Most popular questions and responses by lulu
  1. History

    Which option accurately describes Ferdinand Magellan and his motivation for exploring the world? A.)He was a Portuguese explorer who sailed for Spain; he set out to find a better route to the Spice Islands. B.)He was an Italian explorer who sailed for King

    asked on October 5, 2018
  2. Math

    A spinner is divided into 10 equal sections numbered from 1 to 10. You spin the spinner once. Find P(not even). A. 1/3 B. 1/2 •• C. 1/5 D. 1/4

    asked on May 11, 2017
  3. geometry and trig

    If a cylinder with a 4 inch diameter and a 6 inch height holds 1 pound of oatmeal. How much oatmeal will a cylinder (similar) with a 10 inch diameter hold? Volume of 4 in-----24pi volume of 10 in----137pi I get 91 oz choiced are37,44,74, 192

    asked on May 10, 2016
  4. language arts

    1. What is the prepositional phrase in the sentence: The family drove to the store. a. the family drove b. drove to the store c. the family d. to the store *** 2. What is the appositive phrase in this sentence: My mother, Rebecca, loves to eat pumpkin pie.

    asked on May 3, 2016
  5. Math

    a bag contains 7 green marbles, 9 red marbles, 10 orange marbles, 5 brown marbles, and 10 blue marbles. you choose a marble, replace it, and choose again. what is P(read, then blue)? A. 77/164 B. 19/41 C. 90/1681 D. 45/41••

    asked on May 11, 2017
  6. CHEM- solution/freezing piont

    a solution of sulfur (2.560g) in naphthalene (100g) freezes 0.68K lower the freezing point of pure naphthalene (353.10K). for naphthalene, Kf= 6.8K kg mol. calculatem the molecular formula of the sulfur dissolved in the naphthalene?

    asked on October 14, 2010
  7. Riddle

    how did the hunter get hurt while bending over to study some tracks?

    asked on November 22, 2009
  8. calculus

    an open box is to be made from a piece of metal 16 by 30 inches by cutting out squares of equal size from the corners and bending up the sides. what size should be cut out to create a box with the greatest volume? what is the maximum volume?

    asked on November 18, 2011
  9. physics

    a 10-m uniform beam of weight 100N is supported by two ropes at the ends. If a 400N erson sits at 2.0 m from the left end of the beam, what is the tension in the right rope?

    asked on January 21, 2009
  10. chemistry

    What volume of a 0.550 M solution of potassium hydroxide can be made with 14.3 g of potassium hydroxide? (Ignore significant figures for this problem.)

    asked on November 29, 2014
  11. physics

    A car starting at x = 49 m accelerates from rest at a constant rate of 8.0 m/s2. (a) How fast is it going after 10 s? (b) How far has it gone (from x = 0) after 10 s? (c) What is its average velocity for the interval 0 t 10 s? NEED HELP!!!

    asked on August 27, 2012
  12. Math

    a number cube is rolled 150 times. the number 3 comes up 43 times. hat is the experimental probability of rolling a 3? what is the theoretical probability of rolling a 3? A. 43/150 ; 1/6 B. 43/150 ; 1/50 •• C. 1/6 ; 43/150 D. 3/43 ; 1/6

    asked on May 11, 2017
  13. physics

    a lever is 5 m long. The distance from the fulcrum to the weight to be lifted is 1 m. If a 3000 N rock is to be lifted, how much force must be excerted on the lever?

    asked on January 21, 2009
  14. Macroeconomics

    Suppose that Paulie and Vinny each can produce ice cream or t-shirts. it shows the quantity of each good that Paulie and Vinny each can produce in one hour, respectively, if they devote all of their time and effort into making the good. paulie can make 3

    asked on September 20, 2015
  15. Math

    John draws a square on a coordinate plane. Then, he draws an image of the square 3 units to the right of the original square. What is true about the corresponding sides of the original figure and the image? A. The corresponding sides are skew. B. The

    asked on August 26, 2019

    calculate the number of moles of solute present in 124.0g of a solution that is 6.45% glucose by mass.

    asked on October 14, 2010
  17. Social Studies

    1 - How does one person become a citizen? (Select 2) - a person is born in the United States - a person of foreign birth is granted citizenship after living in the U.S. for 5 years - a person of foreign birth successfully completes the naturalization

    asked on October 6, 2016
  18. chemistry

    Make the conversion 8.5 x10^2 cal to Calorie 4.5x10^-1kj to calories

    asked on March 28, 2016
  19. CHEMISTRY- vant hoff

    a 0.100m k2so4 solution has a freezing point of -0.43 degrees. what is the van hoff factors for this solution? kf=1.86degree/m? 0.77 3.0 1.0 2.3 i have used the equation dT=iKfm and get -2.3?

    asked on October 14, 2010
  20. math

    A farmer with 2000 meters of fencing wants to enclose a rectangular plot that borders on a straight highway. If the farmer does not fence the side along the highway, what is the largest area that can be enclosed?

    asked on October 3, 2011
  21. Trigonometry

    Calculate the area: From a point A, proceed east for 300 m to Point B. Then travel 420 m on a bearing S35°E to point C. Then travel along a bearing of S40°W for 500 m to Point D. Then return to Point A.

    asked on July 21, 2012
  22. Social studies

    How die a compound interest rate differ from a simple interest rate? Compound interest rates pay more interest over time Compound interest rates are calculated only once a year Compound interest rates ideally lower than simple interest rates•• Compound

    asked on May 11, 2017
  23. Math

    Molly Ellen, bookkeeper for Keystone Company, forgot to send in the payroll taxes due on April 18. She sent the payment November 8. The IRS sent her a penalty charge of 8% simple interest on the unpaid taxes of $5,900. Calculate the penalty. (Remember that

    asked on June 22, 2013
  24. math

    a hot-air balloon is seen in the sky simultaneously by two observers standing a t two different points on the ground. (the 2 people are facing each other and the balloon is in between them in the air.)they are 1.75 miles apart on level ground. The angles

    asked on March 28, 2011
  25. English

    White House pets become almost as well known as their owners, what type o verb is become?

    asked on November 11, 2015
  26. chemistry

    In the red cabbage lab, we just took the cabbage juice and in 5 separate cups mixed it with 5 different liquids, ex: coke, milk, cleaning agent, etc, and matched the color to a ph chart to tell if it was a base or an acid. Simple lab. The question needs a

    asked on March 5, 2016
  27. geometry help!! answer all questions!! please

    1) Write the translation that maps P(-4, 2) onto the point P ' (-1, -1)? 2) What are the coordinates of the reflection of the point (5,1) over the line y = x? 3) The coordinate notation for reflection over the y-axis is -?-. 4) If a translation has a

    asked on July 31, 2014
  28. math

    On the blueprints of Adam's office building, the length of his rectangular office space is 5 1/4 inches. If the actual length of Adam's office space is 10 1/2 feet, what is the scale of the blueprint?

    asked on December 14, 2016
  29. Chemistry

    A sample consisting of 22.7 g of a nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.0 cm, and a piston is carefully placed on the surface of the compound so that, for all practical purposes, the distance between the

    asked on January 5, 2009
  30. chemistry

    2KClO3-2KCl+3O2 If this reaction produced 35.2 g of KCl, how much O2 was produced (in grams)?

    asked on February 25, 2015
  31. chemistry

    Explain how understanding of the atomic emmission spectrum led to developement of the atomic theory. The emmissions spectrum for each element is unique. You can identify an eleement by its spectrum. The atomic theory states that all atoms of a given

    asked on October 15, 2016
  32. English

    Teddy Roosevelt kept a pet snake. What type of noun is snake.

    asked on November 11, 2015
  33. chemistry please help!!!!!!!!!!!!!!!!!!!!!!

    How many molecules of hydrogen are produced if 13.05 g of Zn reacts with excess hydrochloric acid equation Zn plus HCL equals ZnCl2 plus H2?

    asked on May 31, 2010
  34. Life orientation

    How they influence effective communication attitudes and values?

    asked on February 26, 2019
  35. W. History

    I know what the domino threty is. Question is, What 3 aspects of foreign policy do we see the domino theory reflected? I assume they are talking from 60's to 70's. I don't like to submit w/o an answer, but if someone could help, I'd be extremely

    asked on May 18, 2016
  36. math

    a dog is tied to a leash that is hooked to the outside corner of a barn that measures 12 x 20 feet. the length of the leash is 16 feet. what is the maximum are in which the dog can wander?

    asked on January 10, 2011
  37. CHEMISTRY- vapour pressure

    Bromobenzene, C6H5Br, and chlorobenzene, C6H5Cl, form essentially ideal solutions in all proportions. At 100°C, the equilibrium vapour pressure of bromobenzene is 137mmHg and that of chlorobenzene is 285mmHg. Calculate the equilibrium vapour pressure

    asked on October 9, 2010
  38. Physics

    A cannonball is fired with initial speed v0 at an angle 30° above the horizontal from a height of 36.0 m above the ground. The projectile strikes the ground with a speed of 1.3v0. Find v0. (Ignore any effects due to air resistance.) HELP NEEDED!!!

    asked on September 12, 2012
  39. chemistry

    Calculate the energy needed to produce 10 moles of Cl2O7 using this balanced equation. 2Cl +70+ 100kCal==2ClO7 please explain steps if I needed to calculate for 7 moles, how would it change?

    asked on April 16, 2016
  40. Science

    What is anything that has mass and takes up space? 1) Weight 2) Volume 3) Density 4) Matter When you measure the boiling point of mercury, you are investigating a ____. 1) Chemical change 2) Chemical property 3) Physical change 4) Physical property Ab

    asked on April 6, 2016
  41. english grammar

    I am very sorry. What does the adverb very modify

    asked on December 8, 2015
  42. math

    Suppose you want to build a rectangular sandbox where the width is 5 feet less than the length and the diagonal is 5 feet longer than the length. What are the dimensions of the sandbox?

    asked on April 3, 2019
  43. Math

    There a rectangle fence the area is 635.4 square ft the width is 18ft what is the length of the fence

    asked on February 18, 2015
  44. Math

    you draw five card from a standard deck of 52 cards p(heart)=4/5. what type of probability is illustrated and why?? 1) Theroretical ; the result is based on then number of possible outcomes 2) Theroretical; the result is found by repeating an experiment

    asked on May 11, 2017
  45. chemistry

    What particle is needed to complete this equation 14/7N+ _______=14/7C+ 1/1H I think it is a beta particle because of beta decay and transmutation. I could be really off because this chapter is really confusing me.

    asked on May 30, 2016
  46. physics

    a drum holds 90 kg of water or 60 kg of gasoline. determine (a) the relative density of gasoline (b) the density of gasoline (c) the capacity of drum.

    asked on November 16, 2017
  47. Chemistry

    One more, confused How can you tell by the periodic chart which ions of metals are most easily reduced or oxidized. A website or video would be fine. I know it is quite involved. thanks again

    asked on April 29, 2016
  48. chemistry

    what chemical changes are responsible for the color changes in the red cabbage lab?

    asked on March 4, 2016
  49. chemistry

    In a titration, 3.4 g of an acid (HX) requires 21.5 mL of 0.85 M NaOH(aq) for complete reaction. What is the molar mass of the acid? Answer in units of g/mol. im not really sure how to even start... but i calculated the moles of NaOH which i got to be .018

    asked on October 24, 2010
  50. Chemistry

    Explain the chemical changes that occur in the red cabbage lab that changes the color of the cabbage juice. I know it has something to do with the hydrogen ions and maybe something to do with the electrons, but I don't understand what or how to answer this

    asked on March 4, 2016
  51. math

    on my worksheet "books never written" AND i have to do multiplication by 2 digit factor and i need help solving the names of the authors please don't tell me This makes no sense to me. also, you need a middle school worksheet that says MIDDLE SCHOOL MATH

    asked on October 28, 2009
  52. Urgent Chemistry!!

    I have done everything to solve this problem and I can't get the right answer (153.8J/degrees C). Ammonium nitrate, a component of fertilizer, decomposes: NH4NO3(s) > N2O(g) + 2H2) (g) the delta H=-36.0kJ/mol. 7.65g of ammonium nitrate was allowed to

    asked on November 20, 2008
  53. chemistry

    Ould you please offer me some insight to this, Calculate the hydrogen ion concentration (H+) for the aqueous solution in which (OH-) is1×10-15 mol/L. Is this solution acidic, basic or neutral? Thanks in advance

    asked on March 20, 2016
  54. CHEMISTRY- answer check

    A 0.386g sample of a protein was dissolved in water and made up to a volume of 60mL at 21.0°C. At this temperature the osmotic pressure of this solution was 1.24mmHg. Calculate the molecular mass of the protein 12682 g mol-1 95025 g mol-1 9627613 g mol-1

    asked on October 9, 2010
  55. chemistry

    Is this balanced properly 2H2O2----> 2H2O +O2 Thank you for the reactions of zinc and acetic acid. REAL QUESTION, if I was to rub all the copper off of a new penny down to the zinc, what would be the appearance of the zinc if I left it in vinegar (acetic

    asked on November 13, 2016
  56. physics

    An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic waves that travel 1530 m/s in seawater. How deep in meters is the water directly below the vessel if the time delay of the echo to the ocean floor and back is 6.8 s?

    asked on September 11, 2013
  57. Calculus

    Find the scalar equation of the plane through the points M(1,2,3) and N(3,2,-1) that is perpendicular to the plane with equation 3x + 2y + 6z +1 = 0. I know that normal of the latter equation is (3,2,6) but now what do I do? Thanks.

    asked on July 7, 2008

    the osmotic pressure of blood at 37 degrees is 7.56atm. what mass of glucose should be dissolved per litre of solution for an intravenous injection to be isotonic with blood?

    asked on October 13, 2010
  59. Chemistry

    What is the maximum amount of KCl that can disolve in 500 g of warer? The solubility of KCl is 34g/100 g H2O at 20 degrees C.

    asked on March 19, 2016
  60. chemistry

    Back to the atomic emmission spectrum and the atomic theory. in the 1900s, scientists observed that when a gaseous element, such as hydrogen was subjected to an electric discarge that the atoms emitted electromagnetic radiation. The light emmitted could be

    asked on October 15, 2016
  61. English

    Whe Abe Lincoln was president, he had a turkey. what type of pronoun is he?

    asked on November 11, 2015
  62. chemistry

    which system is under higher pressure, a column of mercury or a column of water

    asked on April 7, 2011
  63. chemistry

    What mass of Na2SO4 is needed to make 8.5L of 4.0M solution? Is the answer 7480 grams?

    asked on March 20, 2016
  64. 3rd grade Math

    California has more national parks than many other states. The sum of the two digits in its number of parks is 6. Both digits are even. If California has fewer than 30 national parks, how many does it have?

    asked on October 2, 2012
  65. math

    a hot-air balloon is seen in the sky simultaneously by two observers standing a t two different points on the ground. (the 2 people are facing each other and the balloon is in between them in the air.)they are 1.75 miles apart on level ground. The angles

    asked on March 28, 2011
  66. chemistry

    If I have a sample from doing a half lfe lab with m&ms, not timed, just pulling out decayed or m&ms with rhe m on top, how do I calculate the half life using t1/2=(.693)/k formula. Do I have to do this 9 times as it took 9 trys to use up all the m&ms. I am

    asked on May 29, 2016
  67. chemistry

    You need to prepare 500.00 mL of a 0.15 M solution of nitric acid . Concentrated nitric acid comes from the chemical copmanies as a 15.8 M liquid. How much (in mL) of this 15.8 M solution will you need to dilute to 500.00 mL to get the desired 0.15 M

    asked on October 10, 2010
  68. Chemistry!!

    How do I go about doing this question? How much heat energy is involved when 5.58g of Fe metal reacts with excess oxygen to produce Fe2O3? Do you need the equation, and if so, what would tha be? Fe + O2 > Fe2O3? I don't think that is right though. And

    asked on November 22, 2008
  69. chem

    What is the role of energy in physical changes? Thank you.

    asked on November 8, 2006
  70. Math

    what is the smallest number that 54 can be multiplied by to give a perfect square?

    asked on September 15, 2016
  71. AP 1 Physics

    A motorcycle has a constant speed of 25.0 m/s as it passes over the top of a hill whose radius of curvature is 144 m. The mass of the motorcycle and driver is 326 kg. Find the magnitudes of the following. Centripetal force: mv^2/r = 1414.93 N Normal force:

    asked on November 3, 2015
  72. algebra/ word problem

    Justin paddles his kayak 6 miles upstream in 1,5 hours. he turns around and paddles downstream, the same distance, in only 1 hour. What is the rate in still water and what is the rate of the water's current

    asked on January 9, 2013
  73. Biology

    why do certain cells contain more of certain structures than do others

    asked on September 16, 2012
  74. Geography

    The people of Africa vary greatly across the continent. Thousands of different ethnic groups occupy this vast continent. In two or three well-developed paragraphs, suggest two ways in which ethnic groups can differ from one another besides language. Use

    asked on February 10, 2011
  75. physics

    a book weighs 6 n. when held at rest above your head the net force on the book is?

    asked on January 21, 2009
  76. possessive nouns

    Write the noun in this sentence so it shows possession. The bus driver is named Mr. Ed. Would it be? The bus's driver is named Mr. Ed. I personally think the sentence should be rewritten to read, The bus driver's name is Mr. Ed The second sentence is

    asked on December 12, 2006
  77. physics

    a 5.67g quarter sits on a record player a distance of 5cm from the axis of rotation. if the angular speed of the record player is 33 revolutions per minute, what should the coefficient of friction be to keep it from sliding?

    asked on April 27, 2018
  78. algera

    A cash register contains only ten dollar and fifty dollar bills. It contains three times as many ten dollar bills as fifty dollar bills and the total amount of money in the cash register is $2,080. How many ten dollar bills are in the cash register?

    asked on September 11, 2016
  79. ELA

    in the poem "road not taken" what has worn the roads about the same?

    asked on March 21, 2015

    what is the main biomolecule in potatoes? what is the primary function for the potato plant?

    asked on December 18, 2010
  81. math or chemistry

    5.4 x10^-2 by 2.5 x10^-3 by 7.9 x10^-3m volume = 106.65 x10-8m^3 Check pls yesterday you said 106.65 x10^-6. If you add 2+3+3 you get 8 is that right? Just want to make sure I'm doing it right. Thank you. I may have witten it differently.

    asked on September 10, 2016

    An electron gun is a device that sets up an electric field between two plates. The electrons start on the negative plate and thenare accelerated toward the positive plate and out a small hole in its middle if an electron in the gun feels the effect of

    asked on December 20, 2012

    the osmotic pressure of blood at 37 degrees is 7.56atm. what mass of glucose should be dissolved per litre of solution for an intravenous injection to be isotonic with blood?

    asked on October 13, 2010
  84. Introduction Enngineering

    For what reason did the French Academy of Science create the metric system

    asked on November 3, 2009
  85. algebra

    Could you please help? What are the solutions of the compound inequality? 2x - 2 < - 12 or 2x+3 > 7 Is this one x < - 5 or x> 2 2x -1/3 +3 = 6. This one is 2x-1 divided by 3 plus 3 is less than or equal to - 4 or 8x -2 divided by 2 minus one is greater or

    asked on January 2, 2017
  86. Math

    I don't know how to do my homework I'm in 4th grade and in Manchester gate in m's snyders class help me ppplllzzzz Its 2016

    asked on December 14, 2016
  87. Masth

    How many letters are there in the correct answer for this question? a. One b. Two c. Three d. Four e Five

    asked on November 8, 2016
  88. US History

    Could you pls check this time line 1, king George issues Proclamation of 1763 2, stamp act 3. Sons of Liberty 4. Boston Massacre 5. Boston Tea Party 6, coersive acts 7, 1st continental congress 8. 2nd continental congree 9. First sho of American revolution

    asked on September 24, 2016
  89. chemistry

    What is the equilibrium constant for 2A + 3B (double arrow) =4C Is it (C)^c/ (A)^a (B)^b

    asked on April 17, 2016
  90. nutrition

    Created a nutritional care plan for the client. Included an evaluation of nutritional risk, listing of interventions, and expected outcomes. Listed the goals of medical nutrition therapy for the patient and suggested an appropriate diet. Identified whether

    asked on May 14, 2015
  91. statistics

    Your muffler factory claims to manufacture mufflers with a lifespan of more than 10000 miles of usage. A consumer group tests this claim at the 95 percent significance level, and finds that a sample of 64 mufflers have a mean lifespan of 10002 miles, with

    asked on August 23, 2014
  92. physics

    i walked from four miles in the direction of 30 celisus south of east, then from there i walked 3 miles to west. from there i walked 5 miles directly toward north. hw far away am i from home?' A: USE PARALLEO=LOGRAM GRAPHING METHOD. B: USE CALCULATION

    asked on January 30, 2012
  93. English

    Hello! I don't want to ask for help with my homework, aI have some more serious problem.... next year I will go to collage, i will graduate in May. I really want to study law in Vienna, but I only found Uni Wien....does somebody know any other university,

    asked on October 28, 2009
  94. English

    Hi! Can somebody help me? I'm an austrian student, and i have a big problem! We have to write a definition essay with the title : tourism/ travel. and we have to write it until tomorrow, but i'm very busy, i have a mathe test tomorrow too, and i am not

    asked on September 22, 2009
  95. Math

    What does 5 yards 2 feet 3 inches plus 2 yards 2 feet 9 inches equal?

    asked on January 4, 2017
  96. Math

    How many letters are there in the correct answer for this question? a. One b. Two c. Three d. Four e Five

    asked on November 8, 2016
  97. chemistry

    Element x Isotope 55x 60% Isotope 56x 30% Isotope. 57x 10% 55× 60 =3300 56×30=1650 57× 10= 570 Add them up5520 divide by 100 the atomic weight of x is 55.2 Pls check if this is correct , answer and method

    asked on October 14, 2016
  98. chemistry

    For the elements in row 2 of the PT discover the relationship between ionization and the family number of the element Element. Family. Ionization Ener Lithium. 1 13.6 beryllium. 2. 9.3 boron. 13. 8.3 carbon. 1 4. 11.27 nitrogen. 15 14.53 oxygen. 16. 13.62

    asked on October 13, 2016
  99. Chemistry

    When you mixand separate CaCO3 and SiO2 with acetic acid-vinegar, it is a chemical reaction. It bubbles and CO2 is produced. What property of CaCO3 causes this to happen? Could you explain this to me pls. I am guessing the acetic acid reacts with one of

    asked on September 21, 2016
  100. chemistry

    Sig figs 33.067. 5 sig figs .0908. 3sig figs 1099. 4 .0087. 2 check pls

    asked on September 10, 2016


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