deedee

Most popular questions and responses by deedee
1. chemistry

Use standard enthalpies of formation to calculate ΔHrxn° for each reaction. (See the appendix. Enter your answer to the tenth place.) (a) 2 H2S(g) + 3 O2(g) 2 H2O(l) + 2 SO2(g) (b) N2O4(g) + 4 H2(g) N2(g) + 4 H2O(g) (c) SO2(g) + 1/2 O2(g) SO3(g) These

2. Chemistry

Calculate the [H3O+] and pH of each polyprotic acid solution. (b) 0.116 M H3C6H5O7 I did part (a) just fine, but for some reason can't figure (b) out. Can someone help me with just the [H3O+] part to get me started? I already got 9.3e-3 and 1.4e-3 without

3. chemistry

NH4NO3(s) NH4+(aq) + NO3−(aq) In order to measure the enthalpy change for this reaction above, 1.07 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8°C and the final temperature (after the solid

4. Analytical Chemistry

Could someone show me step by step how to solve this type of problem? I have to do several of them, and would love to understand what is actually happening! Thank you so much in advance, I appreciate your help and time! Calculate the weight percent of

5. Sign Language

When you are signing a comparative adjective, do you add the sign for the suffix “-ER” after or before the descriptive word is signed?

6. CHEMISTRY

According to the equation H2SO4+2NH3 @(NH4)2SO4. What mass of ammonium sulfate will result from the reaction of 5.00 g of NH3?

7. Stats

The area between the mean and a Z score of +1.50 is 43.32%. This score is higher than ___ of the score in the distribution.

8. statistics

A and B are events defined on a sample space, with the following probabilities. Find P(A and B). (Give your answer correct to two decimal places.) P(A) = 0.5 and P(B | A) = 0.4

9. objects of value

What is a good way to get an idea of how much money certain old items could be worth?

carol miller went to europe and forgot to pay her \$740 mortgage payment on her new hampshire house. for her 59 days overdue on her payment, the bank charged her a penalty of \$15 (assume 360 days) what was the rate of interest charged by the bank?

11. eth 125

Throughout most of U.S.history in most locations, what race has been the majority? What is the common background of most members of this group?

12. public speeking

What might be some modern examples of speech styles that weren't discussed in the lecture? Defend why you consider these to be modern styles. In the lecture-new channels of speaking that have developed as a result of changes in technology. New forms of

13. statistics

These data were generated using the equation y = 2x + 1. A scatter diagram of the data results in five points that fall perfectly on a straight line. x 0 1 2 3 4 y 1 3 5 7 9 (a) Find the correlation coefficient.

Health systems can be formed through which of the following mechanisms Ownership Not-for-profits For-profits Mergers

15. math

The table lists data regarding the average salaries of several professional athletes in the years 1991 and 2001. year average salary 1991 \$263,000 2001 \$1,430,000 a)Use the data points to find a linear function that fits the data. b) Use the function to

16. math

A and B are events defined on a sample space, with the given probabilities. Find P(A and B). (Give your answer correct to two decimal places.) P(A | B) = 0.43 and P(B) = 0.75

17. Chemistry

My Chem professor is out for the weekend and I'm confused about what the question is asking or the equations needed... A 10.0-g block of pure nickel (Cp = 0.445 J/g-°C) is brought to each of the temperatures below. A sealed beaker containing 15.0 g water

18. physics

A bomber flies horizontally with a speed of 235 m/s relative to the ground. The altitude of the bomber is 3570 m and the terrain is level. Neglect the effects of air resistance. The acceleration of gravity is 9.8 m/s2 . a) How far from the point vertically

19. math

2-2 divided by -2=?

20. Trigonometry

A triangle has two angles, one 90 degrees, the other (between adjacent and hypotamuse) 26 degrees, and a hypotamuse of 10ft. Find the opposite side's length. Hint: use sine. I think I'm supposed to do 10(sine26), but the answer isn't right. What am I

21. economics

I am writing a paper on the technology industry. Can anyone guide me to some good sites to find information on the following: 1.shifts and price elasticity of supply and demand 2.positive and negative externalities 3.wage inequality 4.monetary and fiscal

22. policial science

I have to do an interview so can you guys help me out answering these questions? I need atleast 2 person's oppionion 1- do you agree with the Bush Administration policy of spreading Democracy you and the world. 2- Do you how Bush agree w. handling the war

23. Math

Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x))

24. public speaking

What are some moderen examples of speech styles?

25. math

Solve. x+1/3 + x+2/7 =2

26. math

is this correct? find the slope (1,6) (-6,-5) -5-6 -6-1=11/7

27. Math

A single die is rolled. (a) What is the probability that the number on top is a 3. (Give your answer correct to two decimal places.) (b) What is the probability that the number on top is an odd number. (Give your answer correct to two decimal places.) (c)

28. solution

how much oxygen would be found in 10.0gal of water at 20c

29. math

Can someone please check my work? Solve using substitution method 1. 3x+2y=12 x=52-6y answer:-40.8 I am pretty sure that one is wrong. Solve using elimination method 2. 2r-7s=-31 7r+2s=24 answer: (230/53,-468/53) 3.3x+4y=3 6x+8y=6 answer: No answer.

30. Algebra 1

11) Tell which real number corresponds to the situation. During a quiz, a person loses 1800 pts. answer: -1800 12) Solve for y z=yq Answer: z-q=y 13) Solve using the multiplication principle 10x=-90 Answer: x= -9 14) Collect like terms 20w+w+14/19w Answer:

31. Algebra 1

Can someone please check my answers? Thank You 1) Find an equivalent expression without parenthesis -(y+87) Answer: -y-87 3) Solve -3x-13x=96 answer: x= -6 4) Find the decimal notation 14/25 Answer: .56 5) Divide if possible 7/0 Answer:0 6) Solve 7x+10=52

32. math

find -x when x -92/29 wouldn't this be 92/29

33. math

find the best buy on cashews a.12oz for \$5.39 b.1lb4oz for \$7.39 c.10oz for \$4.89 d.1lb for \$6.39 B)Is this correct

34. Math

Could someone check over these for me? Thank you soooooooo much! 1.Maria earns \$14/hr. Last week she worked 7 hour days for 4 days. What was her gross pay? \$392 2.Arrange the given fractions from smallest to largest. 3/10,1/9,1/12 1/12,3/10,1/9 3.write the

35. math

7/9 - (-13/18)=

36. math

-3/5 +8/35=? 7/9 -(-13/18)= (4)(-3/2)= -21-(-9)= -21-(-21)=

37. math

A salesperson drove 238, 159, 87, 163, and 198 miles (mi) on a 5-day trip. What was the mean number of miles driven per day?

38. math

What units in the metric system would you use to measure each of the following quantities? (a) Distance from Los Angeles to New York (b) Your waist measurement (c) Width of a hair (d) Your height

39. Social Studies

How would you expect winter temperatures to differ in a coastal city at the same latitude as the interior city?

40. Social Studies

How do bodies of water affect temperatures

41. Finite Math

A pair of dice is rolled and the resulting sum is odd. The complement of this event would be the sum of that is a multiple of 3? True or false

42. Calculus I

Hello! I am not sure why I am getting this problem wrong, and I keep getting six. Could someone be kind enough to show me how it's done? Thank you very much in advance! Find the limit. Use l'Hospital's Rule if appropriate. lim ((5x − 2)/(5x + 4))^(5x +

43. chemistry 2 college

explain how to find the mass of solute in the solution: 50.0g of solvent in a 10.0% NaCl solution?

44. physics

Under what conditions can you use the formula W=Fnetd to calculate the work done on an object? Describe 2 requirements. What conditions would an applied force increase and decrese the energy of any object.

45. physical science

As the number of carbon atoms in the compound increases, what pattern do you see in the boiling points? What general pattern do you see in the melting points?

46. Healthcare

What current issues affect positive communication in health care organizations today?

47. SOCIAL STUDIES

AFTER THE REVOLUTIONARY WAR,WHAT HAPPENED TO THE COLONISTS

49. Algebra 1

7) Use cummutative law to find an equivalent expression. 73+yz Answer: 73(y+z) I know this one is wrong but I cannot figure out how to do the problem. 8) Simplify 6[5-9(3-1] Answer: -70 10)The formula b=30a is used in New England to estimate the minimum

50. math

a diver dives to 84m. If the diver rises 5 meters per min for 10 min. Where is the diver in relation to the surface. The answer would be 34 meters right?

51. math

8gal 7qt minus 5gal 2qt= 6gal 1qt Is this right

52. math

5.is 3.671 less than 3.67 yes 6.A triangle has a base of 13 feet and an altitude of 7 feet. Find its area. 45.5 7.find the best buy on cashews a.12oz for \$5.39 b.1lb4oz for \$7.39 c.10oz for \$4.89 d.1lb for \$6.39 A. 12oz for \$5.39 8.8gal7qt+3gal2qt= 6gal1qt

53. math

Someone please check my answers 1.In the number 854,263,189 what number tells the number of millions. 4 2.Write 4x4x4x4x4 as a power of 4 4^5 3.write 684 in expanded form 600+80+4 4.Turner agrees to buy a boat for \$2,800 down and \$129 a month for 48

54. math

-21-(-21)= would this be 0 or 42

55. Social Studies

What kind of climate occurs in most places near the equator

56. Social Studies

Are hurricanes an example of climates or weather?

57. Social Studies

Why are climates near the poles different from climates near the equator?

58. Finite math Probability

Classical probability of an event is a real number between 0 and 1, where 0 means: a. event is not given b. it will always happen c. it will never happen d. answer choice not given e. the choices are always not equal

59. Finite math Probability

Find the probability of obtaining exactly one tails when flipping four coins

60. Calculus I

Hello! I am taking Calculus I and am in Sec. 4.3 of Stewart's 7th Edition. I ran across a problem that I don't understand the mechanics of, could someone show me? Thanks a bunch! For what values of the numbers a and b does the function f(x)= axe^{b(x^2)}

61. Calc I

I'm a little confused about this one, it seems different from the rest of our homework! Could someone give me some hints? Thank you! Find the first and second derivative of the function. Check to see that your answers are reasonable by comparing the graphs

62. Calculus

I've been having a hard time with these lately... could someone explain it to me? Find f '(a). f(x) = (3x^2 − 3x + 4)

63. Calculus, Limits

Find the limit. lim t → ∞ (sqrt t + t^2)/(6t − t^2)

64. Trigonometry

If Hello, I have been working on this one problem for a while now and my professor is on vacation. Could someone give me a point in the right direction? Question: If sin x = 2/3 and sec y = 5/3, where x and y lie between 0 and π/2, evaluate sin(x + y). My

65. math

Three hundred twelve viewers were asked if they were satisfied with TV coverage of a recent disaster. Gender Female Male Satisfied 90 53 Not Satisfied 124 45 (a) Find P(satisfied). (Give your answer correct to two decimal places.) (b) Find P(satisfied |

66. Math

A single die is rolled. (a) What is the probability that the number on top is a 3. (Give your answer correct to two decimal places.) (b) What is the probability that the number on top is an odd number. (Give your answer correct to two decimal places.) (c)

67. english 125

identify at least one major similarity and one major difference between the forms of the short story and the poem.

What federal agency produces a report projecting healthcare expenditures for the coming decade?

69. algebra

how do you subtract 7.9 from 21

70. math

How do you find out what percent one number is of another?

71. Healthcare

What current issues affect positive communication in health care organizations today?

72. Healthcare

What current issues affect positive communication in health care organizations today?

73. statistics

in certain manufacturing processes parts must be machined tonwithin specified tolerences. the parts must have a mean length of of six inches plus or minus 0.26 inches .A SAMPLING PROCEDURE HAS BEEN ESTABLISHED to determine wether the ten parts are within

74. m

Solve for d C=9d answer: d= -C+9

75. math

Solve by multiplication principle -2x is greater than 1/9 answer: x is greater than -1/18

76. math

x=-2 does not have a slope does it?

77. math

Could someone please check these for me? 1. Find the function value if x=2 f(x)=x^3 F(2)=8

78. algebra

find the slope of (-4,-4) (3,-4) I came out with 0/2 so how would i type the answer

10)The formula b=30a is used in New England to estimate the minimum furnace output, b, in BTU's for a modern house with a square feet of flooring. A) determine the minimum furnace output for a 2100 ft squared modern house. B) solve formula for a Answer:a)

80. Algebra 1

7)use cummutative law to find and equivalent expression 73+yz answer: I don't even know where to start with this one

81. Algebra 1

10)The formula b=30a is used in New England to estimate the minimum furnace output, b, in BTU's for a modern house with a square feet of flooring. A) determine the minimum furnace output for a 2100 ft squared modern house. B) solve formula for a Answer:a)

82. algebra

find -x when x -92/29 wouldn't this be 92/29

83. math

I do not even know where to start with this one, can someone help? the peak of a mountain is 19,340 ft above sea level. what is the integer that best expresses the given number?

84. math

4. If 1 gallon of water weighs 8.34lbs, how much does 3.75 gallons weigh? 31.275lbs

85. math

Turner agrees to buy a boat for \$2,800 down and \$129 a month for 48 months. What is the total cost of the boat? \$8,992 This would be 129x48=6192+2800=8992 Right?

86. math

find the reciprocal of (-1/5)(15)=

87. Art

I have looked almost everywhere on the inernet but i cant find any art websites that will show me step-by-step how to draw a school cafeteria do you all kno any websites that i can go to

89. math

Samantha’s speedometer reads in kilometers per hour. If the legal speed limit is 55 mi/h, how fast can she drive?

90. math

The United States emitted 19.5 million t of nitrogen oxides (NO) into the atmosphere in 1987. One metric ton (1 t) equals 1,000 kg. How many kilograms of NO were emitted to the atmosphere in the United States during 1987?

91. math

Mark uses 1 pt 9 fl oz and then 2 pt 10 fl oz from a container of film developer that holds 3 qt. How much of the developer remains?

92. math

A school had 900 students at the start of a school year. If there is an enrollment increase of 7% by the beginning of the next year, what is the new enrollment?

93. cells - science

I need to make a 3-d cell. animal or plant.how do i do that and what materials do i need.not edible

1. Science

cast fossil

posted on November 27, 2018
2. Finite math Probability

I think the answer is C (it will never happen); but can you get me on the right path?

posted on June 2, 2018
3. English

Reggie, computer, store. I think that’s all :) \$700 might be one though!

posted on February 21, 2018
4. World Civilization

this is the least helpful way of obtaining guidance ever. Find the freaking answers.

posted on June 7, 2017
5. Analytical Chemistry

I'm really sorry, but I still don't understand how all the amounts relate to each other, and I am about at my wits end. I'm not very good at math, but I am normally pretty good at chemistry and problem solving, and I don't know why I still don't get this.

posted on June 5, 2016
6. Calculus I

That was so helpful!! I appreciate you writing all that out, thank you very much!

posted on June 27, 2014
7. Calculus, Limits

Thank you! That was a huge help!

posted on January 20, 2014