Questions Asked on
April 29, 2010

  1. Chemistry

    What is the boiling point of each solution? a).50mol glucose in 1000g H2O b)1.50mol NaCl in 1000g H2O

    asked by Kim
  2. Chemistry

    An excess of zinc is added to 125 mL of 0.100 M HCl solution, What mass of zinc chloride is formed? Zn + 2HCl ----> ZnCl2 + H2

    asked by Ana
  3. phys101

    in a calorimeter can(water equivalent=40g)are 200g of water and 50g of ice,all at 0 degreea celcius.into these poured 30g of water at 90degrees celcuis.what will be the final temperature of the system?specific capacity of water is 4186j/kg per degrees

    asked by KABELO
  4. chemistry

    Consider the first order reaction A --> products where 25% of A disappears in 24 seconds. What is the half life of this reaction? ...i thought it would just be doubled but it isn't. i'd appreciate an explanation.

    asked by omar
  5. Chemistry

    I have these two questions on my section review that I don't know how to answer. Can someone help me? Please and thank you. 3. Describe in your own words how to prepare 100 mL of a .85 M solution of sodium chloride. 4. If you dissolve 2.00 mol KI in 1.00 L

    asked by Ana
  6. Chemistry

    Determine the freezing points of each 0.20m aqueous solution. a)K2SO4 b)CsNO3 c)Al(NO3)3

    asked by Jack
  7. chemistry

    What is the freezing point of each solution? a)1.40mol Na2SO4 in 1750 g H2O Are these the right steps? 1.40mol Na2SO4 / 1.75kg = .8m 3 * 1.86 degrees C * .8m = 4.46 degrees C 4.46 degrees C - 1.86 degrees C = 2.6 degrees C

    asked by Jack
  8. Physics

    A steel ball has a mass of 4.0 kg and rolls along a smooth, level surface at 62m/s. What is its kinetic energy. At first the ball was at rest on the surface. A force acted on it through a distance of 22 m to give it the speed of 62 m/s. What was the

    asked by Kasmira
  9. college

    Find the minimum initial speed of a projectile in order for it to reach a height of 2039 km above the surface of the earth.

    asked by Anonymous
  10. Chemistry

    Yellow CdS pigment is prepared by reacting ammonium sulfide with cadmium nitrate. What mass of CdS can be prepared by mixing 2.50 L of a 1.25 M Cd(NO3)2 solution with an excess of (NH4)2S? Cd(NO3)2 + (NH4)2S ---> CdS + 2NH4NO3 Could someone give me a step

    asked by Ana
  11. Statistics

    A sample of 12 measurements has a mean of 34 and a standard deviation of 4.5. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 34 each. A. Find the mean of the sample of 14

    asked by Jen
  12. Music

    What literary devices are in the song "Me Against the World" by Tupac Shakur?

    asked by Troy
  13. chemistry

    The gases in a mixture have the following partial pressures at the same volume and temperature: 1,013,000 Pa nitrogen, 700 mm argon, 1.20 atm of helium, 790 torr oxygen, and 0.50 atm of carbon dioxide. Rank these gases in order of increasing mole fraction,

    asked by tete
  14. math

    find all solutions of the equation 4cos^2x-4cosx+1=0

    asked by Brielle
  15. physics

    The charges of two identical aluminum speheres are -24uC and +4.0uC. The spheres are brought together so they simultaneously touch each other. They then separated and placed on the X-axis. What is the net force exerted b one sphere on another after

    asked by leah
  16. physics

    A bullet having a velocity of 680 m/!@#$%^&s a target 510 m away. If the temp. of the air was 18 degrees celsius, how long after the bullet was fired did she hear it hit the target?

    asked by Anonymous
  17. Chem

    What percentage of sodium-24 with a half life of 15.0 hr would remain after 60hours?

    asked by Sarah
  18. Chemistry 103

    How many acetone molecules are present in a bottle of acetone with a volume of 325ml and density of acetone .788g/cm

    asked by Anonymous
  19. Physics

    A 0.409 kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 19.5 N/m. The block rests on a frictionless surface. A 0.0500 kg wad of putty is thrown horizontally at the block, hitting it with an initial

    asked by Carden
  20. algebra

    the last week of a month a car dealership sold 12 cars.A new sale promotion came out the first week of the month and sold 19 cars that week what was the percent increase in sale from the last week of the previous month compared to the first week of the

    asked by Ricardo
  21. Physics

    A child sits in a wagon with a pile of 0.60 kg rocks. If she can throw each rock with a speed of 10 m/s relative to the ground, causing the wagon to move, how many rocks must she throw per minute to maintain a constant average speed against a 3.7 N force

    asked by Carden
  22. Chemistry

    The vapor pressure of nitrogen at several different temperatures is shown below. Temperature Pressure () 65 130.5 70 289.5 75 570.8 80 1028 85 1718 Use the data to determine the heat of vaporization of nitrogen. Determine the normal boiling point of

    asked by HELp
  23. Chemistry

    What volume of 6M HCl and 2M HCl should be mixed to get 2 litres of 3M HCl?

    asked by Sreeraag
  24. Food Chemistry

    Calculate the amounts and pH values for preparing the following acetic acid/acetate buffer solution. 1.) In the first step, If you plan to prepare a 2.00 M sodium acetate in 200.0 mL distilled water, how many grams of sodium acetate should be added in

    asked by Lauren
  25. Chemistry

    If 0.125 L of a 0.100 M solution of Ba(OH02 are mixed with 0.200 L of a 0.0750 M solution of H3PO4, the following reaction takes place. 3Ba(OH)2 + 2H3PO4 ---> Ba3(PO4)2 + 6H2O What mass of barium phosphate is formed? I got 2.51 g Ba3(PO4)2, is that

    asked by Ana
  26. Chemistry

    I don't understand how to do this problem. You mix 1.00 L of 2.00 M BaCl2 with 1.00 L of 2.00 M AgNO3. What compounds remain in the solution, and what are their concentrations? BaCl2 + 2AgNO3 ---> 2AgCl + Ba(NO3)2 Is it trying to trick me with the two sets

    asked by Ana
  27. Physics

    A child who has a mass of 17 kg slides down a slide from a height of 3.3 m. If friction does a non-conservative work of -143 J, what is the speed (in m/s) of the child at the bottom of the slide? The acceleration due to gravity is 9.81 m/s2

    asked by Fallon
  28. Physics

    A 61.8 kg skier coasts up a snow-covered hill that makes an angle of 26.0° with the horizontal. The initial speed of the skier is 6.10 m/s. After coasting a distance of 1.86 m up the slope, the speed of the skier is 4.48 m/s. Calculate the work done by

    asked by Fallon
  29. college

    Find the rms speed of a helium molecule at 321 K

    asked by Anonymous
  30. Physics

    You are holding a shopping basket at the grocery store with two 0.51 kg cartons of cereal at the left end of the basket. The basket is 0.73 m long. Where should you place a (1.8 kg) half gallon of milk, relative to the left end of the basket, so that the

    asked by Carden
  31. 4th grade

    Which pair of numbers, whose sum is 35, have the largest product?

    asked by Mia
  32. college

    Find the rms speed of a helium molecule at 321 K

    asked by Anonymous
  33. Physics

    You are working as a summer intern for the Illinois Department of Natural Resources (DNR) and are assigned to some initial work on water resources project. The department will be overseeing the construction of a dam to create a large fresh water lake that

    asked by jesse
  34. Chemistry

    What is the freezing point of each solution? a)1.40mol Na2SO4 in 1750 g H2O b)0.060 mol MgSO4 in 100g H2O

    asked by Jack
  35. Calculus

    Find the derivative. f(x)=(1+logᴈx)/x f'(x)=[1-ln3-logᴈx (ln3)]/(x²ln3) How do you simplify it further? Thanks.

    asked by sh
  36. Physics

    A 0.400 kg block of wood hangs from the ceiling by a string, and a 0.0700 kg wad of putty is thrown straight upward, striking the bottom of the block with a speed of 6.40 m/s. The wad of putty sticks to the block. How high does the putty-block system rise

    asked by Physics
  37. Biology

    What is the target organs for Luteinizing Hormone and the Follicle Stimulating Hormone?

    asked by Melanie
  38. Collisions

    Suppose a bullet of mass m = 6.96 g is fired into a ballistic pendulum whose bob has a mass of M = 0.677 kg. (a) If the bob rises to a height of 0.141 m, what was the initial speed of the bullet? I got .042 km/s; but its wrong. (b) What was the speed of

    asked by Robert
  39. ohys101(heat)

    a person had a skin temperature of 33degrees celcuis and was in a room where the walls were at 20degrees celcuis.if the emissivity is 1 and the body surface is 1.5meter squad,what is the rate of heat loss due to radiation? alpha=0.000000567W/meter squad k

    asked by KABELO
  40. chemistry

    A balloon is filled to a volume of 5.0 102 mL at a temperature of 28.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 102 K. What is the final volume of the balloon? the answer i got is v=166.66666667 My question is what is

    asked by chase
  41. Chemistry

    How many mL of 0.75M HCl are needed to neutralize 20.0 grams of NaOH?

    asked by Rachel
  42. chem

    What is the wavelength of a 1400 kg truck traveling at a rate of 72 km/h?

    asked by tt
  43. chemistry

    An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30.°C and a pressure of 710. torr. The gas is then compressed to a volume of 27 mL, and the temperature is raised to 800.°C. What is the new pressure of the gas?

    asked by libby
  44. Chemistry

    How many mL of 0.75M HCl are needed to neutralize 20.0 grams of NaOH?

    asked by Rachel
  45. Chemistry

    The equation of nitrogen produced in a deployed air bag is: 2NaN3 + 42.7KJ--->2Na + 3N2. What amount of heat is needed to prepare 0.325kg of N2?

    asked by amanda
  46. physics

    A long horizontal hose of diameter 4.6 cm is connected to a faucet. At the other end, there is a nozzle of diameter 1 cm. Water squirts from the nozzle at velocity 20 m/sec. Assume that the water has no viscosity or other form of energy dissipation. a)

    asked by kris
  47. Chemistry

    In studying the chemistry and qualitative analysis of anions, why wouldn't HCl be a good acid to use to determine the solubility of a silver precipitate in acid solution?

    asked by Matt
  48. chemistry

    What volume of SO2 will result from the complete burning of sulfer in 8L of oxygen?

    asked by christina
  49. chemistry

    how much heat dows a 23.0g ice cube absorb as its temp increases from -17.4deg C to 0.0deg C?

    asked by allie
  50. chemistry

    90Sr is one of the harmful radionuclides resulting from nuclear fission explosions. It decays by a first-order process with a half-life of 28 years. How many years would it take for 99.99% of a given sample released in the atmosphere to disintegrate?

    asked by omar
  51. Horizon

    What would the final volume of water be if 80.0 kJ were added to a 100.0 mL sample at 100.0 degrees Celsius?

    asked by H
  52. algebra

    what is the solution of the following system of equations? y = 0 x = y + 2 a) (0,2) b) (2,0) c) (1,2) d) (2,1) thank you

    asked by kid
  53. chemistry

    An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30.°C and a pressure of 710. torr. The gas is then compressed to a volume of 27 mL, and the temperature is raised to 800.°C. What is the new pressure of the gas?

    asked by libby
  54. statistics

    At a ski area in Vermont, the daytime high temperature is normally distributed during January, with a mean of 22°F and a standard deviation of 10°F. You are planning to snowboard there this January. What is the probability that you will encounter daytime

    asked by john
  55. geometry

    BD is a perpendicular bisector of triangle ABC. XZ is a perpendicular bisector of triangle WXY. Triangle ABC is similar to triangle WXY with a scale factor of 1:2. Part I. Find BD, AB, WZ, XZ and WX. Part II. What is the scale factor of the perimeters of

    asked by Amira
  56. science

    why when carbon dioxide increases it makes the blood more acidic

    asked by Anonymous
  57. trig 30

    Please help I need to solve the following question for x, where 0

    asked by Rae
  58. Chemistry

    Identify the molecule that has polar bonds but is non-polar (net dipole moment is 0) a. CHCl3 b. NH3 c. BCl3 d. SCl2 e. H2S

    asked by Mary
  59. CHEMISTRY

    can we use the molecular formula to predict the shape of a small molecule? Explain.

    asked by dkfdsfdsf
  60. Physics

    During a rescue operation, a 5350 kg helicopter hovers above a fixed point. The helicopter blades send air downward with a speed of 59.0 m/s. What mass of air must pass through the blades every second to produce enough thrust for the helicopter to hover? I

    asked by Robert
  61. Chemistry

    A deep-sea diver uses a gas cylinder with a volume of 13.0 L and a content of 50.1 g of O2 and 33.4 g of He. Calculate the partial pressure of each gas and the total pressure if the temperature of the gas is 22°C. I got PO= 5.82, PHe=15.5 and Ptotal=21.4

    asked by Anonymous
  62. algebra

    what is the solution of the following system of equations? 2y - x = 8 y = 2x + 1 a) (1,2) b) (5,2) c) (2,1) d) (2,5) and the answer i picked is c thank you, poo :)

    asked by poo
  63. math

    ..... Amy finished 6/12 of the problems on her timed test. Jackson finished 4/6 ... the timed test. Did they finish the same fraction of the problems? Explain. ...

    asked by Angel
  64. Chemistry

    I'm stuck...that is i believe I've come to an impossible answer: I need to calculate the equilibrium constant 4Fe(s) + 3O2(g) --> 2Fe2O3(s) First off: Delta G G Fe(s) = 0, G O2(g) = 0, G Fe2O3(s) = -741 (x2) -741 (2) - 0 = -1480 = delta G of reaction at

    asked by Rico
  65. calculas

    Suppose the temperature at 12:00 noon is increasing at an (instantaneous) rate of 3 degrees F. per hour. What is the rate of change of the temperature in degrees C. per hour. Hint: The relationship between degrees F. and degrees C. is linear, zero (0)

    asked by Anonymous
  66. accounting

    E11-9 The following stockholders’ equity accounts, arranged alphabetically, are in the ledger of Marvel Corporation at December 31, 2007. Common Stock ($5 stated value) $1,500,000 Paid-in Capital in Excess of Par Value—Preferred Stock 45,000 Paid-in

    asked by Anonymous
  67. algebra

    Sara and her sister Emily both collect charms for the their charm bracelets. Together they have 42 charms. Emily has 2 more charms than Sara. To figure out the number of charms each girl has, you must first identify the conditions. What are the conditions

    asked by kim
  68. chemistry

    1. when sodium is combined with water, sodium hydroxide and hydrogen gas are produced. How many moles of sodium do you need to make 4.0 mol of hydrogen gas? 2.when aluminium reacts with sulfuric acid, aluminium sulfate and hydrogen gas are produced. How

    asked by Kelcye
  69. science

    why when carbon dioxide increases it makes the blood more acidic

    asked by Anonymous
  70. geometry

    in right triangle ABC, the altitude CD is drawn to hypotynuse AB. The length of DB is 5 units longer than AD. a) If AD = x, express DB in terms of x. b) If CD = 6, write and equation in terms of x to find AD. c) Find AD. d) Find AC.

    asked by Anonymous
  71. social studies

    I have quite a few fill in the balnk questions regarding Russian history luckily i have social studies in 7th period so i could finish it up during lunch but i would like to have it done since it's a study guide can you help

    asked by Anonymous
  72. Chemistry

    The amount of solar radiation received anually in arizona is about 8.4 x 10^6 KJ/m^2. What mass of carbon must be burned into carbon dioxide to produce the same amount of energu in the following reaction? C + 02 --->CO2 deltaH=-393.5Kj

    asked by AdElE
  73. science

    in a certain chemical reaction, two reactants undergo change to form two products why cant you determine what type of reaction occurred from this information

    asked by lady t
  74. answer it

    an adult has about 5 quarts of blood. when he donates a pint for a sick friend, what fraction of his blood does he give away

    asked by Anonymous
  75. Com 220

    How would I compose a full sentence outline on same sex marrige using this thesis: The controversy around same sex marriage is centered in religious or moral convention.Please help an example would be nice. I really do not know where to start.

    asked by Anna
  76. Intermediate Algebra

    Solve 5=6x+9 Used ASCII

    asked by Rose Kendrick
  77. microbiology

    Due to the prospect of interplanetary travel, how would you attempt to isolate and identify a bacterial infection acquired on another planet? This bacteria is unknown to use and does not appear in Bergey's or the manual of clinical microbiology.

    asked by Rachelle
  78. microbiology

    how would you attempt to isolate and identify a bacterial infection acquired on another planet?

    asked by Rachelle
  79. college

    Assume that the life expectancy of U.S. males is normally distributed with a mean of 80 years and a standard deviation of 4 years. What is the probability that a randomly selected male will live more than 85 years?

    asked by Brittney
  80. statistics

    (a)Comparison of GPA for randomly chosen college juniors and seniors: xbar= 3.05, s1 = .20, n1 = 15, xbar2= 3.25, s2 = .30, n2 = 15, á = .025, left-tailed test. calculate d.f. ____________ Standard error ____________ t-calculated ____________ p-value

    asked by peter
  81. astronomy

    What does supernova produce, helium or carbon?

    asked by Anonymous
  82. bones

    if a muscle cell receives a second stimulus while it is contracting will it respond to the second stimulus.explain

    asked by luhgio
  83. math

    If your first 3 exams are worth 60% you get a 70, 68, and 60. Your 4th exam is worth 30% and your attendance is worth 10% you have not missed any days. What is your grade in the class, if you make a 90 or 80 on the final?

    asked by brittany
  84. math

    Steri-strips cost $4.95 per box, there are 100 per box. If an orthopedic surgical group uses 200 Steri-strips a month, how much would be saved in a year by making a single purchase for a year's supply rather that 12 monthly purchases. If they use 200

    asked by debbie
  85. Physics

    Suppose now that the air carts below are both moving to the right initially. The cart to the left has a mass m1 and an initial speed v0; the cart to the right has an initial speed v0/2. If the center of mass of this system moves to the right with a speed

    asked by Carden
  86. physics

    (a) Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to six times the earth's radius of 6.38 106 m. (b) Find the satellite's orbital period.

    asked by Anonymous
  87. Independent learning

    I have to identify 5 ways in which governments (Canadian, to be exact) prevent the spread of communicable diseases.

    asked by AL 87
  88. Physics

    The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 13 g nail when it is struck by a 550 g hammer moving with an initial speed of 4.1 m/s. I am completely confused by this

    asked by Carden
  89. confidentiality of health information

    Dr. Bob's computerized records have been compromised by a hacker, resulting in damages to patients. Which of the following is most true? A. Dr. Bob may be liable if he didn't have proper firewall or other protections. B. Dr. Bob won't be liable. C. Dr. Bob

    asked by Anonymous
  90. Organic Chemistry

    Assuming you have a mixture of 2-nitrophenol and 4-nitrophenol, which solvent would be most suitable for recrystallization if you want to isolate 4-nitrophenol? Water Diethyl ether Toluene Acetone Ethanol

    asked by Maria
  91. APChemistry

    Thank you for your help! I just had a question.. is BaO barium oxide a precipitate? or if I combine MgO with Ba(NO3), will I get BaO and is this a solid?

    asked by Kiki
  92. Organic Chemistry

    Referring to solvent mixtures, which statements are TRUE ? (Select all correct answers.) The solvents of the solvent mixture should have very similar polarities. The solvents of the solvent mixture should have different polarities. The student has to pay

    asked by Nataly
  93. Organic Chemistry

    Which of the following statements are correct? (Select all correct answers.) Breaking the bonds between the solute molecules is an endothermic process Breaking the bonds between the solvent molecules is an endothermic process Formation of the

    asked by Larry
  94. Organic Chemistry

    What are proper techniques to induce crystallization from a saturated solution? (Select all correct answers.) Allowing the solution to cool down. Scratching the outside of the container with a glass rod. Seeding the solution. Adding a solvent that lowers

    asked by Joanna
  95. chemistry(check my answer)

    From the Standard Potential Table in your general chemistry textbook: Which reaction has been chosen as the 'standard' against which every other reaction is measured? A. 2H+ + 2e–H2 B. Li+ + e–Li C. O2 + 4H+ + 4e–2H2O D. F2 + 2e–2F– E. H2 +

    asked by eng
  96. Algebra

    . In this problem, we will analyze the profit found for sales of a certain product. A demand equation (sometimes called a demand curve) shows how much money people would pay for a product depending on how much of that product is available on the open

    asked by Anonymous
  97. astronomy

    What does supernova produce, helium or carbon?

    asked by Anonymous
  98. Physics

    How do you see your reflection in a plane mirror?

    asked by Emily
  99. accounting

    At October 31, Nathan Company made an accrued expense adjusting entry of $1,400 for salaries.

    asked by Anonymous
  100. chem

    I got part 1: What is the pH of the solution created by combining 1.10 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? pH w/HCl =1.12 w/HC2H3O2(aq)= 3.94 But how do you do part two? What are the pH

    asked by Adam
  101. earth and space science

    Materials, such as water, that becomes gaseous easily at room temperature are called volatiles. How does the complete lack of volatiles in lunar rocks support the impact theory of the moon’s formation?

    asked by breana
  102. Computer Programming

    Hoe do I write a program to Create a C++ console application that uses cout to display a box of asterisks?

    asked by Micheal
  103. math

    Write an equation for the hyperbola. It's center is (0,0). Foci:(-4,0), (4,0) vertices:(-3,0), (3,0)

    asked by Anonymous
  104. 7TH GRADE

    HOW DO I STUDY BETTER? WHEN THERE ARE TO MANY DISTRACTIONS IN MY HOUSE. BECAUSE MY TEST GRADES ARE BAD AND THEY ARE PULLING DOWN MY AVERAGE GRADE

    asked by Anonymous
  105. Philosophy

    Does Bonnie Steinbock think committing adultery is okay or not okay?

    asked by Z32
  106. 4th grade

    explain why and how a canadian goose migrates?

    asked by michael
  107. Science

    what environmental factors make high levels of biodiversity possible in most costal waters? Please help!!!

    asked by Anonymous
  108. astronomy

    true or false: The cosmological redshift is a direct measure of the expansion of the universe, thus independent of direction

    asked by laura
  109. English

    Please correct the sentence below, adding punctuation and changing words as needed. The snow was falling fast and was so pretty to behold but we dreaded having to shovel and salt the walkways.

    asked by Christopher
  110. Probabilty

    The public transport system is aware that one person in twenty does not buy a ticket for their trip. The manager decides to challenge 200 travelling people as to charger they have a valid ticket or not. (a) calculate the probabilty that everyone had a

    asked by Anonymous
  111. Organic Chemistry

    Compound A is recrystallized from n-propanol. Given are the following solubilities (in 100 mL of solvent): 160 g/100 °C, 100 g/80 °C, 60 g/60 °C, 20 g/20 °C, 15 g/10 °C and 10 g/0 °C. How many milliliters of solvent are needed to dissolve 80.0 g of

    asked by Maria
  112. writing for the web

    Question 1 This step in planning a Web project involves learning about HTML text editors, the original tools for creating Web pages. Choose a method for creating HTML pages. Gather your materials. Storyboard your pages. Choose a single-page or a multi-page

    asked by Christopher
  113. calculus

    find the area of the regions enclosed by the lines and curves. x+y^2=0 and x+3y^2=2 i know the answer is 8/3, but i don't know how to get it.

    asked by shelby
  114. Organic Chemistry

    Which statements are FALSE about selecting a solvent for recrystallization? (Select all correct answers.) Any solvent can be used for recrystallization as long as the compound dissolves in it. The compound should exhibit a high solubility in the solvent at

    asked by Maria
  115. math

    the last week of the month a car dealership sold 12 cars.A new sale promotion came out the first week of the month and sold 19 cars that week what was the percentage increase in sale from the last week of the previous month compared to the first week of

    asked by Ricardo
  116. chemistry

    What is the oxidation number of Ga in Ga(NO2)3? is it O?

    asked by Sarah
  117. Intermediate Algebra

    Please help me Used the equation Editor (or 9 MsEquation 3.0, found in "insert" then "object) 5=6x+9 6x=5-9 6x=-4 x=-2/3

    asked by Rose Kendrick
  118. microbiology

    whats the 3 major roles the microbiology laboratory (microbiologist) is involved with in the diagnosis of bacterial infections.

    asked by Alice
  119. algebra

    Simplify: 5-3[2(3x-4)+3]

    asked by zach
  120. Geometery

    which describes the compositions of 3 reflections in three distinct line, two of which are paralell?

    asked by Joey
  121. apchemistry

    thank you for your help before---also, what can i react with BaO to get some noticable consequence---how can i show that what MgO was involved in the reaction?

    asked by Kiki
  122. business

    You are a manager in a large, global manufacturing and services organization. You're trying to explain to your grandfather how different your job is from his before he retired ten years ago. You both know how society has changed and you want to explain how

    asked by tpickens1
  123. 3rd grade math question

    OK- my daughter got this question for math homework "Buses leave boston for reno 2X a day, every day. Buses leave reno 2X a day for boston, every day It takes 5 days to travel from boston to reno. if you are traveling to boston how many buses will you meet

    asked by victorie
  124. English

    Can you pleas check if the following sentences are correct? Thank you very much for your help. 1) He has been (or is?) guilt-ridden since the death of his friend. 2) He is unable to take (make?) decisions by himself. 3)News of his suicide brought by the

    asked by Franco
  125. Math

    4 weeks 3 days 13 hours 21 minutes - 2 weeks 6 days 19 hours 31 minutes _______________________________________ This is a subtraction

    asked by Mia
  126. College Chemistry

    Does Vapor Pressure decrease as intermolecular forces increase???

    asked by James
  127. statistics

    A pollster conducts a survey of a random sample of voters in a community to estimate the proportion who support a measure on public health insurance. Let P be the proportion of the population who support the measure. The pollster takes the sample of 200

    asked by Jabaar
  128. Chemistry

    I'm stuck...that is i believe I've come to an impossible answer: I need to calculate the equilibrium constant 4Fe(s) + 3O2(g) --> 2Fe2O3(s) First off: Delta G G Fe(s) = 0, G O2(g) = 0, G Fe2O3(s) = -741 (x2) -741 (2) - 0 = -1480 = delta G of reaction at

    asked by Rico
  129. Econ

    "How does the price and output behavior of a price-searcher compare with that of a price-taker? Be sure to explain your answer fully and illustrate with the appropriate diagrams. What are the implications of this for both allocative efficiency and

    asked by Sara
  130. algebra

    (x-5)(x+19)=585

    asked by al
  131. Calculus

    Differentiate: y=ln(x/(2x+3))^(1/2) y=(1/2)ln(x/(2x+3)) y'=0+(1/2)((2x+3-2x)/(2x+3)²) What's next after the quotient rule?

    asked by sh
  132. algebra

    A boarding kennel can hold 50 more cats than dogs. It can hold 200 dogs and cats. How many cats can it hold? a) 50 b) 125 c) 150 d) 75

    asked by kim
  133. math

    An 8 in. by 10 in. photo is reduced by dividing the length and width by 2. what is the new peritmeter?

    asked by betty
  134. nutrition

    Case Study: Diet for a Patient with Chronic Hunger, Iron Deficiency Anemia, and Lead Poisoning Jonathan, a two-and-a-half-year-old, lives with his mother and brothers at his grandmother's house in Chicago. His mother, Anita, works at a pharmacy to support

    asked by loretta
  135. Algebra

    a. Suppose that a market research company finds that at a price of p = $31, they would sell x = 74 boxes of product each month. If they lower the price to p = $25, then more people would purchase the product, and they can expect to sell x = 80 boxes in a

    asked by Anonymous
  136. algebra

    what is the solution of the following system of equations? 2y + 3x = 8 y = 1/2x a) (2,3) b) (2,1) c) (1,2) d) (3,2) thanks

    asked by kid
  137. algebra

    what is the solution if the following system of equations? y = 2x + 10 3y = -4x a)(5,1) b)(4,-3) c)(1,5) d)(-3,4)

    asked by babe
  138. algebra

    what is the value for y in the following linear system of equations? x - 3y = 6 x = -6 a) -6 b) -4 c) infinite number if solutions d) 0 thank you :)

    asked by babe
  139. algebra

    what is the value for x in the following linear system of equations? 2x + 3y = 6 y =0 a) 3 b) 0 c) infinite number of solutions d) 0

    asked by wan
  140. Math

    What do these factor out too?? (3w^2+w)(-6w-2) (3y^2+y)(6y+2) (6y^2+2y)(-3y-1)

    asked by Michael
  141. algebra

    what is the solution of the following linear system? 5x - 2y = 15 5/3x - y = 5 a)(-2,1) b) none c)(3,0) d) inifinite number if solutions

    asked by candy
  142. calculus

    What is the volume obtained by rotating the graph y=x^2 for 0

    asked by Hallye
  143. trig

    cosxcscx-2cosx=cscx-2

    asked by john doe
  144. Intermediate Algebra

    5=6x=9 Used the equation editor 6x=5-9 6X=-4 X=-2/3

    asked by Rose Kendrick
  145. Math

    Simplify. 1.(-15xy^4)(-1/3xy3) Is the answer for number 1 = -15x^6y^1?Thanks Express the area of each figure as a monomial. 1.A circle with the radius of 5x^3. how would I solve this problem?

    asked by Shadow
  146. 8th grade math

    what is the anwser?? 4c-5=-14c+67

    asked by Austin
  147. math

    Simplify 5-3[2(3x-4)+3]

    asked by zach
  148. Organic Chemistry

    Which purpose does recrystallization serve? (Select all correct answers.) It is used to purify liquids. To separate unreacted solid starting materials from the solid target compound. To remove a solid from a liquid. It is used to purify solids. Improve the

    asked by Maria
  149. chemistry

    I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver nitrate solution. 10.15mL of silver nitrate solution is used. the conc. of NaCl-NaBr mixture is 8g/dm3 I need to calculate the % composition of the NaCl-NaBr mixture.

    asked by albee
  150. Intermediate Algebra

    6x=5-9 (used ASCII) 6x=-4 x=-2/3

    asked by Rose Kendrick
  151. Intermediate Algebra

    Used the Equation Edition 5=6x+9 6x=5-9 6x=-4 x=-2/3

    asked by Rose Kendrick
  152. CHEMISTRY

    I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver nitrate solution. 10.15mL of silver nitrate solution is used. the conc. of NaCl-NaBr mixture is 8g/dm3 I need to calculate the % composition of the NaCl-NaBr mixture. I used the following

    asked by albee
  153. math

    two angles of a triangle are 68* and 86*. what is the measurement of the third angle

    asked by Ricky
  154. business

    200-300 word descrption of an business scenario

    asked by business
  155. Organic Chemistry

    We are doing Aldol condensation, and are asked to find the concentration of the UV-Vis Spectrum. However, I am not sure how to do this. In my lab, it says that methanol and polyethylene cuvette range: 300-700nm are used on the purified product. How would

    asked by Markus
  156. spanish

    what does escribir un cheque mean

    asked by courtney
  157. COM 220

    Can some one please help me come up with an full sentence outline on same sex marriage (opposing it)

    asked by Tom
  158. social studies

    after WWII, what did Americans invest in?

    asked by skinnie
  159. science

    ingredient is 240ug/ml in a 100ml bottle,use 15ml at a time,how many mls of ingredint in 15ml

    asked by bruno
  160. Math

    Simplify. 1.(-5x^2y)(3x^4) Is the answer for this = -15x^6y^1? If not could you explain how to do it? Thanks.

    asked by Shadow
  161. Algebra

    can you walk me through these 4+x/5 < 8 and x-2/3> 2x + 11 Subtract 4 from both sides. x/5 < 4 Multiply both sides by 5. x < 20 Now you try the second inequality. I tried the second one and did not get -7 which is the answer in the book and 36 is the

    asked by Tony to PsyDAG
  162. math

    Mr. Adams has a box containing 14 coins. The coins are either quarters, nickels, or dimes. In the box are 4 quarters. There are 4 times as many dimes as nickels. How many dimes are in the box? I just need the equation set up and I can then take it from

    asked by guitarman
  163. Maths

    how do i find the derivative of y=2sin8(x+pi/4)-12??

    asked by Belle
  164. math

    seven more that some number equals twenty one

    asked by jenny
  165. Ap Chemistry

    What exactly is this question telling me to do? Write the balanced chemical equation for the dissociation of Cu(OH)2(s) in aqueous solution.

    asked by Shawn
  166. math

    Write an equation for the hyperbola. It's center is (0,0). Foci:(-4,0), (4,0) vertices:(-3,0), (3,0)

    asked by Anonymous
  167. 7th grade

    HOW DO I STUDY BETTER? BECAUSE MY TEST GRADES ARE BAD, SO THEY ARE PULLING MY AVERAGE GRADE DOWN.

    asked by Anonymous
  168. Maths

    In january 2009, there were 1600 HNS hospitals, of whitch 113 were Foundation Trust hospitals. What persentage of NHS hospitals are Foundation Trust hospitals? Give your answer to 2 decimal Places.

    asked by DezQ
  169. operations management

    A company requires 5,000 units of a product in a single year. It costs them $100 per order for expenses such as transportation and communication. If the product is carried in inventory, the carrying cost equals 1% of the price of the product for every

    asked by carey
  170. us history

    Do you think the changes in the 1920s gave Americans more control over their lives? Explain

    asked by emily
  171. music

    my daughter in 2nd grade need help with her music homework. her rhythms are ta, too, four, and titi. The words are welcome, spring, wonderful, dynamics, technology and saxaphone. thank you

    asked by amy
  172. Algebra

    1. In this problem, we will analyze the profit found for sales of a certain product. A demand equation (sometimes called a demand curve) shows how much money people would pay for a product depending on how much of that product is available on the open

    asked by Anonymous
  173. visual images and how to use them

    Question 12 Which of the following visual arguments contains an ethical appeal? none of the above 1 a bar chart of 2003 housing construction sales per state an advertisement for corn seed that shows a farmer and his family standing next to a tractor with

    asked by christopher
  174. Geometry

    -Which describes the compositions of 3 reflections in three distinct lines, two of which are parallel? 1. rotation 2. dilation 3. translation 4. glide reflection

    asked by Emmeline
  175. hca/210

    health Identify and describe three causes for the increasing costs of health care

    asked by kalaya
  176. trig

    cos(x+B)=cosxcosB-sinxsinB

    asked by john doe
  177. Lifeskills

    What are good forensic questions i can ask a detective? name a couple please :)

    asked by Angel
  178. Chemistry

    What is the spontaneous disintegration in which two particles and/or electromagnetic radiation are emitted? would it be radioactivity, nuclear energy, fission or fusion? Thank you

    asked by Julie
  179. English

    Please correct the sentence below, adding punctuation and changing words as needed. We found the play was quite intriguing though it was difficult to follow and the audience became engaged with the action onstage and with the actors in general.

    asked by Christopher
  180. college, math

    find the bolume of the solid generated by revolving the region bounded by the graphs of y=sqrt x , y=0, and x=4 about the x axis

    asked by denise
  181. Intermediate Algebra

    6x=5-9 6x=-4 x=-2/3 Used ASCII

    asked by Rose Kendrick
  182. Accounting

    I am going to post the Arcadia work sheet so you will have a better understanding for my question: Arcadia Hospital Income Statement YTD Dec 31, 2005 (Dollars in Millions) Operating Revenues 2005 % of rev Budget Over/(Under) Patient revenues 500 550 less:

    asked by Lauri
  183. Algebra 2

    Evaluate 6!/3!

    asked by Rashonda
  184. chemistry

    How do you make a 100mL solution of 1.50 M of NaCl.

    asked by Matt
  185. psychology

    discuss the psychosocial challenges facing retirees?

    asked by zurah
  186. math

    if a woker produces 175 parts per hour, how many can be produced in 7 hour

    asked by carla
  187. Algebra 2

    What other artists use a style similar to M.C. Escher and his patterns?

    asked by Ana
  188. calculus

    evaluate the indefinite integral integral sign [8/(x ln(1x))] dx = ?????+c

    asked by michael
  189. chemistry

    How would I determine when isomeric dimethylbenzene yields 1 ,2 or 3 mononitro derivatives when treate with HNO3/H2SO4 Thanks in advance

    asked by chloe
  190. Intermediate Algebra

    I need help Used ASCII 6x=5-9 6x=-4 x=-2/3 6x

    asked by Rose Kendrick
  191. Math

    If you drink 1 can of soda each day, about how many milliliters would you drink in one year? (A can of soda is 354mL. Round your answer to the nearest ten thousand mL.)

    asked by Nia
  192. Life orientation

    Based on sustainable development, 5 ways in which the human or enviromental problem impacts on the community?

    asked by Sibongile
  193. microbiology

    list the 5 main processes of diagnosis of a bacterial infection.

    asked by Doug
  194. French

    Could you check these thanks: Directions: Chose the one that best matches. A. Mais elle a une roue de secours dans le coffre. B. Elle brend des leçons de conduite. C. Elle a besoin d'essence. D. Elle doit freiner. 1. Elle va à une auto-école. Answer: B

    asked by Lisa
  195. Math

    Why does a poor white

    asked by kelsey
  196. Math

    Why does a poor white

    asked by kelsey
  197. CJS 200

    Write a 350-700 word response providing an overview of and describing each court level and its responsibilities. Next: Describe the two main differences you found between the state and federal court systems.

    asked by Anonymous
  198. math

    seven more that some number equals twenty one

    asked by jenny
  199. 12th grade

    how do I differentiate y=2sin8(x+(pi/4))-12?

    asked by Belle
  200. math

    What do you do if the bottom number of a fraction is greater than the top number and you are subtracting?

    asked by travis
  201. Romeo and juliet

    At the play's end both families plan to?

    asked by Sadie
  202. ALGEBRA 1

    still working on this and need additional help two houses are for sale on the same street. the second house has 1000 square feet less than twice the square feet of the first house. together the houses have 4400 square feet. what is the square footage of

    asked by DEBBIE
  203. math

    2.3n-8=1.2n+3

    asked by kin
  204. physics

    A box which has a mass of 48 kg is dragged across the floor a distance of 5.9 m. If the coefficient of friction between the box and floor is 0.53, how much non-conservative work is done by friction? The acceleration due to gravity is 9.81 m/s2.

    asked by Fallon
  205. Physics

    Starting from rest, a ball of mass 4 kg experiences a constant force of 8 N. What is the final kinetic energy (in J) of the ball after it has traveled a distance of 1 m?

    asked by Fallon
  206. Physics

    Starting from rest, a ball of mass 3 kg experiences a constant force of 21 N for 12 s. What is the final kinetic energy (in J) of the ball after 12 s?

    asked by Fallon
  207. chemistry

    i nee help in this question any help would be appreciated the question is 1.Given the reaction: A(g) + 2 B(g) ---> C(g) + D(g) ��H = -40 KJ, a. If the activation energy in the forward direction is 80KJ, plot the PE diagram. b. Plot a KE

    asked by john
  208. AP Math

    What pattern do you see in the set of numbers 2,7,12,20

    asked by Graciela
  209. Algebra 1

    factoring common monomials. 8x-32y 21x to third power-6x squared-3 15x+30 6a squared+48a-24 How do I do these? I am seriously confused.

    asked by Sable
  210. Calculus

    Why is this statement true or false the magnitude of vector a + b is greater than and equal to vector a

    asked by Faustaus Legrand
  211. business

    advantages of conflict

    asked by Anonymous
  212. chemistry

    How much water must be added if you want to make 1L of solution that is 6M, into a 3M solution

    asked by sarah
  213. math

    two number have a sum equal to 50. their difference is 16. to figure out what the number are, you must first identify the varibles. what are the variables in this problem?

    asked by ami
  214. Science

    explain the value of wetland to human societies Please help!!

    asked by Anonymous
  215. Econ

    How do i explain the change of evolution of financial markets over the past 2 years? i feel like what i have now is just a simple breakdown of how the crisis happened. any advice?

    asked by Kevin
  216. english

    Instead of being the solution to larger issues like low self-esteem and depression, cosmetic surgery has become the issue." This is my theis, can I please get some help with supportive information to support my thesis. This paper is for cosmetic surgery.

    asked by Goldie
  217. algebra

    what is the solution of the following system of equations? y = -2/3x y = 1 a)(1,-2/3) b)(-3/2,1) c)(-2,3) d)(1,-3)

    asked by poo
  218. Math

    I can figure out the rule for this table INPUT 0 3 6 9 12 OUTPUT 600 540 480 420 360

    asked by Javonna
  219. word study

    ship is to trip as shout is to

    asked by Matt
  220. To PsyDAG

    It has to be on Happiness, and I'm trying to think of a good title~metaphor that represents that state of mind. I'm trying to think of really good ones, but I can't really.

    asked by Sara
  221. PHYS101

    In a calorimeter can(water is melted above?

    asked by KABELO
  222. Chemistry

    Regarding previous post: I don't understand what I'm doing. My book says the answer is .50 M Ba(NO3)2 but I'm not getting that.

    asked by Ana
  223. Ela

    What You Call A Person That doesn't give you your Salary???

    asked by Alisha
  224. algebra

    solve the following system equations x + y = 1 x - 1 = 1

    asked by kid
  225. algebra

    solve the following system of equations. 5x + y = -9 -5x + 2y = 0

    asked by kid
  226. Cultural diversity

    news reports of last 2 years of changes in the us of policies with muslims and arabic members

    asked by hunter
  227. math

    find the missing coordinate. d=5 (b,4) and (2,-1)

    asked by katlin
  228. Math

    X/3+15=3(x-11)

    asked by bobi
  229. Political Science

    I need help on this. What does the term red tape mean, and how does it relate to the federal bureaucracy? To what extent is Congress to blame for bureaucratic red tape? What are some of the benefits of the federal bureaucracy? What are some of the

    asked by Greg
  230. maths

    consider the quadratic functon y=-3(x-1)(x+2)

    asked by ali