# 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

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

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

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

. 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?

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

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

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.

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

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

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

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

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),

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?

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.

16. ## english

what is a good thesis statement for jim crow laws?

17. ## Chemistry

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

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)

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.

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.

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

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

23. ## Science

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

24. ## Cooking catering

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

25. ## math

show25 broken key is 5 show in 3 ways

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

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...

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?

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!

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

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)

32. ## Accouning

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

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

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 =

35. ## math

what is -.ooo552 in scientific notation

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.

37. ## Language Arts

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

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

40. ## Science

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

41. ## Geography

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

42. ## Math - Pre Algebra

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

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

45. ## Language Arts

what is an antonym for rationalize?

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

47. ## Intro to physical science

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

48. ## Social Studies

what are the main resources of Sudan in East Africa?

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?

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.

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?

52. ## 2nd grade math homework

does the broken key 5 means not to use the number5

2/3+y=3/4

54. ## Algebra 1

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

55. ## Pre Algebra

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

56. ## Social Studies

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

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

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

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

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

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

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"

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?

64. ## art

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

65. ## Physics

what is calculus

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.

67. ## Science

what are the 6 rules to draw atoms?

69. ## Social Studies

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

70. ## Us History

why were europeans interested in asia?

71. ## math- pre algebra

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

72. ## Technology

Is a cellphone an electrical appliance

73. ## Pre Algebra Math

How to write a rule for a linear function?

74. ## math pre algebra

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

75. ## science

explain how trees affect the water cycles including deforesting

76. ## Social Studies

How might irrigation help a region's economic development?

77. ## social studies

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

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-

79. ## Algebra1A

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

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.

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.

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=Rs50Ã—3x=150x Cost of trouser material cloth =Rs90 Ã—2x=150x S.P. of shirt material

posted on September 16, 2016
7. ## math

posted on April 5, 2016
8. ## Math

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