Caitlin

Most popular questions and responses by Caitlin
  1. math

    Eight more than the product of two and a number x xxx.

    asked on May 3, 2018
  2. Chemistry

    You have to prepare a pH 3.50 buffer, and you have the following 0.10M solutions available HCOOH, CH3COOH, H3PO4,CHOONa, CH3COONa, and NaH2PO4. a) What solutions would you use? b) How many milliliters of each solution would you use to make approximately 1

    asked on April 21, 2015
  3. Chemistry

    A solution contains 2.2×10−4 M Ag+ and 1.3×10−3 M If NaI is added, will AgI(Ksp=8.3×10−17) or PbI2(Ksp=7.9×10−9) precipitate first? I know the answer to this is AgI Specify the concentration of I− needed to begin precipitation.

    asked on December 3, 2017
  4. Chemistry

    Which of the subshells in the electron configuration of Hf behave as core orbitals Check all that apply 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d

    asked on October 4, 2011
  5. Chemistry

    What do we call the part of the universe that is not part of the system

    asked on October 4, 2011
  6. Chemistry

    A line in the Balmer series of hydrogen has a wavelength of 486 nm. From what state did the electron originate? In what region of the electromagnetic spectrum is this line observed?

    asked on October 21, 2015
  7. Math

    Check my answers please? There are only 10 The figure below shows a triangle with vertices A and B on a circle and vertex C outside it. Side AC is tangent to the circle. Side BC is a secant intersecting the circle at point X: The figure shows a circle with

    asked on May 22, 2016
  8. Pre-Calculus

    A rectangular window is topped with a semicircle. The height of the rectangular part is 1 more than 3 times its width, w meters. Which function represents the total area, A, of the window in terms of the width?

    asked on September 10, 2015
  9. Chemistry

    Rank the carbon-carbon bonds in order of decreasing bond length. Rank carbon-carbon bonds from highest bond length to lowest. To rank bonds as equivalent, overlap them. 1,2,3

    asked on October 11, 2011
  10. Chemistry

    What is the frequency of radiation that has a wavelength of 13 \mu m, about the size of a bacterium?

    asked on September 22, 2011
  11. Physics

    a)What frequency is received by a person watching an oncoming ambulance moving at 120 km/h and emitting a steady 700 Hz sound from its siren? The speed of sound on this day is 345 m/s. b)What frequency does she receive after the ambulance has passed?

    asked on September 3, 2013
  12. Chemistry

    Formic acid, HCO2H, is a weak acid. Write a net ionic equation for the reaction of formic acid and aqueous potassium hydroxide.

    asked on October 14, 2009
  13. Chemistry

    A meteorological balloon had a radius of 1.1 m when released at sea level at 20◦C. It ex- panded to a radius of 5 m when it had risen to its maximum altitude, where the temperature was −20◦C. What was the pressure inside the balloon at that altitude?

    asked on November 20, 2012
  14. Math

    Find two mixed numbers so that the sum is 7 2/4 and the difference is 5

    asked on March 10, 2016
  15. Chemistry

    The dipole moment (mu) of HBr (a polar covalent molecule) is 0.851 D (debye), and its percent ionic character is 12.6 %. Estimate the bond length of the H-Br bond in picometers.

    asked on October 7, 2011
  16. science

    Water is useful for reducing friction between objects. However you also learned that (due to friction) moving water causes rough rocks to become smooth. How can this be?

    asked on November 3, 2015
  17. chemistry

    to clean a clogged drain, 26 g of sodium hydroxide is added to water to make 150 ml of solution what are the pH and pOH values for the solution?

    asked on April 18, 2010
  18. Quantitative Math

    A bacteria has a doubling period of 5 days. If there are 3250 bacteria present now, how many will there be in 40 days? I've found the growth rate to be 0.14869, but I can not find the amount of bacteria.

    asked on November 1, 2015
  19. Chemistry

    Calculate the heat (in kJ) required to change 40.0g of ice at -30.0 deg C to steam at 150.0 deg C?

    asked on March 6, 2012
  20. Chemistry

    If 0.370 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

    asked on December 3, 2017
  21. Chemistry

    What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.7×10^{15} Hz?

    asked on September 27, 2011
  22. Math

    A rectangle's width is x and its length is 2x-1. Its area is 21. Find its dimensions. my work so far: 21 = x(2x +1) 21 = 2x^2 + x I was wondering how I would continue to solces this problem.

    asked on December 18, 2016
  23. Chemistry

    Oxygen can be produced in the laboratory by the reaction 2 KClO3(s) → 2 KCl(s) + 3 O2(g) . How much potassium chlorate is needed to produce 2.75 L of oxygen, collected over water at 37◦C and 94.9 kPa? The vapor pressure of water at 37◦C is 6.28 kPa.

    asked on November 20, 2012
  24. chem really need help!

    If a solution containing 33.82 g of mercury(II) acetate is allowed to react completely with a solution containing 9.718 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after the

    asked on January 17, 2013
  25. Chemistry

    How much heat in kJ is lost when 100.0g of steam at 200 deg C is cooled down until it forms ice at -30.0 deg C?

    asked on March 6, 2012
  26. Finance

    The Isberg Company just paid a dividend of $0.75 per share, and that dividend is expected to grow at a constant rate of 5.50% per year in the future. The company's beta is 1.25, the market risk premium is 5.00%, and the risk-free rate is 4.00%. What is the

    asked on April 2, 2012
  27. General chemistry

    How much energy is released by the combustion of 1.00 mol of octane, C8H18?

    asked on November 7, 2011
  28. Chemistry

    Predict the formal bond angles about the central atom for the following molecules: TeBr4 Express your answers using three significant figures separated by a comma. What are the bond angles for an octahedral structure and how many?

    asked on October 28, 2011
  29. Marketing2

    What type of channel conflict is likely to be caused by dual distribution, and what type of conflict can be reduced by direct distribution? Why? Channel conflicts: VERTICAL- occurs between different levels in a marketing channel; for example, between a

    asked on July 29, 2008
  30. Chemistry

    The bond in O2 is shorter than the O-O bond in compounds that contain an O-O single bond. Explain this observation.

    asked on October 7, 2011
  31. grammar

    What is the correct sentence pattern for...I hereby declare Tuesday Shakespeare Day. OPTIONS: Question patternS-V-DOS-LV-PNS-VS-LV-PAS-V-IO-DOE-V-SS-V-DO-OC

    asked on August 22, 2012
  32. Physics

    A 2.0 mm diameter copper ball is charged to +42 nC. What fraction of its electrons have been removed? The density of copper is 8,920 kg/m3

    asked on October 1, 2013
  33. science

    A soccer ball is kicked with an initial speed of 8.4 m/s in a direction 22.0° above the horizontal.Find the magnitude and direction of its velocity at the following times. (Take the +x axis to be parallel to the ground, in the direction that the ball is

    asked on August 10, 2012
  34. College Algebra

    The height of a box is 3cm less than the width. The length is 2cm less than the width. The volume is 50cm^3. what is the width of the box?

    asked on April 2, 2012
  35. chem please help!

    If a solution containing 33.82 g of mercury(II) acetate is allowed to react completely with a solution containing 9.718 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after the

    asked on January 17, 2013
  36. Chemistry

    If a solution containing 33.82 g of mercury(II) acetate is allowed to react completely with a solution containing 9.718 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after the

    asked on January 17, 2013
  37. Marketing

    As a novice in global marketing, which alternative for global market-entry strategy would you be likely to start with? Why? What other alternatives do you have for a global market entry? (Marketing: The Core, 2nd ed.) It appears as though the choices from

    asked on July 29, 2008
  38. please help!!

    If a solution containing 33.82 g of mercury(II) acetate is allowed to react completely with a solution containing 9.718 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after the

    asked on January 17, 2013
  39. basic chem

    If a solution containing 33.82 g of mercury(II) acetate is allowed to react completely with a solution containing 9.718 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after the

    asked on January 17, 2013
  40. physics

    Two strings are adjusted to vibrate at exactly 224 Hz. Then the tension in one string is increased slightly. Afterward, three beats per second are heard when the strings vibrate at the same time. What is the new frequency of the string that was tightened?

    asked on August 7, 2012
  41. Science 10

    A person hits a 45-g golf ball. The ball comes down on a tree root and bounces straight up with an initial speed of 14.0 m/s. Determine the height the ball will rise after the bounce The equation is height= 1/2 velocity^2 / g where g is 9.8m/s^2

    asked on July 16, 2007
  42. math

    The number of customers that visit a local small business is 37,800 and has been continuously declining at a rate of 1.7% each year. What is the approximate number of customers that visit the business in 12 years?

    asked on July 28, 2013
  43. Science

    Zn + 2HCl - ZnCl2 + H2 Assuming the acid was in excess (so all of the zinc reacts), how many mols of hydrogen would you produce?

    asked on March 9, 2015
  44. Math

    A chain saw requires 7 hours of assembly and a wood chipper 3 hours. A maximum of 63 hours of assembly time is available. The profit of $190 on a chain saw and $220 on a chipper. How many of each should be assembled for maximum profit?

    asked on March 6, 2016
  45. college physics

    A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 140 cm and makes an angle of 130° with the positive x axis. The resultant displacement has a magnitude of 144 cm and is directed at an angle of 30.0°

    asked on September 28, 2010
  46. calculus

    The base of a solid consists of the region bounded by the parabola y=rootx, the line x=1 and the x-axis. Each cross section perpendicular to the base and the x-axis is a square. Find the volume of the solid.

    asked on June 6, 2012
  47. Calc

    The arc of the parabola y=x^2 from (1,1) to (2,4) is rotated about the y-axis. Find the area of the resulting surface.

    asked on June 6, 2012
  48. Chemistry

    The tomato is dropped. What is the velocity, v, of the tomato when it hits the ground? Assume 94.7% of the work done in Part A is transferred to kinetic energy, E, by the time the tomato hits the ground.

    asked on December 7, 2014
  49. Calculus

    Here is my problem that I am trying to work on: A rock is dropped from the top of a 300-ft cliff. It's velocity at time t seconds is v(t0= -32 t feet per second. a.) Find the height of the rock above the ground at time t. b.) How long will the rock take to

    asked on May 11, 2009
  50. Science

    If A tank with a flat bottom is filled with water to a height of four meters. what is the pressure at any point at the bottom of the tank? my teacher wants me to ignore atmospheric pressure when calculating my answer A. 3.5 kPa B. 3,500 kPa C. 34.3 kPa D.

    asked on May 7, 2013
  51. Chemistry

    A sample of oxygen is collected in a 387 mL container over water at 15◦C, and the barom- eter reads 738 torr. What volume would the dry gas occupy at 781 torr and 15◦C? Water’s partial pressure at 15◦C is 12.8 torr. Answer in units of mL

    asked on November 20, 2012
  52. physics

    (a) Calculate the mass flow rate (in grams per second) of blood (ρ = 1.0 g/cm3) in an aorta with a cross-sectional area of 2.0 cm2 if the flow speed is 33 cm/s. Answer is in g/s (b) Assume that the aorta branches to form a large number of capillaries with

    asked on October 27, 2011
  53. Physics

    A sample of an unknown material appears to weigh 275 N in air and 160 N when immersed in alcohol of specific gravity 0.700. What is the volume of the material? What is the density of the material?

    asked on October 28, 2013
  54. physics

    A car starts from rest and travels for 5.0 seconds with a uniform acceleration of +1.5 m/s^2. The driver then applies the brakes, causing a uniform acceleration of -2.0 m/s^2. If the brakes are applied for 3.0 seconds, how fast is the car going at the end

    asked on September 19, 2010
  55. Physics

    A golf club is swung with an average angular acceleration of 1.7 rad/s^2. If thee time from start of the swing until the club hits the ball is .7 s, what is the angular velocity of the club when it strikes the ball?

    asked on November 7, 2013
  56. Finance

    Scanlon Inc.'s CFO hired you as a consultant to help her estimate the cost of capital. You have been provided with the following data: rRF = 4.10%; RPM = 5.25%; and b = 1.15. Based on the CAPM approach, what is the cost of equity from retained earnings?

    asked on April 2, 2012
  57. Physics

    A person climbs from a Paris metro station to the street level by walking up a stalled escalator in 96.5 s. It takes 60.0 s to ride the same distance when standing on the escalator when it is operating normally. How long would it take for him to climb from

    asked on September 20, 2012
  58. Chemistry

    Calculate the average mass (in amu) of 1 methane molecule (to .01 amu)

    asked on November 1, 2011
  59. MATH-HELP ASAP

    Joline collects hockey cards. She needs 5 cards to complete a set. This is 20 percent of the set. How many cards are in the set? and how do you figure this out ? please help:(

    asked on June 15, 2010
  60. Chemistry

    Use van der Waals’ equation to calculate the pressure exerted by 2.33 mol of ammo- nia at −3.7◦C in a 1.25 L container. The van der Waals’ constants for ammonia are a = 4.00 L2·atm/mol2 and b = 0.0400 L/mol. (The values for a and b have been

    asked on November 20, 2012
  61. Intergrated Math

    Use the definitions and theorems of this section to evaluate and simplify the following expression. Be sure to express answers with positive exponents. (b ^4)^ 2

    asked on December 29, 2011
  62. dress making

    1. Which one of the following is the most complete and accurate definition of fiber? A. A stringy substance from plants B. The hair of an animal C. Man-made threads and yarns D. Basic raw material from which fabric is made 2. An example of a natural fiber

    asked on January 25, 2013
  63. physics

    A ball is thrown from a point 1.38 m above the ground. The initial velocity is 19.9 m/s at an angle of 33.8° above the horizontal. Find the maximum height of the ball above the ground. Calculate the speed of the ball at the highest point in the

    asked on September 23, 2012
  64. science

    Is vinegar a heterogeneous or homogeneous mixture?

    asked on September 17, 2008
  65. Introduction programing visual basic

    break even analysis. suppose a certain product sells for a dollars per unit. then the revenue from selling x units of the product is ax dollars if the cost of producting each unit of the product is b dollars and the company has overhead cost of c dollars

    asked on March 4, 2015
  66. physics

    A sample of an unknown material appears to weigh 285 N in air and 165 N when immersed in alcohol of specific gravity 0.700. (a) What is the volume of the material? Answer is in m3 (b) What is the density of the material? Answer is in kg/m3

    asked on October 27, 2011
  67. Chemistry

    Describe what a chemical bond is in terms of electron density between two atoms. What are the bond angles for an octahedral structure and how many? Predict the formal bond angles about the central atom for the following molecules: TeBr4 Express your

    asked on October 28, 2011
  68. Chemistry

    A monoprotic acid of 0.065 M concentration has a pH of 2. 75. Is this a strong or weak acid?

    asked on April 23, 2015
  69. Physics

    The asteroid belt circles the sun between the orbits of Mars and Jupiter. One asteroid has a period of 10 Earth years. a) What is the asteroid's orbital radius? b)What is the asteroid's orbital speed?

    asked on October 23, 2012
  70. Chemistry

    At 25 degrees Celsius, the base ionization constant for NH3 is 1.8 x ^-5. Determine the percentage ionization of a M solution of ammonia at 25 degree Celsius.

    asked on March 18, 2012
  71. Marketing3

    Develop a chart to highlight the role of each of the four main elements of the retailing mix across the four stages of the retail life cycle. Retail life cycle (see google images) Retailing mix: Bottom: Retail pricing, Store location, Retail communication,

    asked on July 29, 2008
  72. dress making

    im pretty sure im right on most the question, just wanna make sure before i submit!! help Mrs. Shotto was once one of your regular customers, but she hasn't asked to have any garments made in approximately one year. You note she has lost weight. She would

    asked on January 28, 2013
  73. Math 10

    A cylinder has a surface area of 250cm2. The height is twice as big as the radius. What is the height of the cylinder?

    asked on May 21, 2012
  74. math

    You are going to toss 2 pennies 20 times. Make a prediction. how many times do you think the 2 pennies will come up as: 2 heads: 2 tails: 1 head, 1 tail:

    asked on March 19, 2008
  75. mathematicas

    how do i do my homework quickly like a ninja but thoroughly??

    asked on March 14, 2011
  76. Life Science

    two organisms were found to have different genotypes but the same phenotype. Predict what these phenotypes might be? and Explain

    asked on November 17, 2010
  77. Physics

    Consider the diagram of the box and bucket. If the coefficient of static friction is 0.5 and the coefficient of kinetic friction is 0.3, find the maximum mass of the bucket in order for the system to be in static equilibrium. If the block was given a

    asked on January 1, 2011
  78. Math

    Please help me solve this.. It costs $10 plus $8 per hour to rent a canoe. Brandon and Erin have $50. Solve the following equation to find how many hours they can rent a canoe. 8h +10 = 50

    asked on November 3, 2010
  79. physics

    how do I calculate mass of one object in an elastic collision? I have the equation m1v1 initial + m2v2 initial = m1v1 final + m2v2 final How do I rearrange this to solve for m2?

    asked on June 15, 2010
  80. Calculus

    well i have this homework question that says: A rock is dropped from the top of a 300-ft cliff. It's velocity at time t seconds is v(t0= -32 t feet per second. a.) Find the height of the rock above the ground at time t. b.) How long will the rock take to

    asked on May 11, 2009
  81. Chemistry

    The heat lost or gained by a system is related to its temperature change by a property called its heat capacity. The molar heat capacity of metals at or above room temperature equals 24.92 J K-1mol-1. The temperature of a block of copper metal (molar mass

    asked on February 6, 2013
  82. Calc

    A closed box with a square base is to be constructed so that its volume is 324 cubed feet. The material for the top and bottom cost is $3 per square foot, and that for the sides $2 per square foot. Find the dimensions of the box so that the cost will be

    asked on June 5, 2012
  83. Chemistry

    What is the frequency of radiation that has a wavelength of 13 \mu m, about the size of a bacterium?

    asked on September 22, 2011
  84. alegerba

    In the expression 90+5z, the coefficient is

    asked on April 15, 2014
  85. Physics

    A particle's constant acceleration is north at 108 m/s2. At t = 0, its velocity vector is 61.7 m/s east. At what time will the magnitude of the velocity be 102 m/s?

    asked on September 20, 2012
  86. Physics

    A horizontal spring attached to a wall has a force constant of 780 N/m. A block of mass 1.70 kg is attached to the spring and oscillates freely on a horizontal, frictionless surface as in the figure below. The initial goal of this problem is to find the

    asked on September 27, 2011
  87. Math

    A ten-pin bowling ball has a volume of about 5274 cm3. A candlepin (8) bowling ball has a volume of about 48 in3. About how much greater is the volume of a ten-pin bowling ball than the volume of a candlepin bowling ball?

    asked on September 25, 2011
  88. Chemistry

    Use Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute nothing to the screening constant, S, calculate Zeff} for these two ions. Express your answers as integers. Enter your answers numerically separated by a

    asked on September 17, 2011
  89. American History

    This is what my teacher wrote up on the board today and i was needing some help with it i don't really understand it all... This is exactly what he wrote: In a page-long essay describe how we got Texas Include: Stephen Austin, Zachary Taylor, Manifest

    asked on April 14, 2011
  90. ela

    Below the main level, we have a large playroom. What part of speech is below?

    asked on September 26, 2010
  91. 4th grade math

    I don't know how to go about solving this problem: There were 93 students going to camp. After equal groups of fewer than 10 students were formed for hiking. 2 students were left over . How many equal groups were formed? Thanks!

    asked on January 7, 2010
  92. math

    what is 4/9 reduced???

    asked on July 8, 2008
  93. Introduction programing visual basic

    break even analysis. suppose a certain product sells for a dollars per unit. then the revenue from selling x units of the product is ax dollars if the cost of producting each unit of the product is b dollars and the company has overhead cost of c dollars

    asked on March 4, 2015
  94. Physics

    Calculate the force of gravitational attraction between two spheres of mass 10.1kg and 45.2 kg that are 38.5m apart.

    asked on November 7, 2013
  95. Physics

    Calculate the force of gravitational attraction between two spheres of mass 10.1kg and 45.2 kg that are 38.5m apart.

    asked on November 7, 2013
  96. science

    According to the principle of superposition, in a stack of undisturbed sedimentary rocks, the oldest rocks are _____. Gaps in rock layers are called ____. Which of the following is not a type of unconformity?

    asked on November 16, 2012
  97. algebra

    Which situation would most likely be represented by a negative correlation: hours of practice and your golf score, hours of practice and the number of baskets you make in basketball, or hours of practice and the cost of a computer? Hint: In golf, the lower

    asked on March 19, 2012
  98. chemistry

    300.0 g of ammonia react with 36.0 moles of sulfuric acid to produce ammonium sulfate. How many moles of excess sulfuric acid are left over after the reaction is complete?

    asked on March 16, 2011
  99. Physics

    A 66.0 kg base runner begins his slide into second base when moving at a speed of 4.4 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is

    asked on October 25, 2014
  100. Chemistry

    Explain why it is necessary to form a double bond in the Lewis structure.

    asked on October 7, 2011

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