Newest questions and responses by J
  1. Chemistry

    1. How do your values of and compare with literature/theoretical values? What are possible sources of any discrepancy between the experimentally determined and theoretical values of ? (The aims of this experiment are: (1) To determine the thermodynamic

    asked on October 25, 2018
  2. Math

    Jerome has 1/4 of the groups video games at his house. Mario has 2/5 of the groups video games at his house. What fraction of video the groups video games is either at Jerome's house or Mario's house?

    asked on December 8, 2017
  3. chemistry

    determine the number of grams of Ne gas that must be added to a container in order for the volume to increase to 38.2 L at constant pressure and temperature if the container had an initial volume of 25.0 L and 2.0 moles of Ne

    asked on December 5, 2017
  4. Government

    6. Which criteria must a law meet in order to pass the government's strict scrutiny test to reasonably discriminate? 8. Which of the following actions would provide a citizen the most influence on government decision making?

    asked on November 20, 2017
  5. Us government

    19. How is Snyder v Phelps an example of competing rights? Be specific in your answer. The court case of Snyder v phelps is an example of competing rights because the rights of privacy and speech are making distress and this came into conflict with the

    asked on November 18, 2017
  6. physics

    A uniform metre rule of mass 90g is pivoted at the 40cm mark. If the rule is in equilibrium with an unknown mass m placed at the 10cm mark and a 72g mass at the 70cm mark,determine m.

    asked on November 11, 2017
  7. trig

    secx = 4 in Q2 find sin2x,cos2x,tan2x

    asked on October 30, 2017
  8. math

    A parking garage has floors above and below ground level. For a scavenger hunt, galas friends are given a list of objects they need to find on the third floor and fourth level below ground, the first and fourth above ground, and ground level. a. If ground

    asked on October 10, 2017
  9. Math

    A triangular lot is 120ft on one side and has a property line of 700ft. Find the area of the lot in acres (figure not drawn to scale)

    asked on September 28, 2017
  10. Math

    In Exercises 16–18, use the following information. At a college, 43% of the students are women, 15% of the students are art majors, 4% have not chosen a major, and 8% are women and art majors. A faculty member conducts an experiment and selects students

    asked on June 8, 2017
  11. biostatistics

    Rheumatoid arthritis (RA) is a chronic disease that affects synovial joints. About 1% of the world population suffers from this disease. A synovial test for the presence of the anti-citrullinated protein antibodies is commonly used when rheumatoid

    asked on May 24, 2017
  12. Chemistry

    I get that you're supposed to balance; however, I was confused on how to do the reduction and oxidation electron equations (the simplist way). Looked at too many examples online but nothing was clear. 1) Cu + HNO3 → Cu(NO3)2 + NO2 + H2O 2.) KMnO4 + H2SO4

    asked on May 17, 2017
  13. physical science

    Which description does the phrase "mechanical advantage" most closely relate to? A. The same amount of work using less force. B. The same amount of power using less work. C. The same amount of work using less power. D. The same amount of power using less

    asked on May 2, 2017
  14. science

    Recall from previous activities in this lesson which era is sometimes referred to as the Age of Mammals. Locate and click on this section of the geologic time scale, and list the other possible names that could have been used to describe this era, and why?

    asked on May 1, 2017
  15. math-precalculus

    A Ferris wheel is 50 meters in diameter and boarded from a platform that is 1 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 6 minutes. How many minutes of

    asked on April 30, 2017
  16. math-precalculus

    Outside temperature over a day can be modeled as a sinusoidal function. Suppose you know the temperature varies between 73 and 87 degrees during the day and the average daily temperature first occurs at 8 AM. How many hours after midnight, to two decimal

    asked on April 27, 2017
  17. Algebra

    A $4,000 principal is invested in two accounts, one earning 3% interest and another earning 4% interest. If the total interest for the year is $126, then how much is invested in each account?

    asked on March 17, 2017
  18. 7th grade ss unit 1 lesson 13 test

    I am stuck on the test ss 2b one the lesson 13 test Why is mining important to the economy of the Untied states? I but mineral I am so stuck on this test

    asked on March 6, 2017
  19. Science

    What is methanol?

    asked on February 19, 2017
  20. math

    One side of triangle is 5 more than 2 times the shortest side. The third side is 23 feet more than the shortest side. The perimeter is 72. Find all three sides.

    asked on February 10, 2017
  21. Math

    The land area of Statesville, NC, is 20.5 square miles. If the entire US population (currently about 320.2 million) were put inside the city limits of Statesville, determine the number of square feet that each person would have. Round your answer to two

    asked on February 10, 2017
  22. Math

    You need to buy some chicken for dinner tonight. You found an ad showing that the store across town has it on sale for $2.89 a pound, which is cheaper than your usual neighborhood store, which sells it for $2.99 a pound. Is it worth the extra drive? First,

    asked on February 10, 2017
  23. Math

    A 6 inch personal pizza has 630 calories, with 240 of those from fat. A 16 inch pizza is cut into 8 slices. Estimate the number of calories in one slice of a 16 inch pizza.

    asked on February 10, 2017
  24. Math

    It takes a hose 4 minutes to fill a rectangular aquarium 8 inches long, 9 inches wide, and 14 inches tall. How long will it take the same hose to fill an aquarium measuring 24 inches by 27 inches by 31 inches?

    asked on February 10, 2017
  25. French

    Can you fix any grammar I may have done wrong. Help Mme! Merci beaucoup. ______________________________________ 1. In the beginning of the film, the Magesty Cordelia talked to Joliterax about how Caesar almost annihilated the British army. *** Au début du

    asked on February 4, 2017
  26. science

    calculate the moles of oxygen atom in 6.2 g of calcium carbonate?

    asked on February 2, 2017
  27. math

    your brother is 1/3 your age.your sister is 6 years older than your brother. your sister is 10 years old. write and solve and equation to find your age a

    asked on January 31, 2017
  28. math

    If a gallon of milk costs $3.00, how many gallons could be bought with $42.00?

    asked on January 26, 2017
  29. AP Calculus

    Ship A is sailing due west at 8km/hr when it sees ship B northwest of its present position. If ship B is sailing due south at 3km/hr, then how close will they come on their courses?

    asked on January 9, 2017
  30. Physics

    A row of seats is parallel to a stage at a distance of 8.70 m from it. At the center and front of the stage is a diffraction horn loudspeaker that has a width of 7.50 cm. The speaker is playing a tone at a frequency of 9600 Hz . The speed of sound is 344

    asked on December 9, 2016
  31. Algebra

    For questions 1-5 solve the equation. 1.-2v-7=23 (A)15 (B)8 ★ (C)-8 (D)-15 2. X/3-10=-12 (A)-6 (B)-66 (C)6 (D)66★ 3. d/3+10=7 (A)51 (B)20 ★ (C)0 (D)-9 4. 2(2-2x)=-3x (A)-4 (B)4 ★ (C)6 (D)0 5. 2.9n+1.7=3.5+2.3n (A)3 (B)-3 (C).3 (D)1 For questions

    asked on December 2, 2016
  32. Chemistry

    A laboratory technician wants to determine the aspirin content of a headache pill by acid–base titration. Aspirin has a Ka of 3.0 × 10-4. The pill is dissolved in water to give a solution that is about 10-2 M and is then titrated with KOH solution. Find

    asked on November 17, 2016
  33. Chemistry

    Determine the mass of NH2CH2CO2Na and the volume of 0.150 M HCl solution required to make 1.35 L of a buffer solution at pH=10.75 and at a total concentration of 0.33 M. pKa(NH2CH2CO2H)=9.88. a.Mass of NH2CH2CO2Na: b. Volume of HCl solution: Hi Im sooo

    asked on November 16, 2016
  34. Chemistry

    Give a simple test that would allow you to distinguis between the following pairs of anions. Tell what you would do and what you should observe for each anion. A. CO3^2- and SO4^2- B. Cl- and SO4- C. CO3^2- and Cl- Now, for each cation A. B^3+ and Ca2+ B.

    asked on November 15, 2016
  35. Chemistry

    Use two concentration tables to calculate the concentrations of the species present in a 0.0400 M solution of CsBrO. a.[HBrO] b.[BrO-] = 0.0400M c. [H3O+] d.[OH-] hi. how would I attempt this problem. can you walk me through it or give me a hint.

    asked on November 14, 2016
  36. Chemistry

    For a 0.47 M solution of LiClO compute the pH. Hi. I am confused about this question. I calculated the pH...but my answer is wrong. what am I doing wrong??? pH=-log(0.47) pH=0.33

    asked on November 13, 2016
  37. Math

    The stockholders’ equity at the beginning of the period was $200,000; at the end of the period, assets were $255,000 and liabilities were $40,000. If the owner made no additional investments or paid no dividends during the period, did the business incur

    asked on November 10, 2016
  38. Health!

    Statistics of Suicide regarding Antisocial Personality Disorder

    asked on October 21, 2016
  39. criminal justice

    When we claim that certain moral values or principles (e.g., do not steal) apply or should apply to all people, everywhere, we are saying that some values or principles are:

    asked on October 17, 2016
  40. phyd

    How long would it take for a small pebble to fall from the top of the Grand Canyon to its deepest part?

    asked on October 11, 2016
  41. Wold History

    Having a hard time in World History! Please let me know if these are right and if not please tell me the answers! 1. How did the religious beliefs of the ancient Israelites differ from those of other nearby peoples? The Israelites believed in many gods,

    asked on September 22, 2016
  42. Math

    Find three consecutive even integers such that the sum of the smallest and largest is 36

    asked on September 14, 2016
  43. Wold History

    Which of the following most directly resulted from the Neolithic Revolution? •Populations increased. •Complex cultures blended. •Religion became less important. 2. Which of the following best describes the emergence of social classes in early

    asked on September 13, 2016
  44. math

    1.8e+6 in simplest form?

    asked on September 12, 2016
  45. physics

    A highway curve forms a section of a circle. A car goes around the curve. Its dashboard compass shows that the car is initially heading due east. After it travels 620. m, it is heading 30.0° south of east. Find the radius of curvature of its path.

    asked on September 7, 2016
  46. Algebra II

    Let f(x) = 2x − 6. Solve f^−1(x) when x = 2. I think it is 4. f(x) = 2x - 6 y = 2x - 6 x = 2y - 6 +6 + 6 x + 6 = 2y ----- ---- 2 2 x + 6 ----- = y or f^-1(x) 2 x = 2: 2 + 6 8 ----- = --- 2 2 8 --- = 4 2

    asked on August 18, 2016
  47. hard core physics

    A car is at motion.It horns an hears the echo of the sound after 6 sec.find the speed of the car.

    asked on July 27, 2016
  48. Physics

    A 22 kg suitcase is being pulled with constant speed by a handle that is at an angle of 23 ∘ above the horizontal. If the normal force exerted on the suitcase is 150 N , what is the force F applied to the handle? I don't understand how the equations are

    asked on June 16, 2016
  49. Stats

    A genetic experiment with peas resulted in one sample of offspring that of 421 green peas 155 yellow peas. Construct a 95% conf. Interval for yellow peas. _

    asked on May 29, 2016
  50. Language Arts

    The man quickly but carefully opened the oyster’s hard shell. A. quickly B. but C. carefully D. opened I think the answer is B but i am not sure. Can you check this and explain what a conjunction exactly is. Thanks!

    asked on April 18, 2016
  51. Statistics

    A card is drawn from a well shuffled deck of 52 cards. Find P (drawing an acre or a 9)

    asked on April 7, 2016

    With what maximum speed can an unsecured passenger stay in their seat on a Ferris wheel that has a diameter of 12 m. so, this happens when Fn is zero or mg = mv^2/r. v = sqrt(gr) so is it v=sqrt9.8 what would happen with the 12m

    asked on March 23, 2016
  53. Microbiology

    PLEASE HELP I AM NOT SURE WHAT THE CORRECT ANSWERS ARE: I have guessed them please let me know if they are correct. 1. The LEAST likely microbe to be used as a biological weapon would have which of the following characteristics? a. spread by insect vectors

    asked on March 21, 2016
  54. Calculus

    A rectangle is inscribed in the interior section cut from the parabola x = 1/4 y2 by the line x=3. One side of the rectangle lies on the line. Fine the maximum area of such a rectangle.

    asked on March 17, 2016
  55. math and algebra

    on the number line below locate and label the points the represent the rational numbers listed in part (a).Describe the relationship between these two numbers.Zero on the number line represents Isaac's balance before the mistake was made

    asked on March 4, 2016

    a block is given an initial velocity of 3 m/s up the 22 degree plane. A.) How far up will the plane go B.) How much time elapses before it returns to its starting point. IGNORE FRICTION A) I got 1.2m B.) I got 1.6s I'm confused on this question: Both

    asked on February 24, 2016
  57. Chem

    joules needed to melt 30.0 g of ice at 0 ∘C and to warm the liquid to 60.0 ∘C so i did Q=mFf which i set up like 30.g x 334 j/c = 10020 J then i'm sorta confused what i'm doing next. explain in detail please?

    asked on February 15, 2016
  58. Social Studies

    How does recycling influence culture

    asked on February 7, 2016
  59. math

    according to the triangle inequality, the length of the longest side of a triangle bust be less than the sum of the lengths of the other two sides. the two shortest sides of a triangle measure 3/10 and x + 1/5 and the longest measures 3/2x. write an

    asked on January 15, 2016
  60. International business

    critically evaluate this statement 'an international retailers preferred market entry method directly affects its market Selection decisions

    asked on December 17, 2015
  61. math

    If it takes a lawn company 5 hours to cut 6 lawns, how many yards can be cut in 12.5 hours?

    asked on December 9, 2015
  62. Child Development and Human Behavior

    . Which of the following factors helps a child develop a positive self-concept? A. Material wealth B. The sex of the child C. Family relationships D. Conflicts with teachers

    asked on December 8, 2015
  63. civics

    Please check my answers! 1. The Nineteenth Amendment granted women the right to vote, but women had been fighting for years for this right. Before the Nineteenth Amendment was passed, which existing amendment could women have used to argue that they should

    asked on December 2, 2015
  64. Chemistry

    If you want to prepare 2.0 liters of a .25 M solution of NH4Cl, how many grams of the salt should you weigh out?

    asked on November 29, 2015
  65. Chemistry

    Assume you have prepared 100.0 mL of a buffer solution using 0.400 mol of acetic acid (pKa = 4.74) and 0.400 mol of sodium acetate. The pH of this buffer solution is initially 4.74. After preparing this buffer solution, you added 55.0 mL of a 1.10 M NaOH

    asked on November 26, 2015
  66. Chemistry

    A chemist needs to prepare a buffer using the carbonate system (information in the table in the previous quetion) with a final pH of 10. Which components should they mix in water to product this buffer? Question options: H2CO3 HCO3- CO32-

    asked on November 26, 2015
  67. Chemistry

    A chemist needs to prepare a buffer using the carbonate system (information in the table below) with a final pH of 6. Which components should they mix in water to product this buffer? H2CO3 HCO3- CO32- pKa 6.35 10.33 N/A

    asked on November 26, 2015
  68. Chemistry

    The pH of a buffer can be predicted using the Hendersen-Hasselbach equation: pH=pKa+ log([conjugate base][conjugate acid]) The choice of the conjugate acid-base pair (as you did in the previous questions) determines the pKa value to be used in the H-H

    asked on November 26, 2015
  69. Science

    A 6.90-g sample of solid NiSO4·6H2O was heated such that the water turned to steam and was driven off. Assuming ideal behavior, what volume would that steam occupy at 1.00 atm and 100.0 °C?

    asked on November 19, 2015
  70. precalc

    Solve in radians. 1) sin2X = 1/2 2) tan2 (X + pi/2) = 1 3) 5 - 3sec (X - pi/4) = -1

    asked on October 27, 2015
  71. Physics

    A boat moving at 5 mi/h is to cross a river in which the current is flowing at 3 mi/h. In what direction should the boat head to reach a point on the other bank of the river directly opposite the starting point?

    asked on October 7, 2015
  72. jones

    What is greaterthan 40 and less than7 tens

    asked on October 5, 2015
  73. W

    Some people in a hotel are dropping water balloons from their window onto the ground below. The balloons take .15s to pass your 1.6m tall window. Where should security look for the raucous guest? Express your answer using tow significant figures.

    asked on September 23, 2015
  74. Algebra

    On successive plays, the home football team gains 12 yd, loses 3 yd, loses 5 yd, gains 15 yd and runs 16 yd for a touchdown. What is the average gain or loss in yards per play?

    asked on September 14, 2015
  75. chem

    The half-life of the Nobelium isotope No^257 is about 23 seconds. 644 seconds (or 28 half-life periods) after the isotope was released there were 20 grams remaining. The number of grans of No^257 after h half life periods is M= 20 * (1/2)^h where h = 0

    asked on September 13, 2015
  76. algebra

    Maria shares a house with 4 others. She pays $500 rent per month plus her utilities. If the utilities cost a total of x dollars, how much more money,M, does maria owe Write an equation for how much maria owes.

    asked on September 9, 2015
  77. math

    The standard deviation of a sample taken from population A is 17.6 for a sample of 25. The standard deviation of a sample taken from population B is 21.2 for a sample of 30. The standard deviation of the sample mean differences is_____. (Round your answer

    asked on July 15, 2015
  78. chemistry

    50cm3 of hydrogen is collected over water at 17 degree celsius and 750 mm Hg pressure.Calculate the volume of dry gas at S.T.P.The water vapour pressure at 17 degree celsius is 14 mm Hg?

    asked on May 28, 2015
  79. Art and Creative Development

    Art helps children socially because: A. they can make artistic products for others to see at art shows B. during are activities, they interact and learn social skills such as sharing and taking turns. C. they can make crafts that can be sold to other

    asked on May 4, 2015
  80. Art and Creative Development

    Young children who learn easily, ask thought-provoking questions, and are very curious are often: A. gifted or talented B. behavior problems in the classroom C. poor at following directions D. overly shy and withdrawn socially i think it is between a and d

    asked on May 4, 2015
  81. physics

    two charges of equal magnitude are 25.5 cm apart if the force between the charges is 155 N what is the magnitude of the charges

    asked on April 28, 2015
  82. math

    Sam has 18 coins in his pocket that are either quarters or nickels. The total value of these coins is $3.90. Let q represent the number of quarters and n represent the number of nickels. The following system of equations represents this situation: q+n=18

    asked on April 27, 2015
  83. math

    A community group bought 25 tickets to a play. Adult tickets cost $30 each and student tickets cost $20 each. In all, the group spent $620 on the tickets. Determine if each equation is a part of the system of equations that can be used to find the number

    asked on April 27, 2015
  84. Geometry

    Describe the difference between saying that two segments are congruent and saying that two segments have equal length. When would you use each phrase?

    asked on April 23, 2015
  85. World History

    Explain the impact of the Japanese attack on Pearl Harbor.

    asked on April 18, 2015
  86. physics

    find the weight of a person with a mass of 68.0kg

    asked on April 15, 2015
  87. Radiometric (Radioactive) Dating

    How old is a sample that contains 125 atoms of U-235 and 375 atoms of Pb-207? ...Given that the half life values on my handout are 713 million years. *I do not even know where to start so could you please explain in steps too? Thanks.

    asked on March 29, 2015
  88. finite math

    Sam wants to invest the same amount at the end of every 3 months so that he will have 4000 in 3 years. The account will pay 6% compounded quarterly. How much should he deposit each quarter.

    asked on March 27, 2015
  89. finite math

    A young couple saves for a down payment on a house by depositing $100 each month into an annuity that pays a 4.8% annual rate. Find the amount in the annuity at the end of 2 years.

    asked on March 27, 2015
  90. Chemistry

    An electron has an uncertainty in its position of 507pm. What is the uncertainty in its velocity?

    asked on March 13, 2015
  91. High School Algebra II

    Hey friends, I have a big assignment I've been given that I really, really could use an 100% on. I've been working on it for hours and have a decent amount done, have had teacher help, and have had friends work with me on it, but I still need help. If

    asked on March 8, 2015
  92. chemistry

    At 29.6 degrees C, pure water has a vapor pressure of 31.1 torr. A solution is prepared by adding 86.7 g of "L" a nonvolatile nonelectrolyte to 390.0 g of water. The vapor pressure of the resulting solution is 27.6 torr. Calculate the molar mass of "L"

    asked on February 13, 2015
  93. statistics

    Produce a 99.9 % confidence interval for the population mean body temperature of a healthy male. Then do the same for the population of healthy females. Round your answers to three decimal places.

    asked on February 3, 2015
  94. finance

    A stock has a beta of 2.0. A security analyst who specializes in studying this stock expects its return to be 24%. Suppose the risk-free rate is 6 percent and the market-risk premium is 10 percent. Is the stock overvalued or undervalued relative to the

    asked on December 8, 2014
  95. Algebra

    I need help with my math pizzazz worksheet page 167 1.3x-5y=13 X-2y=5 2.7x-2y=-1 3x-4y=19 3.2x+3y=7 3x+4y=10

    asked on December 8, 2014
  96. algebra

    to conduct a scientific experiment, students need to mix 90 millimeters of a 3% acid solution. They have a 1% solution and a 10% solution available. How many millimeters of a 1% solution and of the 10% solution should be coming to produce 90 millimeters of

    asked on December 7, 2014
  97. Chemistry

    A) if you added 8g of ammonium nitrate to 25mL of room temperature water, what would be the temperature in °C?

    asked on November 30, 2014
  98. MATH 100

    The illumination of an object by a light source is directly proportional to the strength of the source and inversely proportional to the square of the distance from the source. If two light sources, one 10 times as strong as the other, are placed 9 ft

    asked on November 27, 2014
  99. Fins nance business

    1. Find the future value of current $1,000 5 year from now when annual interest rate 8% is compounded annually 2. Find the present value of a future value (1,000) four years from now when annual interest rate 8% is compounded quarterly. 3.Find the present

    asked on November 20, 2014
  100. chemistry

    Let's say for example I have 5g of copper in a beaker. Mass would be 5g + mass of beaker. If I add any given amount of water to the beaker containing the copper, that will change the mass of the beaker containing the copper. Am I correct so far? So then if

    asked on November 5, 2014


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