1. chemistry

    I would really like help for this question ASAP! pleasee! I thank you ahead of time. The question refers to an experiment using equal volumes of O2 gas and three other gases "X", "Y", "Z", at the same temperature and pressure. If the respective masses are:
  2. chemistry

    I would really like help for this question ASAP! pleasee! I thank you ahead of time. The question refers to an experiment using equal volumes of O2 gas and three other gases "X", "Y", "Z", at the same temperature and pressure. If the respective masses are:
  3. Chemistry

    3. The Haber¡VBosch process for fixation of nitrogen is one of the more important chemical reactions ever invented. Without the invention of this process, which is used to make ammonia for fertilizer, the world¡¦s population would not be as large as it
  4. Chemistry

    Which of the following is a stronger lewis base: cyanide ion or dicarbide ion? I'm assuming it is the dicarbide ion as it is more negatively charged and a compound consisting of 2 carbons is larger and therefore more likely to lose electrons than something
  5. chemistry

    a process stream containing acetone vapour in nitrogen enters a cooler compressor at 65 degree celcius and 1 atm, with relative saturation of acetone equal to 50%. the gas is compressed and cooled to 20 degree celcius to recover 95% of acetone as a liquid.
  6. Statistics

    Hi! I had this one last question on my homework that I wasn't sure about, but, I need someone to check this for me and see if this is right. Thanks so much! Question: The study that looked at prevalence of various appliance in homes in 2001 made a
  7. Finance

    National Telephone and Telegraph (NTT) Company common stock currently sells for $60 per share. NTT is expected to pay a $4 dividend during the coming year, and the price of the stock is expected to increase to $65 a year from now. Determine the expected
  8. chemistry

    when magnesium chlorate under goes decompostion, oxgen gas is realsed in the following reaction: 2KClO3→ 2KCl + 3O2 repeat 2KClO3→ 2KCl + 3O2 when 3.50 grams of potassuim chlorate is decomposed at STP, how many litters of oxgen will be
  9. chemistry

    Ammonia is often formed by reacting nitrogen and hydrogen gases. How many liters of ammonia gas can be formed from 23.7 L of hydrogen gas at 93.0°C and a pressure of 38.9 kPa?
  10. Chemistry

    Ammonia is often formed by reacting nitrogen and hydrogen gases. How many liters of ammonia gas can be formed from 17.2 L of hydrogen gas at 93.0°C and a pressure of 45.8 kPa??
  11. Chemistry

    To clarify, a triple bond between carbon and oxygen is more stable than a triple bond between carbon and nitrogen because oxygen is more electronegative. Is my understanding correct?
  12. Chemistry

    1 N204(l) + 2 N2H4(l) --> 3 N2(g) + 4 H2O(g) If you start with: 5.0 x 10^4 g hydrazine (N2H4) "in the tank": 1) How many moles of nitrogen can be created (assuming 100% yield)? 2) How many moles of water can be produced? 2) What mass of dinitrogen
  13. radioactive decay

    What elements results if one of the neutrons is in a nitrogen neucleus is converted by radioactive decay into a proton? The atomic number goes from 7 to 8, while the atomic weight stays the same. An electron (beta-) is emitted from the nucleus. Actually,
  14. Nutrition

    How many grams of nitrogen are contained in a 2,500 kcal diet that provides 15% of the energy as protein? What would be the approximate weight gain of a person who consumes an excess of 500 kcal daily for one month? Which of the following is an FDA
  15. chemistry

    We have 1 mol of N2 gas that is heated at constant pressure from 300K to 5770K on the surface of the sun. i) Find H and S given that P for nitrogen is (25.7 + 0.0130T) J/mol-K. ii) Now, redo your calculation assuming that the second
  16. nutrition

    How many grams of nitrogen are contained in a 2,500 kcal diet that provides 15% of the energy as protein? What would be the approximate weight gain of a person who consumes an excess of 500 kcal daily for one month? Which of the following is an FDA
  17. chenistry

    this is confusing me so bad!! Nitrogen gas reacts with hydrogen gas to produce ammonia by the following equation: N2(g)+3H2(g)→2NH3(g) If you have 5.79g of H2, how many grams of NH3 can be produced? I said, 2/3 *5.79 = 3.86 but that's not the
  18. Physics

    A 50.0 kg parachutist jumps out of an airplane at a height of 1.00 km. The parachute opens, and the jumper lands on the ground with a speed of 5.00 m/s. By what amount was the jumper's mechanical energy reduced due to air resistance during this jump? so,
  19. CHEMISTRY

    The first-order reaction, SO2Cl2 ¨ SO2 + Cl2, has a rate constant equal to 2.20 ~ 10-5 s-1 at 593 K. What percentage of the initial amount of SO2Cl2 will remain after 6.00 hours?
  20. Maths- Percentage

    in a survey 120 pupils were asked which learning site they would like to visit as part of the learning journey. 24 said A, 36 said B, 54 said C. The rest said D.write the results as pecentages
  21. maths

    if a regular payment is made quarterly into sinking fund,it accrues to $18258.53 after ten years.What is the annual percentage rate paid by the fund?
  22. find the probability

    the incomes of trainees at a local mill are normally distributed with a mean of $1100 and a standard deviation of 150. what percentage of trainees earn less than $900 a month?
  23. Mathematics

    An old table in a furniture store is marked down by 10% from its previous price on five separate occasions. What is the total percentage reduction in price correct to two decimal places
  24. chemistry

    The first-order reaction, SO2Cl2 ¨ SO2 + Cl2, has a rate constant equal to 2.20 ~ 10-5 s-1 at 593 K. What percentage of the initial amount of SO2Cl2 will remain after 6.00 hours?
  25. Computers

    Your company wants to implement a 5-year rotation plan of your computing devices. What percentage of your computer fleet will you have to replace every year in order to achieve this? A. 5 B. 10 C. 20 D. 50 Is the answer C 20
  26. math

    a government bod pays 100 in a year at a discount rate of 5%(assume simple interest). How much did the bond cost? What is the annual percentage rate? Should it be more or less than 5%?
  27. Maths

    The sides of a triangle are 4.53cm, 5.70cm and 6.21cm. By what percentage (correct to two decimal places) is the longest side is greater than the shortest side Working Out please
  28. social studies

    The Department of Health and Hospitals' portion of the 2005-2006 budget was $6,577 million. What percentage of the total state budget did that represent?
  29. Calculus

    The balance in an account triples in 20 years. Assuming that interest is compounded continuously, what is the annual percentage rate? I found the equation: y=e^(xln3/20) assuming that y0=1 I got 5.64%, is that right?
  30. math

    A basketball player with a free throw shooting percentage of 60% gets fouled and goes to the line to shoot two free throws. What are the odds in favor of her making her first shot?
  31. Math

    A basketball player with a free throw shooting percentage of 60% gets fouled and goes to the line to shoot two free throws. What are the odds in favor of her making her first shot?
  32. statistics

    assume that a set of test scores is normally distributed with a mean of 100 and a standard devaiton of 20. Use the 68-95-99.7 rule to find the following quantities: a. percentage of scores greater than 120
  33. math,percentage

    Mr Srinivasan invests 55000$ in a fixed deposit account.the interest rate is 3.3% per year.how much money will he have in the account after 1year? please show your operations clearly.
  34. north seattle college

    2CH3OH + 3O2→ 2CO2 + 4H2O When 9.63 g of CH3OH was mixed with 15.7 g of O2 and ignited, 9.46 g of CO2 was obtained. What was the percentage yield of CO2?
  35. 8th grade math

    i need help NOW: A leather coat costs a fashion store $150. THey will sell it for a 70% profit. Find the profit as a percentage of the selling price.
  36. Maths

    Evelyn has a ribbon 420 cm long. She uses 216 cm to decorate a present., What percentage of ribbon is left> Express your answer correct to 1 decimal place.
  37. Math

    The price of a technology stock was $9.83 yesterday. Today, the price fell to $9.70 . Find the percentage decrease. Round your answer to the nearest tenth of a percent.
  38. statics

    Using the 68-95-99.7rule. Assume that a set of test scores is normally distributed with a mean of 80 and a standard deviation of 25. Use the 68-95-99.7 rule to find the following quantities. percentage of scores greater than 105 is
  39. ststistics

    A sample of 3000 observations has a mean of 86 and a standard deviation of 13. The distribution is bell-shaped. Using the empirical rule, find what percentage of the observations fall in the intervals
  40. Financing and Budget

    Which one of the following categories makes up the largest percentage of a child care operating budget? A. Mortgage or rent B. Supplies C. Food D. Salaries and benefits D.
  41. SCIENCE

    From the following data ,calculate the percentage of KCl in sample of chloride weight of the sample 0.1865, volume of AgNOS required 26.50mL and Ag of AgNO3 =0.008700gram
  42. financing and budget

    which of the following categories makes up the largest percentage of a child care operating budget/ a. supplies b. salaries benefits c. food. mortgage or rent
  43. physics

    A watch manufacturer claims that its watches gain or lose no more than 8 s in a year. How accurate is this watch, expressed as a percentage? Express your answer using one significant figure.
  44. Math

    The scores on the GRE are normally distributed with a mean of 541 and a standard deviation of 89. Use the 68-95-99.7 rule to find the percentage of people taking the test who score between 363 and 541
  45. Math

    The price of a technology stock has risen to $9.68 today. Yesterday's price was $9.57. Find the percentage increase. Round your answer to the nearest tenth of a percent
  46. Math

    The price of a technology stock has risen to $9.68 today. Yesterday's price was $9.57. Find the percentage increase. Round your answer to the nearest tenth of a percent
  47. Chemistry

    Suppose you prepare a sample of paracetamol by reacting 10.0g of p-aminophenol with 15.0g of acetic anhydride. You obtain 10.8g of pure paracetamol as a product. What is the percentage yeild of the reaction?
  48. college chemistry

    Express the concentration of a 0.0620M aqueous solution of fluoride, F-, in mass percentage and in parts per million. assume the density of the solution is 1.00g/mL.
  49. Math

    The scores on the GRE are normally distributed with a mean of 541 and a standard deviation of 89. Use the 68-95-99.7 rule to find the percentage of people taking the test who score between 363 and 541
  50. Chemistry

    Taking into account the "Second Law of thermodynaics", what is the maximum percentage of heat at 700 C that can be converted into electricity if the waste heat was produced as steam at 100 C?
  51. Chemistry

    Taking into account the "Second Law of thermodynaics", what is the maximum percentage of heat at 700 C that can be converted into electricity if the waste heat was produced as steam at 100 C?
  52. math208

    The price of a technology stock was yesterday. Today, the price rose to . Find the percentage increase. Round your answer to the nearest tenth of a percent
  53. Math

    Katie makes 65% of her shots from the free throw line. Can you determine how many consecutive free throws she must make in order to increase her percentage to 68%? Explain.
  54. mamagement operation

    The city of Beljing is studying it Toursits Information Center. The Information collected about tourists arriving at the center is: interval time ( time between Arrivals)in minutes:(3,4,5,6,7)Probabilty percentage(20.2,23.6,31.2,18.4,6.6) The tourist
  55. Math

    What is 503,000,000 as a percentage?
  56. maths

    Given that G=ab, find the percentage increase in G when both a and b increase by 10%.
  57. maths

    Given that T=kx/y , find the percentage increase in T when k, x and y all increase by 20%.
  58. Math

    If you have a $46.75 Markup on a product , What would the percentage of this markup be?
  59. Math

    If 30=100%, and going over my subtracts from 100%. What is my percentage if I get 39?
  60. math

    What is the percentage of 7/8ths? What is the decimal of 7/8ths?
  61. MATH

    WHAT PERCENTAGE OF 186,000.00 IS 30,000.00?
  62. College Chemistry

    If 69.3g of magnesium chloride were produced from a process with a known yield of 78.3%, find the mass of carbon tetrachloride in grams that was used. Equation: 2CCl4 + MgCrO4 -> 2COCl2 + CrO2Cl2 + MgCl2 I was able to solve it but I just don't
  63. Chemistry 11th

    Solid ammonium nitrate breaks down into nitrogen, water vapor, and oxygen. If there was 300g of the solid and the reaction happened under STP find the total volume of the products. (translating words to eqns., balancing eqns., understanding what STP means)
  64. Chemistry

    How does the three dimensional structure of SP3 bonds of Carbon, Nitrogen, Oxygen and Fluorine cause them to form polar or non-polar molecules? The answer must include a 3d diagram of the molecules, and a discussion of the effect of their electron
  65. Math

    Scores on the GRE​ (Graduate Record​ Examination) are normally distributed with a mean of 554 and a standard deviation of 120. Use the 68-95-99.7 Rule to find the percentage of people taking the test who score between 434 and 674
  66. math

    a company borrowed $3100. it must make monthly payments of $178.37 for 18 months to pay off the loan. Ust the constant ratio formula to find the annual percentage rate...thanks for helping me....kk
  67. family law

    A qualified __________ relations order can be issued by a court to require that the retirement benefits of one spouse, or a percentage thereof, be paid to the other. (Points: 5) domestic domicile community marital is it A
  68. Math 120

    Scores on the GRE​ (Graduate Record​ Examination) are normally distributed with a mean of 528 and a standard deviation of 135. Use the 68-95-99.7 Rule to find the percentage of people taking the test who score below 123.
  69. Social Studies ( Check my answer)

    1. What group of people made up the largest percentage of workers in American industry during the late nineteenth century? Native Americans Immigrants *** Plantation Owners
  70. Chemistry

    1 N204(l) + 2 N2H4(l) --> 3 N2(g) + 4 H2O(g) If you start with: 5.0 x 10^4 hydrazine (N2H4) "in the tank": 1) How many moles of nitrogen can be created (assuming 100% yield)? 2) How many moles of water can be produced? 2) What mass of dinitrogen
  71. Nutrition

    You decide to perform proximate analysis on a sample from your best friend's diet. Most abundant component(s) in nitrogen free extract of diet would be: a) insoluble fibre b) starch c) triglyceride d) Sodium and potassium I know the correct answer is b)
  72. Chemistry

    A neutral molecule is identified as a tetrafluoride, XF4, where X is an unknown atom. If the molecule has a dipole moment of 0.63 D, can you give some possibilities for the identity of X? (Select all that apply.) sulfur nitrogen oxygen polonium phosphorus
  73. Chemistry

    3. The Haber–Bosch process for fixation of nitrogen is one of the more important chemical reactions ever invented. Without the invention of this process, which is used to make ammonia for fertilizer, the world’s population would not be as large as it
  74. Chemistry

    What is the definition of amine salts? My answer is: Amino salts are the neutralization reaction when amine deals with a base and reacts with an acid they mold into them. More in depth the amine salts form when a single pair of electrons on a nitrogen atom
  75. Chemistry-DrBob222

    I got 62.9 mL. Is this correct? I think HCl is the LR. A piece of solid magnesium is reacted with hydrochloric acid to form hydrogen gas: Mg (s) + 2HCl (aq) ---> MgCl2 (aq) + H2 (g) What volume of hydrogen gas (in mL) is collected over water at 25
  76. science

    write word equations and balanced chemical equations for each of the following reactions: a)calcium bicarbonate reacts with hydrochloric acid. b)magnesium hydroxide reacts with hydrochloric acid. c)Aluminum hydroxide reacts with hydrochloric acid.
  77. chemistry

    1 L FLASK CONTAINS NITROGEN ALONG WITH A DROP OR TWO OF WATER AT 40C THE TOTAL PRESSURE BEING 760 TORR .IF ALL THE CONTENTS ARE TRANSFERRED TO ANOTHER FLASK OF 0.5L AT THE SAME TEMPERATURE WHAT WILL BE THE PRESSURE SET UP IN THE SECOND FLASK? (AQUEOUS
  78. Chemistry

    1) Consider the following substance: V3N5. What is the oxidation number of vanadium and nitrogen? 2) Consider the following substance: Mn2O7. What is the oxadation number of manganese and oxygen? 3) Consider the following reaction: Al2(SO4)3. What is the
  79. chemistry

    A mixture of gases has the following partial pressure for the component gases at 20 degrees Celsius: oxygen 180.0 torr, nitrogen 3200 torr, and hydrogen 246.0 torr. Calculate the pressure of the mixture.
  80. chemistry

    1 L FLASK CONTAINS NITROGEN ALONG WITH A DROP OR TWO OF WATER AT 40C THE TOTAL PRESSURE BEING 760 TORR .IF ALL THE CONTENTS ARE TRANSFERRED TO ANOTHER FLASK OF 0.5L AT THE SAME TEMPERATURE WHAT WILL BE THE PRESSURE SET UP IN THE SECOND FLASK? (AQUEOUS
  81. chemistry 116

    You have a rigid sealed container held at a constant temperature. You add 3.3 atm of oxygen gas, 1.7 atm of nitrogen and 4.2 atm of methane to it. What is the partial pressure of the oxygen gas in the container
  82. chemistry

    N2 + 2 O2 ---> 2 NO2. Suppose 31.25 g of N and 44.0 g of oxygen react. A. Calculate the mass of Nitrogen dioxide formed. B. Which reactant is the limiting reactant? C. Calculate the mass of the excess reactant left after the reaction. D. Find the %
  83. chemistry

    N2 + 2O2 -->2 NO2 Suppose 31.25 g of N and 44.0 G of O react A. Calculate the mass of Nitrogen Dioxide formed. B. Which reactant is the limiting reactant? C. Calculate the mass of the excess reactant left after the reaction. D. Find the % yield if 52.3
  84. chemistry

    Ammonia and oxygen react to form nitrogen and water. 4NH3(g)+3 O2(g)-2N2(g)+6H2O(g) a.How many grams of O2 are needed to react with 8.00 mol NH3? 8.00 mol NH3 x42.094/4 mol NH3 x32.00 O2/1 mol O2=269gO2
  85. chemistry

    Ammonia and oxygen react to form nitrogen and water. 4NH3(g)+3 O2(g)-2N2(g)+6H2O(g) a.How many grams of O2 are needed to react with 8.00 mol NH3? 8.00 mol NH3 x42.094/4 mol NH3 x32.00 O2/1 mol O2=269gO2
  86. chemistry

    What is the volume of 45.0g of nitrogen monoxide, NO, at 20 C and a pressure of 740 mm Hg? Please someone can check my work is right or not? NO = 14 + 16 = 30 54.0g / 30 = 33.60 L 273K/293K = 0.932 atm 740 mm Hg = 740 torr = 0.974 atm 33.60L x 0.932 x
  87. General Chemistry

    Nitric oxide (NO) reacts with oxygen gas to form nitrogen dioxide (NO2), a dark-brown gas: 2NO(g) + O2(g) -> 2NO2(g) In one experiment 0.886 moles of NO is mixed with 0.503 moles of O2. Calculate which of the two reactants is the limiting reagent.
  88. Physics

    What is the approximate energy required to raise the temperature of 5 L of air by 160 °C? The volume is held constant. (Assume air almost entirely consists of nitrogen, oxygen, and argon, and that it is initially at 273 K. Use the numerical data found in
  89. chemistry

    Which of the following answer choices states a disadvantage of nuclear power generation? (Select all that apply.) production of low and high level radioactive waste production of radioactive tailings from mining uranium air pollution from release of sulfur
  90. Genera Chemistry

    Nitric oxide (NO) reacts with oxygen gas to form nitrogen dioxide (NO2), a dark-brown gas: 2NO(g) + O2(g) -> 2NO2(g) In one experiment 0.886 moles of NO is mixed with 0.503 moles of O2. Calculate which of the two reactants is the limiting reagent.
  91. Chem

    A 12.3 vessel was found to contain N2, Ar He, and He. The total pressure in the vessel was 987 torr and the partial pressures of nitrogen, argon, and helium were 44 torr, 486 torr, and 218 torr, respectively. What was the pressure of neon in the vessel?
  92. ccbc

    A 12.3 vessel was found to contain N2, Ar He, and He. The total pressure in the vessel was 987 torr and the partial pressures of nitrogen, argon, and helium were 44 torr, 486 torr, and 218 torr, respectively. What was the pressure of neon in the vessel?
  93. Chemistry

    Ammonia is produced by the reaction of hydrogen and nitrogen. N2(g)+3H2(g)→2NH3(g)ammonia How many moles of N2 reacted if 0.65mole NH3 is produced? How many moles of NH3 are produced when 1.2moles H2 reacts?
  94. chemistry

    Consider the reaction: N2(g) + 3 H2(g) --> 2 NH3(g). At a particular time, the nitrogen is being consumed at a rate of 0.60 moles/sec. At this same time, what is the rate at which ammonia is being formed? a. 3.0 mol/s b. 0.12 mol/s c. 0.30 mol/s d. 2.0
  95. science

    3. A section of the Periodic Table of the Elements is shown. Based on the positions of the elements, the two elements that have the most similar chemical properties are — A. calcium and scandium B. calcium and titanium C. titanium and vanadium D.
  96. Chemistry [Science]

    Oh gosh... I need help, with like everything... [Show all work] Aluminum nitrite & ammonium chloride react to form aluminum chloride, nitrogen gas and water. What amount of aluminum chloride is present after 43g of ammonium chloride have reacted
  97. holy school

    H2 S + HNO3 --------> NO + H2 O + S 150 g of hydrogen sulfide are dissolved in 3500 mL of water. a. What is the molarity of the hydrogen sulfide solution? b. How many grams of sulfur can be produced from 50 mL of this solution? c. 22.4 L of nitrogen
  98. physics

    how much would you have to raise the temperature of a copper wire(originally at 20degree celcius) to increase its resistance by 15%? express your answer in percentage.note a=0.0068per degree celcius
  99. American Gov't

    Do federal grants represent an appropriate percentage of the total federal budget and gross domestic product (GDP)? Explain, providing at least one (1) supporting fact.
  100. Math

    A spherical balloon expands when it is taken from the cold outdoors into a warm house. If the surface area increases by 50% (factor of 1.50), by what percentage does the radius of the balloon change? a)7.7% b)50% c)100% d)75% e)22%