Tanisha

Most popular questions and responses by Tanisha
  1. chemistry

    Given: *Fe2O3(s)+3CO(s)-->2Fe(s)+3CO2(g)(delta h is -23kJ) *3Fe2O3(s)+CO(g)-->2Fe3O4(s)+CO2(g)(delta h is -39kJ) *Fe3O4(s)+CO(g)-->3FeO(s)+CO2 (delta h is 18kJ) Desired:FeO(s)+CO(g)-->Fe(s)+CO2(g) find delta h for the desired reaction. which reactions do i

    asked on March 26, 2008
  2. chemistry 106

    The first step in the industrial recovery of zinc from the zinc sulfide ore is roasting, that is, the conversion of ZnS to ZnO by heating. 2 ZnS(s) + 3 O2(g) → 2 ZnO(s) + 2 SO2(g) ΔH = -879 kJ/mol Calculate the heat evolved (in kJ) per gram of ZnS

    asked on March 3, 2010
  3. Maths

    here are some of the ingredients for bolognese sauce 400g minced beef 800g chopped tomatoes 600ml Stock 300ml red wine Julie has only had 300g of minced beef how much of other ingredients should she use

    asked on October 1, 2016
  4. chemistry 106

    Dry air near sea level has the following composition by volume: N2, 78.08 percent; O2, 20.94 percent; Ar, 0.93 percent; CO2, 0.05 percent. The atmospheric pressure is 1.00 atm. (Hint: Since volume is proportional to the number of moles present, mole

    asked on March 1, 2010
  5. business math

    . Ludwig borrowed $8,000 on July 20, at 11% interest. If the loan was due on October 17, what was the amount of interest on the loan using the exact interest method?

    asked on September 7, 2014
  6. PRE*******ALGEBRA

    WRITE A FUNCTION RULE TO DESCRIBE EACH SITUATION. PLEASE HELP I DO NOT UNDERSTAND THIS AT ALL. The number of pounds p(z)as a function of the number of ounces z. The selling price s(c)after a 45% markup of an item as a function of the stores' cost c. The

    asked on April 30, 2009
  7. Business Math

    7. By using the table in the handbook, the present value of $12,000 for six years compounded at 6 percent semiannually is:

    asked on October 4, 2012
  8. chemistry 106

    Nitroglycerin, an explosive compound, decomposes according to the equation below. 4 C3H5(NO3)3(s) 12 CO2(g) + 10 H2O(g) + 6 N2(g) + O2(g) Calculate the total volume of gases when collected at 1.2 atm and 25°C from 1.3 multiplied by 102 g of nitroglycerin.

    asked on February 28, 2010
  9. Social Studies Homework (About USA And Canada)

    I need help with one question and I need one question answer checked! Social Studies Homework: 1)What are the two main languages of USA? Answer: English and Spanish 2)What are the two main languages of Canada? (Please give an direct answer for question 2

    asked on December 29, 2006
  10. Math

    I need help with my math homework.I searched for homework help forums and I found the Jiskha Website on the Google Website so this is my first time.I am new. Math Homework: What is the value of number 3 in 2,539? What is the value of number 9 in 4,879 What

    asked on December 26, 2006
  11. Business Math

    2. The interest on $6,000 at 6 percent compounded semiannually for 8 years is: (Use table in the handbook) (Points : 1)

    asked on October 5, 2012
  12. chemistry 106

    A 0.1589 g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter contains exactly 251 g of water, and the temperature increases by 1.126°C. Calculate the heat given off by the burning Mg, in kJ/g

    asked on March 3, 2010
  13. chemistry 106

    Methanol, ethanol, and n-propanol are three common alcohols. When 1.00 g of each of these alcohols is burned in air, heat is liberated. Calculate the heats of combustion of these alcohols in kJ/mol. (a) methanol (CH3OH), -22.6 kJ (b) ethanol (C2H5OH),

    asked on March 3, 2010
  14. chemistry 106

    The pressure of 6.0 L of an ideal gas in a flexible container is decreased to one-half of its original pressure, and its absolute temperature is decreased to one-seventh of the original. What is the final volume of the gas?

    asked on February 28, 2010
  15. Math Pre Algebra

    Find the simple interest. $900 deposited at an interest rate of 3% for 5 years. $1,348 deposited at an interest rate of 2.5% for 18 months.

    asked on April 14, 2009
  16. english

    what is a good thesis statement for jim crow laws?

    asked on March 11, 2010
  17. Chemistry

    If 23.7g of C8H18 are combusted, what mass of water will be produced?

    asked on September 7, 2013
  18. chemistry 106

    Which of the following standard enthalpy of formation values are not zero at 25°C? (Select all that apply.) H2(g) N2(g) Au(s) Be(s) H20(g) Ne(g)

    asked on March 3, 2010
  19. Math - Pre Algebra

    Simple and Compound Interest Find the simple interest. principal= $870 interest rate= 6% time= 9 months Please help me I need the answer for tommorow.

    asked on April 13, 2009
  20. chemistry

    Calculate the wavelength (in nanometers) of a photon emitted by a hydrogen atom when its electron drops from the n = 4 state to the n = 3 state.

    asked on March 23, 2010
  21. math

    so if my question is find the dimensions of a box that will hold twice as many cubes as a box that is 2 by 6 by 4 a] volume of original box: 48 b]volume of new box is :96 c] dimensions of new box is 12 by 4 by 2

    asked on October 7, 2008
  22. chemistry 106

    A gas-filled balloon having a volume of 1.50 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23°C and 3.00 multiplied by 10-3 atm, respectively. Calculate the

    asked on February 28, 2010
  23. Science

    If a planet had a surface with craters but no other features, what could I say about the inside of the planet?

    asked on April 14, 2009
  24. Cooking catering

    When your creating garnishes which of the following is the most adaptable to creative and interesting shapes

    asked on March 12, 2014
  25. math

    show25 broken key is 5 show in 3 ways

    asked on September 27, 2011
  26. Math

    Find the dimensions of a box that will hold twice as many cubes as a box that is 2 by 6 by 4

    asked on October 7, 2008
  27. Math Help!!!

    How many 3 letter sequences can be formed if the first letter must always be a consonant (not a, e, i, o, u), the second letter must always be a vowel (a,e,i,o,u) and 3rd letter must be different from the first. A. 2100 B. 4056 C. 3250 D. 2625 I chose A...

    asked on May 18, 2015
  28. math Help!!!!

    You have 1 red marble, 1 blue marble, 1 yellow marble and 1 white marble. You draw 2 marbled out of the bag without replacing. What is the probability that you may choose 1 red marble?

    asked on May 18, 2015
  29. Chemistry

    A reaction has a standard free-energy change of -11.80 kJ/mol (-2.820 kcal/mol). Calculate the equilibrium constant for the reaction at 25 degrees C. Please help!

    asked on November 9, 2011
  30. Please Help Me With My Math Homework

    I wrote my math homework questions. It's in Jiskha Homework Help Forum In: Name:Tanisha Subject:Math Thank You! I already replied, you don't need to make a new question asking someone to answer...... Thanks for the answer! It was a good help! the product

    asked on December 26, 2006
  31. chemistry 106

    Calculate the work done if a gas is compressed from 8.3 L to 3.3 L at constant temperature by a constant pressure of 3.0 atm, and give your answer in units of joules. (1 L · atm = 101.3 J)

    asked on March 3, 2010
  32. Accouning

    Help Needed ASAP!!!There's too much questions to be asked.

    asked on January 12, 2008
  33. statistics

    Directional and nondirectional hypotheses can be easily interchanged according to the hypothesis the researcher is testing. For instance, a drug company might predict that a drug will help a subject lose weight while another drug company might predict that

    asked on December 11, 2015
  34. chemistry 106

    Determine the amount of heat (in kJ) given off when 2.23 multiplied by 104 g of ammonia are produced according to the following equation. Assume that the reaction takes place under standard-state conditions at 25.0°C. N2(g) + 3 H2(g) 2 NH3(g) ΔH°rxn =

    asked on March 3, 2010
  35. math

    what is -.ooo552 in scientific notation

    asked on March 1, 2010
  36. chemistry 106

    calculate the pressure exerted by 1.00 moles of CO2 confined in a volume of 5.00 L at 450. K. Compare the pressure with that predicted by the ideal gas equation.

    asked on February 28, 2010
  37. Language Arts

    what is free verse poetry? What are all of the examples of poetry?

    asked on September 17, 2009
  38. math

    Andy averages 17 points per game during 5 games of the basketball season. If he scored 12, 24, 20, 18 in four of the games. How many points did he score in the 5th game. 17 * 5 = 85 12 +24 +20 +18 +x = 74 85-74 = 11

    asked on May 15, 2015
  39. math

    please help with daughters homework show 25 broken key is 5 show in 3 ways

    asked on September 27, 2011
  40. Science

    Why do astronomers need to use special methods to detect star systems?

    asked on April 29, 2009
  41. Geography

    How does climate types found in East Africa influence what grows there? Thank You in Advance to whoever helps me!!

    asked on April 13, 2009
  42. Math - Pre Algebra

    Thank you soo much!! But can you show me the steps on how to caculate 1280(1.13)^3.

    asked on April 13, 2009
  43. Math - Pre Algebra

    $1280 at 13% compound annually for 3 years Use the formula: B= p(1+r)n Please help me I need the answer for tommorow

    asked on April 13, 2009
  44. math

    5 kids median age is 9. Two of the kids ages are 5. The range of all the kids is 7. What is the age of the 2nd to the oldest. Please help....! a. 5 b. 7 c. 9 d. 12 to figure it out, i tried this 1. 12 2. 11 3. 9 4. 5 5. 5

    asked on May 15, 2015
  45. Language Arts

    what is an antonym for rationalize?

    asked on September 8, 2009
  46. World History

    which country had more than a dozen colonies in what is now the U.S along the atlantic coast by the mid-1700s? a.holland b.britain c.spain or d.france

    asked on May 31, 2009
  47. Intro to physical science

    I need a relating topic to physical science that is relating to the reasl world?

    asked on May 30, 2009
  48. Social Studies

    what are the main resources of Sudan in East Africa?

    asked on April 21, 2009
  49. Science

    I have two questions. How can an atmosphere affect the temperature of a planet's surface? If a planet had a surface with craters but no other features, what could you say about the inside of the planet?

    asked on April 14, 2009
  50. maths

    In an A.P., the first term is 2 and the sum of the first five terms is one-fourth of the next terms. Show that 20th term is -112.

    asked on November 7, 2016
  51. math

    Monday -4 degrees Fahrenheit increase 6 degrees. On Tuesday it increased 2 degrees. For the next 7 days it increased. What is the temperature on the 9th day?

    asked on May 15, 2015
  52. 2nd grade math homework

    does the broken key 5 means not to use the number5

    asked on September 27, 2011
  53. ALGEBRA 1

    2/3+y=3/4

    asked on September 17, 2009
  54. Algebra 1

    solve this equation. show ur wrk work plz. 8y-(2y-3)=9

    asked on September 17, 2009
  55. Pre Algebra

    5x-y=6 what is the equation in slope intercept form?

    asked on April 29, 2009
  56. Social Studies

    Why are foreign investors hesitant to invest in many countries in East Africa?

    asked on April 28, 2009
  57. To:Jasmine20

    Guru is like a master. Did you had help with the questions and answers of HINDU RELIGION? I mean the one you posted that you need another religion, not your religion did you got help? I think jasmine20 is not on jiskha I HAVE TO TRY AND FIGURE OUT SOME

    asked on December 29, 2006
  58. inclusive language

    Can you please verify if I have done this correctly 1. Each advisor was contacted by his students. my answer Each advisor was contacted by their students. or Each advisor was contacted by his or her students. His or her students, not their students

    asked on November 22, 2006
  59. Maths probability

    Records show that 8% of blood samples tested for a certain condition test positive. Assuming that whether or not a blood sample tests positive is independent of whether or not any other blood sample tests positive, calculate by hand the following

    asked on January 16, 2017
  60. Math Help!!!

    How many ways are there to choose a potato and two green vegetables from a choice of three potatoes and seven green vegetables? A. 126 B. 63 C. 21 D. 252 i chose A. But im 50% not sure Please help test tomorrow something similar

    asked on May 18, 2015
  61. math...Please help!!!!

    This is a standard deviation question. I don't know much about standard deviation. Here it goes... Teachers making 30,000 to $60,000 the union is considering a $1,000 pay raise. A. Will the standard deviation change and the mean and the median stay the

    asked on May 18, 2015
  62. math

    What is the shape of a linear function on a coordinate plane. choices are: a. circle b. ellipse c. vertical d. horizontal I chose "D"

    asked on May 15, 2015
  63. Finite Math

    The purchases made by customers at a convenience store are normally distributed, with a mean of $5.50 and a standard deviation of $3.50. What is the probability that a randomly chosen customer makes a purchase between $2.00 and $9.00?

    asked on March 9, 2014
  64. art

    What happens when negative and positive shapes begin to fuse together?

    asked on November 26, 2013
  65. Physics

    what is calculus

    asked on October 24, 2010
  66. math

    The volume of a cone is three hundred cubic kilometers. If the radius of the base is 9 kilometers, what is the height of the cone? Use three point one four for pi. Show your work and round to the nearest tenth.

    asked on August 27, 2010
  67. Science

    what are the 6 rules to draw atoms?

    asked on September 30, 2009
  68. ALGEBRA 1

    2/3+y=3/4 please show your work

    asked on September 17, 2009
  69. Social Studies

    What role did religious freedom play in the founding of Rhode Island and Pennslyvania?

    asked on September 15, 2009
  70. Us History

    why were europeans interested in asia?

    asked on September 6, 2009
  71. math- pre algebra

    can you help me with this equation and may you please show your work? -3=3-y

    asked on May 25, 2009
  72. Technology

    Is a cellphone an electrical appliance

    asked on May 17, 2009
  73. Pre Algebra Math

    How to write a rule for a linear function?

    asked on April 30, 2009
  74. math pre algebra

    what is the slope of y=5x-6 and y=7/2x +5 ?

    asked on April 29, 2009
  75. science

    explain how trees affect the water cycles including deforesting

    asked on April 28, 2009
  76. Social Studies

    How might irrigation help a region's economic development?

    asked on April 21, 2009
  77. social studies

    Where is the eastern rift located? Where is the western rift located?

    asked on April 14, 2009
  78. chemistry

    Which of the following halides forms a solid when added to silver? (More than one answer may be selected) 1) Cl- 2) Br- 3) F- 4) I-

    asked on March 24, 2008
  79. Algebra1A

    (-3,4);-2x+1

    asked on March 20, 2008
  80. Where are you Jasmine20, I answered your Homework

    Please check your homework answer At: Name:Tanisha Subject: To:Jasmine20 I posted the answer for GURU DEFINITION. HOPE IT HELPS!!! I think jasmine20 is not on jiskha.

    asked on December 29, 2006
  81. inclusive language

    Can you please verify if I have done this correctly 1.The directors and their wives met the stockholders for a night on the town. my answer The directors and their spouses met the stockholders for a night on the town. You are correct.

    asked on November 22, 2006
  1. maths

    A. Four factories are to be randomly selected from a list of eleven factories for a full health and safety inspection i. Calculate the number of ways that four factories can be selected. ii. Two of the factories have the same owner. Calculate the

    posted on April 3, 2019
  2. Math

    Suppose a man is 35 years old and would like to retire at age 60. Furthermore, he would like to have a retirement fund from which he can draw income of $125,000 per year— forever! How can he do it? Assume a constant APR of 8%.

    posted on January 3, 2019
  3. physics

    Very funny question!!!!!!!!!!!!!!!!!!!!

    posted on June 21, 2018
  4. Science

    Explain briefly how it is 43.84%

    posted on October 28, 2017
  5. Math

    Rebate 12000 Discount 2.4

    posted on November 2, 2016
  6. Math

    Cost of 1m shirt material=Rs50 Cost of 1m trouser material=Rs90 Let Has an buys shirt material =3x Hasan buys trouser material =2x Cost of shirt material cloth=Rs50×3x=150x Cost of trouser material cloth =Rs90 ×2x=150x S.P. of shirt material

    posted on September 16, 2016
  7. math

    The answer is 30

    posted on April 5, 2016
  8. Math

    So. The answer is seven

    posted on October 26, 2015
  9. math

    I don not now how to do this

    posted on October 26, 2015
  10. Math Help!!!

    I chose A...i guessed. Its really hard

    posted on May 19, 2015
  11. math

    -4 + 6 + 2(7) = I put 2+14 = 16

    posted on May 15, 2015
  12. math

    -4 + 6 + 2(7) = I put 2+14 = 16

    posted on May 15, 2015
  13. wlac

    . $13,027.57

    posted on September 7, 2014
  14. sentence skills

    but

    posted on August 11, 2011
  15. English

    how does the The character in “My Mother” feel?

    posted on June 2, 2011
  16. Geometry

    a right triangle has legs of 24 units and 18 units. the lenght of the hypotenuse is?

    posted on April 26, 2010
  17. Introduction Enngineering

    i need bad help

    posted on November 3, 2009
  18. Algebra 1

    nika did you just copy the answer? thnx Ms. Sue

    posted on September 17, 2009
  19. Language Arts

    thnx!

    posted on September 17, 2009