Questions Asked onApril 30, 2010

1. General chemistry

A solution of LiCl in water is 18.0 wt% LiCl. What is the mole fraction of LiCl?

2. Math

plot the point given in polar coordinates and find the corresponding rectangular coordinates for the point. (-1 , -3pi/4) I do not understand.

3. trig

please help me. use trig. identities to find the exact value. tan 25° + tan 5° / 1- tan 25° tan 5°

4. college physics

Sirius is about 9.0 light-years from Earth. To reach the star by spaceship in 10 years (ship time), how fast must you travel? How long would the trip take according to an Earth-based observer? How far is the trip according to you?

5. Chemistry

How many milliliters of a stock solution of 2.00 M KNO3 would you need to prepare 250 mL of 0.150 M KNO3? Please show work.

6. dressmaking and design

A client tries on a skirt you check the side seams they curve toward the back what does this indicate?

7. TRIG

Use the cofunction of a complementary angle. PLEASE HELP ME! tan θ = cot (30° + 5θ)

8. psychology

Can I please have some information to help me discuss this question beloww: Analyze at lease two research methods used for uncovering basic emotions

9. chemistry

A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and occupies a volume of 5.70 L. (a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.75 atm while the temperature is held constant. (b) Use

10. science

if i weigh 100 lbs on earth how much would i weigh on halley's comet?

11. Physics

When an automobile moves over a wide, closed loop of wire embedded in a road surface, the magnetic field of the Earth within the loop altered? Is a pulse of current produced? Can you cite a practical application for this at a traffic intersection?

12. Algebra 2

Find the solution of the exponential form in terms of logarithms 2^(2x+13) = 3^(x-45)

13. Chemistry

I know that benzaldehyde decomposes into benzoic acid and benzyl alcohol via Cannizzaro Reaction.. But, can benzyl alcohol go through a Cannizzaro Reaction to form benzaldehyde and benzoic acid?

14. chemistry

magine that you have a 7.00 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm, to what

15. chemistry

When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction \rm CaCO_3{\it(s)}\rightarrow CaO{\it(s)}+CO_2{\it(g)} How many grams of calcium carbonate are needed to produce 53.0 L of carbon dioxide at STP?

16. chemistry-science

A 500 ml buffer solution contains .2M Acetic acid and .3M sodium acetate. Find the pH of the buffer solution after adding 20 ml of 1M NaOH, what is the pH? (pka = 4.74)

17. Economics

Define table laying and state the importance of table laying

18. math

A straight line AB of length 10 units is free to move with its ends on the axes. Find the locus of a point P on the line at a distance of 3 units from the end on the x axis.

19. Chemistry

How many mL of 18 M H2SO4 are required to react with 250 mL of 2.50 M Al(OH)3 if the products are aluminum sulfate and water? How do i solve this?

what it he reason a spoon gets hot when put in a bowl of hot soup?

21. College Physics

An electron travels at a speed of 0.700c. What is its kinetic and total energy? I got, but this is not right. K , E =3.27×10−14,1.14×10−13 J Thanks for your help

22. Intermediate Algebra

Solve 6x=5-9 6x=-4 x=-2/3

asked by Rose Kendrick

in sierra leone and liberia, many WHAT have to leave their homes because of civil wars?

30% of the people in kenya suffer from malnutrition because they grow WHAT and WHAT?

25. Parabola Help

by plotting the graph of parabola y=2+3x-2x^2 which 3 option are true 1) the graph is the same as that of y=6+9x-6x^2 2)the parabola has a minimum point 3)the gradient of the parabola at x=2 is 0 4)the graphy=2+3x-2x^2crosses the x-axis at the same point

26. Math

here are some fractions : 3/9, 8/9, 7/9, 4/9, 2/9, 5/9, 6/9 If I were to put them in the order of the greatest, what order does that mean and how did you work that out?

27. Math

How do you know which one is the greatest? and why please? 7/8 or 1/2

28. Math

I need to graph the polar equation 3 + 3cosQ and i need to create a table of values for r and Q. Could someone please explain how I would do this? Thank you!

29. visual images and how to use them

Logical fallacies tend to be ____________________. nonexistent in visual arguments more common in verbal arguments than in visual arguments and often harder to detect more common in visual arguments than in verbal arguments and often harder to detect

30. algebra

Bayside insurance offers two health plans. Under plan a, Giselle would have to pay the first $200.00 or hre medical bills, plus 30% of the rest. Under plan B, Giselle would pay the fist$210.00, but only 20% of the rest. For what amount of medical bills

31. Chemistry

What is the molarity of a solution that contains 0.30 moles of KBr in 400 mL of solution. Please show all work

32. Chemistry

What is the molarity of a potassium chloride solution that has a volumeof 400.0 mL and contains 85.0 g KCl? Please show work.

33. Accounting

How does one determine variance analysis? I am trying to understand this and my text book is confusing me. Also, to determine this, would one find the the answers in the balance sheet or cash flow statement, or from the revenue and expenses?

34. Math

so with 4/8 and 7/8is 7/8 greater or less than 4/8 and why?

35. Math

How do I solve this equation 4n^2-25=0

36. Intermediate Algebra

Solve this please 5=6x=9 6x=5-9 6x=-4 x=-2/3

37. math (parabola)

Hi, the question is: Write the equation of the parabola with vertex(3,-1) and x-intercepts 2 and 4. I did this: y=?(x-3)^2-1 How to find the a-value? Many thanks, and I appreciate any answer!

38. Science

How is the kinetic-molecular theory related to specific heat, joules, and calories??

39. EA

Anyone else working on An overview of teaching techniques study unit???

40. Math

find the solution of the expontetial equation 1+7^(5x)=19

41. earth science

which type of mountyain is found on island arcs?

42. algebra

which point is a solution of the inequality y > -3x + 1? a) (2,-1) b) (0,-1) c) (0,0) d) (-12,4)

43. algebra

which point is a solution of the inequality y

44. Chemistry

what particle is emitted from the nucleus during a proton and neutron decay?

45. college

propose a health intervention aimed at eliminating health inequities

46. Vectors

The vector x and y are the lenght of 3units(they both have a magnitude of 3). If the magnitude of( vectorx + vector y)= root 17, determine the magnitude of (vector x- vector y)

47. Social

Hi i have 2 weeks to write a paper about anything related to marketing. It has to be 7 pages so I need a good topic and a place to find solid information (our teacher said don't use wikipedia at all because he hates it). I was wondering if you could help

48. Intermediate Algebra

Used ASCII Character Solve for X 5=6x+ 6x=5-9 6x=-4 x=-2/3

49. Chemistry

What is the molal concentration of an aqueous calcium chloride solution that freezes at -2.43 degrees Celsius?

50. Math

(9/5) log base 5 (x) = -1

51. Science

I just learned about binomial nomenclature and taxonomy. Where can I find a database of every single species in the world?

52. Math

2^(2x+13) = 3^(x-45)

53. Trig.

I really need help so please help. write the first trigonometric function in terms of the second trigonometric function. sec x; tan x

54. Intermediate Algebra

How are polynomials factored by grouping? Explain and give example

55. English 122 Composition II

Discuss any areas related to citing sources that you find confusing or difficult to understand or apply.

56. health

not really homework but just not getting answers to all my questions so in short.If an individual suffering from Alzheimer's Disease or other related dementia is content within their environment does that individual have "quality of life" or do you think

57. statistics

Why is the population shape a concern when estimating a mean? What effect does sample size, n, have on the estimate of the mean? Is it possible to normalize the data when the population shape has a known skew? How would you demonstrate the central limit

58. statistics

What do confidence intervals represent? What is the most controllable method of increasing the precision of or narrowing the confidence interval? What percentage of times will the mean, or population proportion, not be found within the confidence interval?

59. Social Studies

This is kind of a weird question, but, I need to do a Medieval ABC book, and right now I'm at E. And I need to draw a picture for the word. My word is "excommunication". But I'm not sure how I could draw a picture of that?

60. Algebra

22. State the domain of the function y=3x+2 a. D: Real numbers b. D: x not equal to 0 c. D: x < 0 A? 23. State the range of the function y=2x^2 a. R: y greater than or equal to 0 b. R: x not equal to 0 c. R: y < 0 I'm not sure? 24. Is y=sqrt2x a function?

61. Math

Solve each equation: 5 over 2x-5 minus 4/5= 1 over 2x-5

62. Math

Solve each equation: Thank you 5-x over 3 minus x-2 over 4 = 5/12

63. Intermediate Algebra

How are Polynomials factored by grouping? Explain and give example.

64. Personal Finance

Mary and Joe would like to save up $10,000 by the end of three years from now to buy new furniture for their home. They currently have$1500 in a savings account set aside for the furniture. They would like to make three equal year end deposits to this

65. math quick?

5 over 2x-5 minus 4 over 5= 1 over 2x-5 I have a quick question... what would i multiply by? I know how to do the rest of the problem. Thank you

66. To Writeacher

Writeacher. Could you please edit this for me, and point out all grammatical errors. Thank you very much in return :-) Mr. Henry Axhelm Math Period 2, Room 107 I teach five classes a day, Not students, just classes. No sense getting involved With their

67. Physics

How much work (in J) must be done to lift a stack of bricks, which has a mass of 600 kg, from the ground to a height of 15 m? Acceleration due to gravity is 10 m/s2

How do you write a positive message for a business that is going to have less work days and shorter hours?

69. Physics

How much work (in J) is done to accelerate a car which has a mass of 3300 kg from a speed of 7 m/s to a speed of 16 m/s?

70. Human relations

I need help on OSHA what this organization is for, their duties, who they report too, and what organizations are affected by OSHA. Thanks in advance Do supply resource(s)

71. To Writeacher

I posted this on here before as well, just to heasr from people if it sounds good, but I'd like to get it edited from you. Can you please check to see if my sentences make sense, and point out any grammatical errors. Thank you very much for all your

72. Physics

A cable lifts a 1200 kg elevator at a constant velocity for a distance of 34.5 m. What is the work done by the tension in the cable.

73. Math

how do i solveseparable differential equation 7x−4y sqrt(x^2+1) dxdy=0 Subject to the initial condition: y(0)=−10

74. Physics

A person pulls a toboggan for a distance of 37.2 m along the snow with a rope directed 25.4° above the snow. The tension in the rope is 84.1 N. How much work is done on the toboggan by the tension force?

75. Physics

A 0.0730 kg arrow is fired horizontally. The bowstring exerts an average force of 60.4 N on the arrow over a distance of 0.894 m. With what speed does the arrow leave the bow?

76. English

(telephone call) Hello. May I speak to Tony? 1. - Who's calling, please? 2. - Who's speaking, please? (Which one do we have to use? Are both OK?)

77. math

How Many pounds of acid per inch? If you have a tank of 51ft long by 4ft 7in wide, and need to fill it to the two inch mark with hydrochloric acid, how many pounds are you putting in it? (Hint 1 gallon of acid weights 9.8 lbs. Nancy 2:28

78. English

1. Do you live around here? 2. Do you live near here? 3. Do you live in here? (Are they all grammatical? #1 is the same as #2? #3 is a little different, right?)

79. chemistry

you have 2.0 grams of water at 0 degrees Celcius. how many kilojules of heat will freez it?

80. college

explain what happens when i drink and eat chai tea and mixed berry scone. topic is expected to cover activation of visual, taste, olfactory receptors. thirst mechanist, digestion, absorption, effects of increased volume of blood pressure; including effects

81. accounting

The transaction would decrease one liability account and increase another liability account

82. trig

can someone please help me with this problem. i'm doing my review right now and i'm stuck? Find cos(s + t) given that cos s = 1/3, with s in quadrant 1, and sin t = -1/2, with t in quadrant 4.

83. econ 460

1. The demand for a new drug is given by P = 4 – 0.5Q. The marginal cost of manufacturing the drug is constant and equal to \$1 per unit. (Prices and costs are in terms of dollars, and quantities are in millions). a. Illustrate on a diagram the following

84. Chemistry

A mixture containing the same number of moles of SO2 and O2 is placed in a 2L container at 900K. The initial pressure is 1.90Atm. A reaction occurs leading to the formation of SO3: 2SO3 + O2 2SO3 After equilibrium is established the TOTAL pressure drops to

85. computers

I have just started a basic class in programming and I am totally lost. Can someone help me out? I have to write pseudocodes and create flowchart and don't have a clue. I need help with the following: flowchart, pseudo-code, Input and Output variables, and

86. math

what is 135/180 as a grade

87. science/health

I need help with a few questions. Please let me know if my answers are correct or not and thank you. 1- The process of breaking a complex substance down into smaller components is called? A- neutralization B- metabolism C- anabolism D- catabolism Answer- C

88. English

1. I'd love to introcuce them to you. 2. I'd love to introduce to you them. 3. I'd love to introduce the people to you. 4. I'd love to introduce to you the people. 5. I'd love to introduce the people who are standing over there to you. 6. I'd love to

89. crt/205

How will thinking critically influence the way I process information?

90. chemistry lab

Insert your values for x, y, z, & n into KxFey(C2O4)z·nH2O and provide the correct coefficients to balance the following equation: ___ Fe(NH4)2(SO4)2·6H2O + ___ H2C2O4 + ___ K2C2O4 + ___ H2O2 ___ KxFey(C2O4)z·nH2O + ___ (NH4)2SO4 + ___ H2SO4 + ___ H2O

91. Probability

The public transport system is aware that one person in twenty does not buy a ticket for their trip. The manager decides to challenge 200 travelling people as to charger they have a valid ticket or not. (a) calculate the probabilty that everyone had a

92. trig

please help me. use trig. identities to find the exact value. tan 25° + tan 5° / 1- tan 25° tan 5°

93. Role Model

Hey, I have to do a peragraph on a person whom I consider to be my role model and my role model is my favourite actress Amrita Rao. Can all of you revise it for me? Amrita Rao is my role model because she like me believes in the philosophy that Life is

94. math

Solve the equation: Thank you 2/y + y-1/3y= 2/5

95. English

Are there any deeper ideas in Journey to the Center of the Earth by Jules Verne? i.e. irony, symbolism, or anything like that

96. math

I appreciate your help. This is the last problem that I need help with today. The answer is suppose to be -1/4 3x/x+1=5x over x-1 -2

97. chemistry(check my answer)

For the cell: C(s) C+(aq) B+(aq) B(s). Metal ______ is the "negative" electrode. is it C(s)

98. Biology

What is an ecological property? Would the Belize Barrier Reef Reserve System be an ecological property? Or would the Los Katios National Park be a better option?

99. accounting tutoring

these guys are very good in accounting tutoring

asked by Joseph Castillo
100. Statistics

Suppose a bag contains 7 red chips, 8 black chips, and 3 green chips. You draw two chips (without replacement) from the bag. Find the probability that you drew a red chip ﬁrst and then a black chip second.

101. social studies

still looking for more psychosocial challenges facing the old age.Or suggest sites for this.

102. math

can someone help me I am not understandng how to do this; Function k(x) = x+18 Find k(0) k(x) = 6x k(-2) k(5) k(-2) indicated outputs 2 F(x) = 4x - 5x

103. Chemistry

A zero-order reaction has a constant rate of 3.20×10^−4 M/s. If after 35.0 seconds the concentration has dropped to 9.00×10^2M , what was the initial concentration?

104. physics

A sample of monatomic gas (£^ = 5/3) is expanded adiabatically from an initial temperature, volume, and pressure of 230. ¢XC, 6.00 litres, and 5.00 kPa, respectively, to a final volume of 7.00 litres. (a) What is the final pressure of the gas? (b) How

105. math

Function k(x) = x+18 Find k(0) k(x) = 6x k(-2) k(5) k(-2) indicated outputs 2 F(x) = 4x - 5x I need help with these can anyone help?

106. Health

I need help with a few questions. Please let me know if my answers are correct or not and thank you. 1- The process of breaking a complex substance down into smaller components is called? A- neutralization B- metabolism C- anabolism D- catabolism Answer- C

107. Accounting

The general manager of a business encounter many types of business transaction provide an example of a transaction?

108. Music

I just composed a song and I need it on a music piece. I need help. I can supply the tonic solfa and would only need it in a piece. Thanks.

109. Math

What do these factor out too?? (3w^2+w)(-6w-2) (3y^2+y)(6y+2) (6y^2+2y)(-3y-1)

110. algebra

write a polynomial for the length of the rectangle: area is- 7xto the 4th power minus 14x. the width is 7x.

111. chemistry

A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and occupies a volume of 5.70 L. (a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.75 atm while the temperature is held constant. (b) Use

112. math

can any one explain why this integral diverges ? integration of [(e^(-sqrt(t)))/sqrt(t)]dt from 0 to infinity thanks

113. college engineering science

A shaft which rotates at 300r/min is uniformly accelerated to 600r/min in 15secs.Calculate: (a) The angular acceleration. (b) The angle through which the shaft has turned during the acceleration.

114. Math

5 to the second power - (3- 4 to the 3rd)

115. Math

0.3x+14.2=x-8.41

116. Math

10c(9c-1)-8=88c+10

117. Organic Chemistry

Hello there! I having trouble understanding the relationship between dipole moment and the heat of formation. How do these two relate; for instance, in the reduction of camphor to isoborneol and borneol? In addition, How does the dipole moment changing for

118. Math

-7/58y times 29y to the 2 power

119. Math

2x+y x=2/7 y=5/6

120. statistics

H0: ¦Ð ¡Ü .60 versus H1: ¦Ð > .60, ¦Á = .05, x = 56, n = 80 can someone just explain why alpha is there? Is it used?

121. Math

evaluate the expression 2x-3y-4z x=7 y=-3 z=-1

122. Math

How do you factor x^3-1? HELP

123. chemistry

Can you help me with the following: Calculate the pH that results when 25 mL of .1M HCL is titrated with .1M NaOH solution run in from a buret at each of the stages of volume of .1 M NaOH add in 5.0 mL incrememnts beginning with 0 mL of NaOH

125. Math

how i solve this two equations ib order to find alpha and beta 2=cos(alpha)+1.341cos(beta) 2=sin(alpha)-1.341sin(beta)