent 4. saturated vs. supersaturated 5. concentrated vs. dilute 6. element vs. compound 7. aqueous solution vs. universal solvent 8. soluble vs. insoluable
  7. English

    Regardless of whether the uranium was solid or pulverized, pure or in a compound, wet or dry, or whether exposed to light or heat. --This is just a section of a sentance and I would like to know what word I can use instead of pulverized. And don't just give me dictionary,com ...
  8. chemistry

    the fictitious compound pandemonium carbonate has a ksg=3.091*10^-9 M 3 in water at poor temperature .calculate the solubility of PnCo3 in an aqueous solution of 1.11 M pandemonium sulfate. express your answer in units of molarity.
  9. English

    Identify the compound sentence. 1) Last summer, we decided to drive to the beach. 2) Because it had been sunny all week, we did not bring umbrellas. 3) The rain began to fall, but we did not want to leave. 4) While it rained on the beach, we swam in the ocean. This one I think...
  10. Quantitative Analysis

    The dibasic compound B (pKb1 = 4.00, pKb2 = 8.00) was titrated with 1.00 M HCl. The initial solution of B was 0.100 M and had a volume of 100.0 mL. Find the pH at the following volumes of acid added and make a graph of pH versus Va; Va=0, 1, 5, 9, 10, 11, 15, 19, 20, and 22mL.
  11. Math

    Combine the three simple statements below in a compound sentence of the form . That is, provide a written statement in which you translate this symbolic statement to English. p: the ball is lost q: he will drink wine r: the boy rides the bike
  12. english

    Combine these sentences into one sentence using conjuctions,adverbal connectives to create compound sentence. The door opened. The crooked little cotton -eyed piano player stood in the entrance. He was waiting for a sound to tell him where she was. Thank you.
  13. Mathematics

    a credit union pays 8 percent per annum compound interest on all fixed deposits. a consumer deposited $24000 in an account. calculate the total amount of money in the account at the end of two years.
  14. Chemistry

    1. Identify the organic compound type for each of the following (for example: ketone, ester, etc) A. Propanol B. CH3COOH C. ROR D. CH3NH2 E. Methyl methanoate My answers: A. Alcohol B. Ethanol C. Ether D. Ammonia E. Ester Please help correct what I’m wrong on.
  15. science

    The compound 1-iodododecane is a nonvolatile liquid with a densityof . Thedensity of mercury is.What doyou predict for the height of a barometer column based on1-iodododecane, when the atmospheric pressureis 748 ? answer in meters
  16. Chemistry

    The compound butane, has two structures. They have the same molecular formula but different arrangements of bonds in their structures. As a result, they can have different chemical and physical properties. Draw the lewis structures of all the isomers of pentane, C5H12. I am ...
  17. organic chem, crude mix

    how do i know if the flex column in TLC successfully separated the three crude compounds(which were experimented and had rf values of , 0,0.5 and 0.55) in the crude mixture. Also which compound elutes first? And what is the reason for it to elute first?
  18. chem

    choose the compound below that contains at least one polar covalent bond, but is nonpolar a. ICl3 b SeBr4 c. CF4 d. HCN Im stuck between C and D C is a tetrahedral which has no net dipole so is non polar, and D is linear which also makes it non polar.
  19. English

    Which sentence below includes a compound verb? A The wolf pounced on a mouse and ate it. B The wolf's underfur grew dense and thick C Hares and caribou are among the wolf's prey☺ Am I correct?
  20. chemistry

    Ok, so using Le Chatelier's Principle If you add heat to an exothermic reaction, the equilibrium will shift to the left. If you remove heat to an exothermic reaction, the equilibrium will shift to the right. What is it for an ENDOTHERMIC reaction? If you add a substance, the ...
  21. Chemistry

    I know that benzaldehyde decomposes into benzoic acid and benzyl alcohol via Cannizzaro Reaction.. But, can benzyl alcohol go through a Cannizzaro Reaction to form benzaldehyde and benzoic acid?
  22. chem help!

    A reaction has an equilibrium constant very much less than 1. Will the reaction proceed spontaneously? A. Yes, because products are favored and deltaG° < 0. B. Yes, because reactants are favored and deltaG° > 0. C. No, because reactants are favored and deltaG° > 0...
  23. chemistry

    A reaction has an equilibrium constant very much less than 1. Will the reaction proceed spontaneously? A. Yes, because products are favored and deltaG° < 0. B. Yes, because reactants are favored and deltaG° > 0. C. No, because reactants are favored and deltaG° > 0...
  24. Chemistry

    Compare and contrast two elements combining to form a compound and two compounds combining to form a mixture.
  25. chemistry

    you are given a sample mass of 250g compound that is 45% water. How many grams of water can be recovered from the sample by dehydration?
  26. algebra

    If $8,500 is deposited in a compound interest account paying 3.9% interest annually, how much will be in the account after 12 years?
  27. Chemistry

    Do impurities raise or lower the property of an organic compound such as lower or raise an equivalent weight?
  28. Chemistry

    For the compound Ge[S(CH2)4 CH3)]4 determine: a.) the ratio, by number, of C atoms to H atoms b.) the ratio, by mass, of Ge S THANKS!
  29. Chemistry

    Calculate the osmolarity of a 2.0 × 10-3 M Na3PO4 solution. Na3PO4 is an ionic compound and produces an electrolytic solution.
  30. geometry

    Let p represent a true statement, while q and r represent false statements. Find the truth value of the compound statement. ~[(~q V p)^ ~r]
  31. maths

    The difference of compound interest and simple interest on an amount at the rate of 12% per annum for 2 years is Rs. 90/- then the amount will be -
  32. Maths

    The difference between the compound interest and simple interest on a certain sum for 2 years at 6 % per annum is rs. 90. Find the sum.
  33. Geometry

    Let p represent a true statement, while q and r represent false statements. Find the truth value of the compound statement. ~[(~q V p)^ ~r] this is the ?
  34. Chemistry

    What kind of compound is table salt and how does it dissolve in water? Would salt dissolve in vegetable oil? Why or Why not?
  35. 2nd grade

    What 2 words make this compound word? The word is cowgirl. Also name two words in the ill family
  36. Chemistry

    Identify the following as a complex ion or coordination compound: 1) [Co(NH3)3Cl3] 2) [Co(NH3)3Cl2]Cl 3) [Ni(NH3)4]^2+ 4) [Cu(NH3)4]^2+
  37. geometry

    let p represent a true statement, while q and r represent false statements, find the truth value of the compound statement ~[(p^q)^r]
  38. algebra 2

    If $8,500 is deposited in a compound interest account paying 3.9% interest annually, how much will be in the account after 12 years?
  39. chemistry

    how do you tell whether or not a compound is polar or non-polar?
  40. chemistry

    how do you tell whether or not a compound is polar or non-polar?
  41. chemistry

    how do you tell whether or not a compound is polar or non-polar?
  42. Chmistry

    For the following reaction, 4.35 grams of hydrogen gas are allowed to react with with 10.3 grams of ethylene (C2H4). hydrogen (g) + ethylene (C2H4) (g) ethane (C2H6) (g) What is the maximum amount of ethane (C2H6) that can be formed? grams What is the FORMULA for the limiting ...
  43. Biomechanics

    A person with a body mass of 65 kg was running over level ground with a strong tailwind, while wearing a 10 kg weighted vest. The tailwind applied a force of 125 N to the runner’s body in the horizontal direction. Early in the stance phase, the runner generated a vertical ...
  44. chemistry

    3.) One method used in the eighteen century to generate hydrogen was to pass steam through red-hot steel tubes. The following reaction takes place: 3Fe(s)+4H20(g)--->Fe3O4(s)+4H2(g) 1. What volume of hydrogen at STP can be produced by the reaction of 6.28 g of iron? 2. What...
  45. Chemistry

    Given the reactant side of the total ionic equation for the neutralization reaction of ammonium hydroxide (NH4OH) with hydrochloric acid (HCl), write the total ionic equation (also known as the complete ionic equation) by entering both the reactant and the product species, ...
  46. Chem

    First off, thanks for the help on the other problems... For the reaction, A(g) + 2 B(g) <==> 2 C(g), Kc = 1 x 10-10 at 25°C. Which of the following statements is true? 1. Delta n = +1 2. The concentration of the products is greater than the concentration of the ...
  47. Solar Energy - Engineering

    In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O --> H2 + ½O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential for the hydrogen ...
  48. Chemistry

    Please Help me with my chemistry Review I have a test tommorow? Please help me with my review my test average is low and i need at least a b to pass the class for the six weeks I am freaking out!!!! I care more about showing work i don't want answers I just want help on how to...
  49. chemistry

    My chem book gives me the following Hess' Law example: Mg + 2HCl --> H2 MgCl2 Delta H1 MgO +2HCl --> H2O +MgCl2 Delta H2 H2 + 1/2 O2 --> H2O Delta H3=-68.3kcal The desired reaction is the formation reaction of MgO as follows: MgS +1/2 O2 --> MgO Delta H final= ...
  50. Chemistry please help

    Elemental mercury was first discovered when a mercury oxide was decomposed with heat, forming mercury metal and oxygen gas. When a 0.204-g sample of the mercury oxide is heated, 0.189 g of mercury metal remains. a)what is mole ratio of mercury to oxygen in the sample? would it...
  51. CHEMISTRY

    Hello, I am having trouble balancing this redox reaction WITHOUT using the half-reaction method. I believe this is because not all of the elements are in (aq). BrO3-(aq) + N2H4(g) --> Br-(aq) + N2(g) Br is reduced by a factor of 6. N is oxidized by a factor of 2. I will ...
  52. Organic Chemistry

    Use the data below from an electron impact mass spectrum of a pure compound to deduce its structure. Mass Spectrum M/z Relative intensity 66 32 64 100 49 26 29 72 28 83 27 60
  53. chemistry

    a sample of compound C,H,N and O with a mass of 0.6216 was found to contain 0.1735g C,0.01455g H,0.2024g N.Its molecular mass 129.calculate its epirical and molecular formulas.
  54. Business Math

    Compute the amount of compound interest earned in 1 year for an investment of $1,000,000 with a nominal interest rate of 8% compounded quarterly.
  55. English

    Identify the choice that best describes the word "reassuring" Although I do not pretend to understand the science behind it, this is reassuring to me. adverb*** adjective article compound adjective *** - My Answer
  56. Chemistry

    There was this problem on a test that I took recently. But, I never learned how to solve this. The problem was: it gave the mass of a certain compound and stated that it had 92% carbon. then it asked for the theortical yield of Carbon.
  57. math

    Please help I know to figure out simple interest but what is the best way to figure out compound interest example 8,000 invested for one year at 6 % compounded quarterly (with the answer rounded to the nearest dollar
  58. Chemistry

    Rank the compounds by stand molar entropy. F2(g), Ne(g), HF(g) I am a little confused by this question, wouldn't it be ranked by the molar mass of each compound? So, F2(g) is the highest and HF(g) is the lowest in entropy?
  59. Business math

    Find the future value of $1000 which was invested for: a) 250 days at 10% compounded daily Should I use 365 or 360 days to compound daily? Thanks in advance
  60. business math

    compute the amount of compound interest earned in 1 year for an investment of 1,000,000 with a nominal interest rate of 8% compounded quarterly.
  61. Finance

    Find the future value one year from now of a $7,000 investment at a 3 percent annual compound interest rate. Also calculate the future value if the investment is made for two years.
  62. chm

    How would you classify the following material?swimming pool water homogeneous mixture<<< heterogeneous mixture a pure element a pure compound depends on how many children have been in it
  63. Chem!!!:/

    Determine whether of not each compound will be more soluble in acidic soln than in pure water. Explain. A). Hg2Br2 B). Mg(OH)2 C). CaCO3 D). AgI I think acid, neutral,acid,neutral ??? Help please!:) thAnks
  64. Chemistry

    What is wrong with or ambiguous about the phrase "four molecules of NaCl" I really don't understand my textbook says in the back that it is an ionic compound so I guess that its not really a molecule then I don't understand...
  65. chemistry

    Identify common properties of the molecules in a compound with a liquid crystal phase contain ions contain aromatic groups contain polar groups have long molecules
  66. Math

    You invest your $20000 savings in a term deposit for 3 years at 5.5% p.a. compounding monthly. The compound interest formula is A=P(1+r/n)(to the power of)nt Would it be - P=20000 r=5.5 n=12 (months) t=3 (years)
  67. Algebra

    Solve the compound inequality. >−2x3−11 or ≥+3x36 Write the solution in interval notation. If there is no solution, enter ∅ .
  68. chemistry

    A given sample of a xenon fluoride compound contains molecules of the type XeFn where n is some whole number. Given that 9.03 × 1020 molecules of XeFn weighs 0.368 g, determine the value for n in the formula.
  69. Algebra

    Solve the compound inequality. >−2x3−11 or ≥+3x36 Write the solution in interval notation. If there is no solution, enter ∅ .
  70. Maths Compound Interest

    In a experiment the count of bacteria was increasing at the rate of 2.5% per hour. Initially, the count was 512000.Find the bacteria at the end of 2 hours?
  71. Chem !!!!!!!!!!!!!!!!

    a) What properties are important for a solvent to be used to extract a compound from an aqueous solution? b) When carrying out an extraction what are the advantages/disadvantages of having your extraction solution more/less dense than water? Thank you!
  72. English

    Please help me I am stuck on this one. Which of the following sentences has a compound predicate? 1. Sue and Sara played basketball and tennis all day. 2. With the right investments, Mike thinks he can get rich. 3. My whole family enjoys skiing and snowboarding. 4 Yesterday I ...
  73. Chemistry

    How is the enthalpy change for a reaction related to the enthalpy of the reactants and products? Is it that the enthalpy for the reactants and products equals the enthalpy change for the reaction?
  74. Chemistry

    Propane gas (C3H8) burns completely in the presence of oxygen gas (O2) to yield carbon dioxide gas (CO2) and water vapor (H2O). Write a balanced equation for this reaction. Assuming that all volume measurements occur at the same temperature and pressure, how many liters of ...
  75. Chemistry

    Propane gas (C3H8) burns completely in the presence of oxygen gas (O2) to yield carbon dioxide gas (CO2) and water vapor (H2O). Write a balanced equation for this reaction. Assuming that all volume measurements occur at the same temperature and pressure, how many liters of ...
  76. Chemistry (Regents level)

    1- In the reaction Fe2O3 + 3 CO = 2 Fe + 3 CO2, what is the total number of moles of CO used to produce 112 grams of iron? a) 1.0 b)2.0 c)3.0 d)4.0 2- Given the reaction: 4Al + 3O2 = 2Al2O3 How many moles of Al2O3 will be formed when 27 grams of Al reacts completely with O2? a...
  77. Chemistry

    A student mixes 5.0 mL of 0.00200 M Fe(NO3)3 with 5.0 mL 0.00200 KSCN. She finds that the concentration of FeSCN2+ in the equilibrium mixture is 0.000125 M. Follow these steps to determine the corresponding experimental value of Kc for the reaction of Fe3+ and SCN– to ...
  78. chem

    For the following reaction, 31.1 grams of diphosphorus pentoxide are allowed to react with with 10.2 grams of water. diphosphorus pentoxide (s) + water (l)>>> phosphoric acid (aq) What is the maximum amount of phosphoric acid that can be formed in grams? What is the ...
  79. PSYCHOLOGY am i correct

    The following table describes five situations in which a person reacts to stress in an unhealthy manner. For each: a. identify the stressor(s). b. briefly explain why the person's reaction is an unhealthy choice. c. briefly describe one healthy alternative way of reacting and ...
  80. chemistry

    you are given samples of two pure compounds, one of which is a gas and one of which is a liquid at room temperature. by elemental analysis, both compounds are found to have the following composition (by mass): 52% C 13% H 35% O (a) Determine the empirical formula of both ...
  81. 11th grade AP Chemistry

    Pretend you are a nuclear scientist and try to answer this bonus question. Uranium -235 (235U) is used as a fuel in nuclear power plants. However, natural uranium contains mostly U -238 (238U) and very little uranium -235. Therefore, it is necessary that the natural uranium be...
  82. chemistry

    What is the solubility of AgCl when it is in a solution of 0.15 M NaCl? (AgCl has Ksp = 1.8 x 10-10.) Make a reaction table. Include rows for initial concentration, change in concentration, and equilibrium concentration. Write down the equation for the Ksp of the reaction. ...
  83. chemistry

    given this reaction N2O5 -> 2 N2O + 1/2 O2 all gases and given the initial pressure (P Initial) and total pressure (P total)at any time, relate the partial pressure of N2O5 (PP N2O5) to P total for any time during this reaction. Consider gas kinetics. My teacher says the ...
  84. chemistry

    What is the solubility of AgCl when it is in a solution of 0.15 M NaCl? (AgCl has Ksp = 1.8 x 10-10.) Make a reaction table. Include rows for initial concentration, change in concentration, and equilibrium concentration. Write down the equation for the Ksp of the reaction. ...
  85. chemistry

    Which factors below affect the rate of a chemical reaction? -Collision frequency -Number of collisions having the least activation energy -Intermolecular orientation -Being Exothermic or Endothermic Also, what formula would I use for this problem: "What is the hydroxide ion ...
  86. Chemistry

    The rate law for the reaction NO + O3 > NO2 is rate= k[NO][O3]. What will the effect on the reaction rate if the partial pressure of NO is doubled? What will the effect if the partial pressure of O2 is tripled? Just for clarification: NO will be doubled and O3 would be ...
  87. Chemistry

    If air is 20% oxygen, and the reaction is 2C2H2 + 5O2 --> 4CO2 + 2H2O, What volume of oxygen would be needed to completely burn 1.00 L of acetylene (C2H2)? I got 2.50 L but I'm not sure it's right. What volume of air would be needed to completely burn 1.00 L of acetylene ...
  88. Chemistry

    Does sodium metal react with potassium hydroxide solution? No. It would be a displacement reaction and this only works if the metal is higher in the activity series than the one it wants to displace. Given that potassium is the highest ranked metal (sodium second), there ...
  89. physics

    Part 1 A motorist traveling at 17 m/s encounters a deer in the road 48 m ahead. If the maximum acceleration the vehicle’s brakes are capable of is −5 m/s^2, what is the maximum reaction time of the motorist that will allow her or him to avoid hitting the deer? Answer ...
  90. Language Arts

    When the doorbell rang, I just sat down to watch my favorite television show. (The whole sentence is underlined) a. Misplaced modifier b. Subordinate clause c. Complex sentence d. Compound sentence My answer is d.
  91. physics

    A car is traveling at a constant velocity of 21 m/s (about 45 mph). The driver sees a fallen tree lying across the road and hits the brakes after a delay (reaction time) of 245 ms. (1 ms = 10-3 s.) Calculate the distance the car travels during this 245 ms reaction time period...
  92. maths

    Compound Interest: You deposit $1000 in an account with an annual interest rate of r (in decimal form) compounded monthly. At the end of 5 years, the balance is A = 1000(1 + (r/12)) ^60
  93. Chemistry

    A compound is known to be a cesium halide, CsX. If 3.00 grams of the salt is dissolved in exactly 100.0 grams of water, the solution freezes at -0.735°C. What is the chemical formula for the salt?
  94. math

    compound intrest- if there was a chart for 10 years of intrest of a student who was paying a loan when would be the best year to increase his constant annual payment by 5000 dollars for just 1 year
  95. 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
  96. Chemistry

    A protein found in some types of wood-rotting fungi is 0.40% copper by mass. Each protein molecule is known to contain 4 copper atoms. What is the approximate molecular weight of this compound?
  97. chemistry

    how many carbon particles are there in 4.25 mole of C6 H12 O6? i do not get how to solve this. my teacher said something about conversion factors but i still don't understand how u isolate the carbon from the whole compound. can someone please explain how to get to this, step ...
  98. chemistry

    Consider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution coefficient for the solute between ether and water is 20, calculate the percent of the compound that can be recovered with a single extraction with 13.9 mL of ether
  99. chemistry

    200. g of a nonelectrolyte is dissolved in 1.00 kg of water. the boiling point of the solution is then measured to be 101.5 degrees C. What is the molar mass of the compound? The Kb for water is 0.51 degrees Celsius/m
  100. Chemistry

    Consider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution coefficient for the solute between ether and water is 20, calculate the percent of the compound that can be recovered with a single extraction with 13.9 mL of ether.
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