Popular questions and responses by Jason
  1. Chem

    Plese tell me if these are right. A 15.0-mL sample of NaCl solution has a mass of 15.78g. After the NaCl is evaporated to dryness, the dry salt residue has a mass of 3.26g. Calculate the following concentrations for the NaCl solution. a. %(m/m)= 3.26 x 100

    asked on November 7, 2010

    How are presidential vetoes and congressional overrides related to partisan control of government?

    asked on February 4, 2018
  3. Math

    there are 9 blue marbles, 4 black marbles, 5 white marbles and 6 red marbles. If the probability of drawing a blue marble is now 1/3, how many of the 6 marbles removed were blue?

    asked on August 3, 2014
  4. english 11

    1. In persuasive writing, it is important to (1 point)anticipate and address counterarguments. clearly state your position. provide facts and examples to back up your position. practice all of the above. 2. “Redskin” was originally a term for (1

    asked on March 9, 2012
  5. Chemistry

    In aqueous solution, hypobromite ion, BrO-, reacts to produce bromate ion, BrO3 -, and bromide ion, Br-, according to the following chemical equation. 3BrO-(ag) → BrO3 -(ag)+2Br-(ag) A plot of 1/[BrO-] vs. time is linear and the slope is equal to 0.056

    asked on February 19, 2011
  6. Math

    If leah is 6 years older than sue, John is 5 years older than Leah and the total age is 41, how old is sue

    asked on August 4, 2020
  7. Chemistry

    Which of the following species is the strongest oxidizing agent under standard state conditions? a. Ag+(aq) b. H2(g) c. H+(aq) d. Cl2(g) e. Al3+(aq) I think Ag+(aq) will transfer electons sooner than the other four choices. BECAUSE: H2 will hold on it its

    asked on March 10, 2009
  8. Physics

    Two identical speakers, labeled Speaker 1 and Speaker 2, are playing a tone with a frequency of 175 Hz in phase. The centers of the speakers are located 6.00 m apart. Five observers are standing on a line that is 6.00 m in front of the speakers, as shown

    asked on November 2, 2019
  9. physics

    the angular speed of the hour hand of a clock is

    asked on December 1, 2016
  10. finance (firm's net income)

    If a firm has a break-even point of 20,000 units and the contribution margin on the sirm's single product is $3.00 per unit and fixed costs are $60,000, what will the firm's net income be at sales of 30,000 units? o.k. the break even amount will be 20,000

    asked on July 25, 2008
  11. math-test statistic

    If we have a sample of 12 drawn from a normal population, then we would use as our test statistic A) z0 with 11 degrees of freedom B) t0 with 12 degrees of freedom C) z0 with 12 degrees of freedom D) t0 with 11 degrees of freedom

    asked on December 5, 2009
  12. chemistry

    A 2.500×10−2M solution of NaCl in water is at 20.0∘C. The sample was created by dissolving a sample of NaCl in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed to do this was 999.3mL . The density of

    asked on May 24, 2015
  13. Math, Probability

    According to a survey of Australian households, the probability that annual household income is over $50,000 if the residents own 2 cars is 80%. Of the households surveyed, 60% had incomes over $50,000 and 70% had 2 cars. The probability that annual

    asked on September 14, 2018
  14. physics

    A diver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. He then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. The net external torque acting on the diver is zero. What is

    asked on November 1, 2011
  15. spanish

    Complete the sentence with the correct form of the verb in parentheses. ¿Qu¨¦ ___ (hacer) Uds. despu¨¦s del trabajo hoy?

    asked on August 17, 2016
  16. Algebra

    4 years ago my father's age was 4 times that of my age. At present the sum of my father's age and that of mine is 53 years . What is father's present age.

    asked on October 5, 2014
  17. math

    A rectangular school yard 280 m by 245 m is to be fenced. How many metres of fencing will be required to fence it completely?

    asked on July 5, 2012
  18. finance firm's sales on credit

    In general, the larger the portion of a firm's sales that are on credit, the: A. lower will be the firm's need to borrow B. higher will be the firm's need to borrow C. more rapidly credit sales will be paid off D. more the firm can buy raw materials on

    asked on July 25, 2008
  19. geometry

    A cylinder has a height of 16 cm and a radius of 5 cm. A cone has a height of 12 cm and a radius of 4 cm. If the cone is placed inside the cylinder as shown, what is the volume of the air space surrounding the cone inside the cylinder? (Use 3.14 as an

    asked on January 23, 2014
  20. Math-Statistics

    For a standard normal curve, find the z-score that separates the bottom 90% from the top 10%.

    asked on December 9, 2009
  21. finance (bonds to stock)

    corporations prefer bonds to preferred stock for financing their operations because? A. prefered stocks require a dividend B. bond interest rates change with the economy while stock dividends remain constant C. the after-tax cost of debt is less than the

    asked on July 25, 2008
  22. chem

    Hydrogen iodide can decompose into hydrogen and iodine gases. 2HI(g) mc026-1.jpg H2(g) + I2(g) K for the reaction is 0.016. If 0.148 atm of HI(g) is sealed in a flask, what is the pressure of each gas when equilibrium is established?

    asked on March 5, 2014
  23. Physics

    The femur of a human leg (mass 10 kg, length 0.9 m) is in traction, as shown in the figure below. The center of gravity of the leg is one-third of the distance from the pelvis to the bottom of the foot. Two objects, with masses m1 and m2, are hung using

    asked on July 15, 2013
  24. Interediate algebra

    if f varies jointly as q^2 and h, and if f = 72 when q = 3 and h = 4, find h when f = 48 and q = 2

    asked on April 7, 2012
  25. Math

    Clark's Country Pet Resort is fencing a new play area for dogs. The manager has purchased 186 yd of fence to enclose a rectangular pen. The area of the pen must be 2156 yds^2. What are the dimensions of the​ pen? Length is how many yards? Width is how

    asked on November 15, 2016
  26. Mechanics

    Typically, a tennis ball hit during a serve travels away at about 51 m/s. If the ball is at rest mid-air when struck, and it has a mass of 0.058 kg, what is the change in its momentum on leaving the racket? Show the solution and answer.

    asked on September 19, 2013
  27. chem

    K2CO3 is an excellent drying agent for some classes of organic compounds. would it be a better choice for an acid (RCO2H)or an amine(RNH2)? why? i know this is RNH2. could it be explained that potassium carbonate itself is basic so it will make water and a

    asked on October 28, 2008
  28. physics

    A typical cell membrane is 8.0 nm thick and has an electrical resistivity of 1.3 × 107Ω.m. (i) If the potential difference between the inner and outer surfaces of a cell membrane is 75 mV, how much current flows through a square area of membrane on a

    asked on October 15, 2014
  29. Physics

    A ball is rolled off a table that is 0.481 m above the floor. The ball is rolling with a velocity if 1.8 m/s as it goes off the edge of the table. At the exact instant the first ball rolls off the table a second ball is dropped from the same height. A.)

    asked on July 22, 2013
  30. Chemistry

    Which of the following species is the strongest oxidizing agent under standard state conditions? a. Ag+(aq) b. H2(g) c. H+(aq) d. Cl2(g) e. Al3+(aq) An oxidizing agent is a substance that gains electrons in a redox chemical reaction. I think Al3+ has a

    asked on March 10, 2009
  31. Chemistry

    Choose and best oxidizing agent and the best reducing agent: Ni2+, Al, H+, and I- ??? I'm so confused, please help! I know the oxidizing agent is being reduced and the reducing agent is getting oxidized. But how do I use the standard reduction potential

    asked on June 14, 2017
  32. physics

    What is the voltage across a capacitor after a time of two constants when a. charging from zero voltage and b. discharging from a fully charged condition?

    asked on October 29, 2013
  33. chemistry

    the heat of vaporization for water is 540 cal/g. how many kilocalories are needed to change 22g of liquid water to steam at 100*c?

    asked on June 18, 2013
  34. Chemistry

    175g of water was heated fro 15 to 88 degrees C. how many kilocalories were absorbed by the water? I got 94.5 kcal. Is this right?

    asked on September 18, 2010
  35. Algebra

    An engineer designs a satellite dish with a parabolic cross section. The dish is 14 ft wide at the​ opening, and the focus is placed 4 ft from the vertex. ​a) Position a coordinate system with the origin at the vertex and the​ x-axis on the​

    asked on November 16, 2016
  36. Chemistry

    What is the geometry of S2O82- its basically two SO4 molecules connected by the O-O bond

    asked on November 4, 2008
  37. physics

    The sun rotates around the center of the milky way galaxy at a distance of about 30,000 light years (1ly= 9.5*10^15m). if it takes about 200 million years to make one rotation, estimate the mass of our galaxy. Assume that the mass distribution of galaxy is

    asked on October 25, 2008
  38. physics

    Show that the magnitude of the charge on a capacitor is given by Q = (Qo(1-e^-(t/T))) and Q = Qoe^-(t/T) for charging and discharging, respectively.

    asked on October 29, 2013
  39. Chemistry

    If 5.300 g of C6H6 is burned and the heat produced from the burning is added to 5691 g of water at 21 °C, what is the final temperature of the water? 2C6H6(l) +15O2 (g)----> 12CO2(g)+6H2O(l) +6542

    asked on October 6, 2013
  40. Math

    Find the balance in the account. $2,500 principal earning 4%, compounded quarterly, after 4 years

    asked on July 8, 2012
  41. Chem

    A sample of 2-butanol has a specific rotation of 3.25. Determine the % ee and molecular composition of this sample. The sepcific rotation of pure (+)-2-butanol is +13.0. is it (3.25/13.0)x100%= 25%... i'm a little confused on the molecular composition

    asked on November 18, 2008
  42. finance (total asset turnover)

    Total asset turnover indicates the firm's? A. liquidity B. debt position C. ability to use its assets to generate sales D. profitability I read about a asset turnover ratio in the text book. this ratio by itself is useless but when compared to the company

    asked on July 26, 2008
  43. finance (risk premium)

    The risk premium is likely to be highest for A. U.S. government bonds B. corporate bonds C. gold mining expedition D. either B or C I like C the gold mining expedition I that correct??

    asked on July 25, 2008
  44. math

    Kara was interested in going to the mall to buy some new clothes. Once she got there she purchased two shirts that cost $13.42 total. If she started out with $40.00, what percentage of her money did she spend

    asked on February 28, 2018
  45. English

    Please, explain me what does it mean about this quote. “Our deepest fear is not that we are inadequate. Our deepest fear is that we are powerful beyond measure. It is our light, not our darkness that most frightens us. We ask ourselves, Who am I to be

    asked on September 9, 2015

    All of the following statements about the Declaration of Independence are TRUE except:

    asked on February 11, 2015
  47. Algebra

    Teri finds a pile of money with at least $600. If she puts $200 of the pile in her left pocket, gives away 4/5 of the rest of the pile, and then puts the rest in her right pocket, she'll have more money than if she instead gave away $600 of the original

    asked on February 7, 2015
  48. physics (clear answer)

    An airplane traveling north at 400 m/s is accelerated due east at a rate of 50 m/s2 for 6 s. If the effects of air resistance and gravity are ignored, what is the final speed of the plane?

    asked on February 5, 2014
  49. physics (this one is killing me clear answer)

    At time t = 0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0° above the +x axis. As the puck slides, a constant acceleration acts on it that has the following components: ax = –0.360 m/s2 and ay = –0.980 m/s2. What is the

    asked on February 4, 2014
  50. Chemistry

    The normal melting point of H2O is 273.15 K, and deltaH fusion is 6010 J/mol. Calculate the change in the normal melting point at 175 and 625 bar assuming that the density of the liquid and solid phases remains constant at 997 and 917 kg/m^3 respectively.

    asked on March 29, 2012
  51. trig

    if the terminal ray of an angle 0 in standard position passes through the point (-1,3),then cos0=

    asked on December 5, 2011
  52. calculus

    26. A train is heading due west from St. Louis. At noon, a plane flying horizontally due north at a fixed altitude of 4 miles passes directly over the train. When the train has traveled another mile, it is going 80 mph, and the plane has traveled another 5

    asked on March 16, 2009
  53. chemistry

    In the following half equation, which is the oxidizing agent? NO3–(aq) + 4H+(aq) + 3e– NO(g) + 2H2O a. NO3– b. H+ c. e– d. NO e. H2O An oxidizing agent is a chemical compound that readily transfers oxygen atoms, or is a substance that gains

    asked on March 10, 2009
  54. Chem

    What is the original molarity of a solution of ammonia whose pH is 11.11 okay i tried to convert to pOH- so i got 2.89 and then to [OH]=1.288e-3 and then solve using Kb=1.8e-5 whats going wrong???

    asked on February 14, 2009
  55. finance 3 questions

    Some analysts believe that the term structure of interest rates is determined by the behavior of various types of financial institutions. This theory is called the A. ANSWER Expectations hypothesis B. Segmentation theory C. Liquidity premium theory D.

    asked on July 25, 2008
  56. Physics

    What is the Reynolds number for blood leaving the heart through the aorta if the diameter of the aorta is 2.15 cm, and the blood has a dynamic viscosity of 2.70×10−3 Pa · s, a density of 1050 kg/m3, and travels at a mean fluid velocity of 31.7 cm/s?

    asked on November 17, 2019
  57. i need help with science pls

    Which of the following types of stars started out on the main sequence with the largest initial mass? In Graph A, the curve peaks at 800 nm, in the red section of the visible light spectrum. In Graph B, the curve peaks at 550 nm, in the green section of

    asked on February 10, 2016
  58. Math

    If $ 2500 is invested in an account that pays interest compounded continuously, how long will it take to grow to $ 5000 at 3%? Round to the nearest tenth

    asked on June 8, 2011
  59. chemistry

    Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide: NH4I(s) ↔ NH3(g) + HI(g) At 400ºC, Kp = 0.215. If 150 g of ammonium iodide is placed into a 3.00-L vessel and heated to 400ºC, calculate the partial pressure of ammonia when

    asked on March 22, 2011
  60. Chem

    Can you please tell me if these are right? Classify the solutes in the following equations as a weak electrolyte, a strong electrolyte of a non electrolyte in water. a. XY2(s)=X2+(aq) +2Y-(aq) b. HX(g) ß=H+(aq) + X-(aq) c. XYZ(s)=XYZ(aq) d. YOH(s)=Y+(aq)

    asked on November 14, 2010
  61. Chemistry

    Can you tell me if these are right please? When 2.50g of copper reacts with oxygen the copper oxide product has a mass of 2.81g. What is the simplest formula of the copper oxide. I got Cu2O (copper (I) oxide). Aluminum and oxygen gas react to produce

    asked on October 19, 2010
  62. finance

    An increasing average collection period indicates 1)the firm is generating more income. 2) accounts receivable are going down. 3) the company is becoming more efficient in its collection policy. 4) the company is becoming less efficient in its collection

    asked on March 2, 2009
  63. chem

    The Rf value of compound A is .34 when the TLC plate is developed in hexane and .44 when the plate is developed in diethyl ether. Compound B has an Rf value of .42 in hexane and .60 in diethyl ether. Which solvent would be better for seperating a mixture

    asked on October 21, 2008
  64. finance (assumptions)

    The cost of capital for common stock is ke=(D1/Po)+g. What are the assumptions of the model? A. growth (g) is constant to infinity B. the price earnings ration stays the same C. the firm must pay a dividend to use this model D. all of the above are

    asked on July 26, 2008
  65. finance (sales on credit)

    In general, the larger the portion of a firm's sales that are on credit, the ... A. lower will be the form's need to borrow B. higher will be the firm's need to borrow C. more rapidly credit sales will be paid off D. more the firm can buy raw materials on

    asked on July 26, 2008
  66. finance 2 questions

    9. When Patricia sells her General Motors common stock at the same time that Brian purchases the same amount of General Motor's stock, General Motors receives: A. The spread between the bid and ask of the transaction B. The dollar amount of the

    asked on July 25, 2008
  67. Math

    Kevin has an equal number of quarters nickels and dimes in his piggy bank, he randomly picks a coin replaces it and picks another coin. What is the probability that the sum of the two coins picked is at least thirty cents

    asked on August 29, 2016
  68. chemistry

    A 2.500×10−2M solution of NaCl in water is at 20.0∘C. The sample was created by dissolving a sample of NaCl in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed to do this was 999.3mL . The density of

    asked on May 24, 2015
  69. physics

    A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a mass-spring system, greatly increasing efficiency. Normally, the jellyfish emits one

    asked on November 29, 2014
  70. chemistry

    how much heat is needed to convert 30 g of water at 10 C to 110 C

    asked on May 3, 2012
  71. Phys

    What is the speed of a wave whose frequency is 9.00Hz and wavelength is 0.654 m?

    asked on April 12, 2012
  72. Physics

    Comic-strip hero Superman meets an asteroid in outer space, and hurls it at 750 m/s, as fast as a bullet. The asteroid is three thousand times more massive than Superman. In the strip, Superman is seen at rest after the throw. Taking physics into account,

    asked on February 15, 2012
  73. Physics

    When spiking a volleyball, a player changes the velocity of the ball from 4.5 m/s to -20 m/s along a certain direction. If the impulse delivered to the ball by the player is -9.7 kg * m/s, what is the mass of the volleyball?

    asked on March 29, 2011
  74. Chem

    Calculate the percent yield of eugenol obtained considering the fact that clove oil is approximately 16-19 % clove by weight of cloves. isolated eugenol=061g purity of eugenol in clove oil=99.6% (based on clove oil gas chromatograph) Estimate the % yeild

    asked on November 28, 2010
  75. Physics

    An iron bolt of mass 70.0 g hangs from a string 31.3 cm long. The top end of the string is fixed. Without touching it, a magnet attracts the bolt so that it remains stationary, displaced horizontally 23.0 cm to the right from the previously vertical line

    asked on January 18, 2010
  76. chem

    why do we add boiling chips or boiling stones before the distillation starts? Boiling chips should never be added to a hot solution!Why? i don't know what the answer is to the first one, but as for the second i think i have a clue. is it that the boiling

    asked on November 2, 2008
  77. chem

    when two layers form during an ether/water extraction, what would be an easy, convenient way to tell which layer is which if the densities were not available?

    asked on October 14, 2008
  78. math

    The butcher shop sells a 3 lb package of chicken legs for $9.57. The supermarket sells chicken legs for $7.68/ kg. Determine the price per kilogram that each store charges. Which store has the lower price per kilogram?

    asked on May 24, 2020
  79. AP Chemistry

    A 5 gram sample of a gaseous substance occupies 10 L at 48◦C and 697 torr. What is the density of the gas under these conditions? Answer in units of g/L I first started converting the temperature to Kelvin, and the pressure to ATM. I then re-arranged the

    asked on November 13, 2017
  80. Math pls help me pls pls

    If the outliers are not included, what is the mean of the data set? 72, 82, 3, 55, 62, 73, 90, 80, 151, 59, 46, 31 59 65 67 73 is it b

    asked on February 10, 2016
  81. Physic

    The figure below shows a block of mass m resting on a 20¡ã slope. The block has coefficients of friction ¦Ìs = 0.73 and ¦Ìk = 0.53 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass

    asked on March 3, 2014
  82. Physics 221

    An electron is accelerated by a uniform electric field (1000 V/m) pointing vertically upward. Use energy methods to get the magnitude and direction of its velocity after it moves 0.10 cm form rest. Does the electron gain or lose potential energy?

    asked on December 31, 2013
  83. physics

    Show that the time for the voltage in the RC circuit to rise to (Vo/2) "half-max" is t1/2 = T ln 2

    asked on October 29, 2013
  84. Algebra 1

    A rectangle has a length of 4x and a width of 4x-2. its perimeter is 12 inches find the length and width

    asked on September 30, 2013
  85. Mechanics

    a driver of a 1200-kg car notices that the car slows from 20 m/s to 15 m/s as it coasts a distance of 130 m along level ground. How large a force opposes the motion? Show the solution

    asked on September 14, 2013
  86. physics

    Wind gusts create ripples on the ocean that have a wavelength of 5.00 cm and propagate at 2.00 m/s. What is their frequency?

    asked on November 13, 2012
  87. Physics calculus based

    Consider the Sun to be at the origin of an xy-coordinate system. A telescope spots an asteroid in the xy-plane at a position given by (x, y) with a velocity given by (vx, vy). [DATA: (x, y) = (3.3, 5.2) ×10^11 m; (vx, vy) = (-6.1, -4.0) ×10^3 m/s.] (A)

    asked on June 19, 2012
  88. Science

    Organisms that maintain a constant body temperature rely on the heat produced by cells. Where does this heat come from? A) Special metabolic pathways exist just for the production of heat. B) Mitochondria produce heat in the form of ATP. C) Plants store up

    asked on October 26, 2011
  89. Physics #2

    A car can decelerate at -3.40 m/s2 without skidding when coming to rest on a level road. What would be the magnitude of its deceleration if the road were inclined at 14° uphill? Assume the same static friction coefficient.

    asked on October 11, 2010
  90. Chemistry, Solutions

    Two or more combined substances that do not react form a _________. solution mixture substance compound

    asked on September 16, 2010
  91. Chemistry

    Acids and bases react with one another to form compounds called ______? A. salts B. ions C. mixtures D. salts, ions, and mixtures

    asked on September 16, 2010
  92. physics

    A physics student sits by the open window on a train moving at 25 m/sec towards the east. Her boyfriend is standing on the station platform, sadly watching her leave. When the train is 150 meters form the station, it emits a whistle at a frequency of 3000

    asked on April 21, 2010
  93. chem

    A student carried out a simple distillastion on a compound known to boil at 124 C and reported an observed boiling point of 116-117 C. Gas chromatographic analysis of the product showed that the compound was pure, and a calibration of the thermometer

    asked on November 3, 2008
  94. finance (bonds vs. perferred stock)

    Corporations prefer bonds to preferred stock for financing their operations because A. preferred stocks require a dividend B. bond interest rates change with the economy while stock dividends remain constant C. the after-tax cost of debt is less than the

    asked on July 26, 2008
  95. finance (General Motors Stock)

    When Patricia sells her GM common stock at the same time that Brian purchases the same amount of GM stock, GM receives: A. the "spread" between the Bid and Ask of the transaction B. The dollar amount of the transaction, less brokerage fees. C. only the par

    asked on July 25, 2008
  96. chemistry-

    How do I construct an ICE table for this question. CH3COOH + NaOH --> CH3COONa + H2O Fill in the equilibrium line of the table. [Think about the initial pH and think about the pH at the end point of the titration. Initial pH 2.72 When the solution turned

    asked on May 9, 2007
  97. math

    3.Suppose C(x) = x^2 -10x+27 represents the costs, in hundreds, to produce x thousand pens. How many pens should be produced to minimize the cost? What is this minimum cost?

    asked on April 29, 2020
  98. Physics

    A guitar string of length 30 cm and stretched under a tension of 78 N has a certain fundamental frequency. How long would a pipe, open at both ends, need to be to play the same fundamental frequency? A 15-cm long piece of the guitar string has a mass of

    asked on November 2, 2019
  99. physics

    A race car is moving with a velocity of 144 kilometers/hour. The driver applies the brakes, and the car comes to a halt in 12.0 seconds. What is the average acceleration of the car during those 12.0 seconds?

    asked on October 30, 2018
  100. Science

    1. what is a single replacement reaction A. A reaction in which two or more substances react to form a single substance*** B. A reaction in which one element takes place the place of another element in a compound. C. A reaction in which a compound breaks

    asked on November 14, 2017


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