1. chem

In a solution prepared by mixing CH3OH with H2O the major species pesent are 1. a. CH3+, OH, and H2O 2. b. CH3O, H+, and H2O 3. c. CH3OH and H2O 4. d. CH3OH, H+, and OH I know i have to get an equation having trouble doing that!! please help!!

2. chemistry

Use the appropriate values of Ksp and Kf to find the equilibrium constant for the following reaction: PbCl2(s)+ 3OH(aq) >> Pb(OH)3 (aq) + 2Cl(aq). ksp for PbCl2 is 1.17*10^-5 kf for complex ion is 8*10^13. anyways...I know that the dissociation of the

3. Chem

Balance the chemical equation given below, and determine the number of grams of MgO needed to produce 15.0 g of Fe2O3. _MgO(s)+_Fe(s)->_Fe2O3(s)+_Mg(s) 1. a. 11.4 g 2. b. 3.78 g 3. c. 1.26 g 4. d. 0.0877 g I got equation balanced 3,2,1,3 just having

4. Science 8

The question is "Explain the difference between a filament and a photophore." I know that a photophore is a machine that an optomitrist uses to find your prescription for glasses, but I am not sure what a filament means. Please Help!

5. Science/ Biology 8

There is a question in my science textbook and no where in the textbook can I find the answer- neither can I find the answer on the internet. The question is: "If you shine a flashlight in a dark room and sprinkle talcum powder in front of the flashlight,

6. physics

Find the distance (measured in earth radii, RE) from the center of the earth to a point outside the earth where the acceleration of gravity due to the earth is exactly one ninth of its value on the surface of the earth.

7. Chemistry

Hi! So, I thought I was very comfortable with distinguishing among Arrhenius, Bronsted-Lowry, and Lewis acids and bases. But then, I answered this question wrong and am looking for help because I'm not sure if my "second choice" answer is correct. The

8. Chemistry

Having some confusion with this question....I have the answers, just not able to reach them. A flask of volume 5L is evacuated and 43.8 g of solid N2O4 is introduced at 77K. The sample is then warmed to 298K during which the N2O4 vaporizes and some

9. Math

Q.1)If one zero of the polynomial 3x2-kx-2 is 2 find the other zero.allso find the value of k. Q.2)If sum of the zeroes of the polynomial x2-x-k(2x-1) is 0,find the value of k Q.3)If 2 and 3 are the zeroes of the polynomial 3x2-2kx+2m find the values of k

10. Chemistry

2NO(g) + O2(g) --> 2NO2(g) Derive the theoretical rate law and indicate whether or not this is a possible mechanism for the above reaction: (1) 2NO(g) * N2O2(g) (fast) (2) N2O2(g) + O2(g) --> 2NO2(g) (slow) * indicates equilibrium arrows Thank you!

11. Math

What ratio represents the probability of drawing a red card from a standard deck of 52 cards?

13. physics

A 22 kg sphere is at the origin and a 12 kg sphere is at (x, y) = ( 22 cm , 0 cm) At what point or points could you place a small mass such that the net gravitational force on it due to the spheres is zero? please show all of work...i don't get it

14. Chem

Given the following hypothetical reaction: 2 E(g) + F(g) + G(g) products. If the rate law is: Rate = k[E]2[F]-1, what is the overall order of reaction? 1. a. zero 2. b. first 3. c. second 4. d. third

15. MATH: PROBABILITIES

You ask a neighbor to water a sickly plant while you are on vacation. Without water the plant will die with probability 0.85. With water it will die with probability 0.55. You are 89 % certain the neighbor will remember to water the plant. You come back

16. math

A boat's crew rowed 12 miles downstream, with the current, in 1.5 hours. The return trip upstream, against the current covered the same distance, but took 4 hours. Find the crew's rowing rate in still water and the rate of the current... The crew's rowing

17. Chemistry

Which element can form more than one kind of monatomic ion? 1. a. Se 2. b. Sn 3. c. S 4. d. Sr

18. chemistry

2H2O(l)=2H2(g) +O2(g) the stress is an increase in pressure. If there is an increase in pressure, the reaction would go to the side of fewer moles. Even though the left side has no moles of gas, is the result still shifting to the left

19. Math

A painter working at 100 feet from the ground, drops his paint brush onto the street below. The function, s(t)=-16t^2+100, gives the height(in feet) of the paint brush as it falls to the ground. The velocity at time t=2 seconds is given by lim

20. algebra

im bad at rounding number, what is 10.81665383 round to the nearest thousandth

21. English

1. Join one section of the pipe to the next. 2. Join one section of pipe to the next. (Do we have to use 'the' or not? Which one is correct?)

22. finance

Brown Enterprises’ bonds currently sell for \$1,025. They have a 9-year maturity, an annual coupon of \$80, and a par value of \$1,000. What is their current yield?

23. Math

If the area of triangle wxy is 22 square inches what is the area of wxyz

24. Physics

A brass wire with Young's modulus of 9.20 1010 Pa is 2.5 m long and has a cross-sectional area of 4.6 mm2. If a weight of 5.2 kN is hung from the wire, by how much does it stretch?

Is light transmitted through frosted glass? Explain Please!

26. calculus

Triangle ABC is an equalateral triangle, with O it's centroid. a) Show that vector OA + vector OB + vector OC = vector 0

27. Statistics

The annual Salary of an electrical engineer is given in terms of the years of experience by the table below. Find the equation of linear regression for the above data and obtain the expected salary for an engineer with 45 years of experience. Round to the

28. Algebra

solve by substitution method y=x-4 6x-9y=21

29. finance

Calculate the rate of interest compounded yearly (j) equivalent to 8% pa compounded quarterly. Give your answer as a percentage per annum to 3 decimal places.

30. MATH

The 120-foot rope is cut into 3 pieces.The first of rope is twice as long as the second piece of rope.The third piece of rope is three times as long as the second piece of rope.What is length of the longest piece of rope.

31. english

What does this critical lens quote mean? "Man is the only animal that blushes or has need to".

32. Trig

What are some real life applications of logarithims?

33. physics

Two parallel wires carry currents I1=100A and I2 (they run in the same direction). The top wire is held in position; the bottom wire is prevented from moving sideways but can slide up and down without friction. if the wires have a mass of 10g/meter of

34. latin

Looking for Latin version of “History is the witness that testifies to the passing of time; it illumines reality, vitalizes memory, provides guidance in daily life, and brings us tidings of antiquity.” Marcus Tullius Cicero 106-43 B.C., “Pro Publio

35. I REALLY NEED YOUR HELP!!!!

"Various theories have been proposed to explain its origin and characteristics, focusing on an assortment of factors, including the social and civic peculiarities of Florence at this time including its political structure and the patronage of its dominant

36. Data Management gr. 12

I am so confused about correlation equations. I don't know at all how to use them r= W (x-xXy-y)=Sxy __________________ n *the equation doesnt look exactly like this but it is similar, if i can get any help at all that would be great example question:

37. Global History

How was trade important to the economic development of Western Europe, the United States, and Japan during the postwar decades?

38. calculus

Prove that the sum of the vectors from the vertices to the centre of a regular octogon is a zero vector.

39. Chemistry

Could someone walk me through this problem? 6CO2 + 6H2O --> C6H12O6 + 6O2 partial pressure of CO2 is .26Torr, temp is 25 celsius, calculate volume of air to prouduce 10g glucose I keep getting confused with stoichiometry....my thinking: convert 10 g

40. HUM/205

Select one artwork that expresses a human experience you have encountered in your own life.

41. Chemistry

A solution of vinegar is 4.96% by mass acetic acid in water. Assume the density of the solution is 1g/mL. What is the pH? I have calculated the molar mass of acetic acid to be 60.5

The question is: "A flashlight does not lose power as you walk away from it, but as you get farther and farther away, it appears to be less and less bright. Explain" First of all I am BAD at explaining things, and when you don't know the answer it is even

43. economics

Given the business situation of Mrs. Acres Homemade Pies (p. 30) and using the economic concepts of supply and demand, explain 1) Discuss what you think will happen to the supply, demand and price of the product in the short-term; 2) Discuss what you think

I Only Need Question 3. I have completed the rest. I have had several solutions and cannot come up with an answer. Thank you! Envision that you have served as business manager of Media World for over 2 years. You have noticed that for the last 12 months

45. lal

how to say FUN in a PLURAL way my sentence is fundraising is the easiest and (fun) way in school

I know that this seems like a REALLY EASY question, but for some reason I cannot think of anything! 2. What technologies have been developed that use light? This is from a grade 8 textbook, so nothing to technical!

47. To DrBob222

Can you please explain thoroughly to me about all this. Why do we criss cross the formulas of compounds? How do we find out which combining capacity to use if there are more than one? Is there a special formula we use to find out or something? I really do

48. chemistry

What is the pH of the solution created by combining 12.00 mL of the 0.10 M NaOH with 8.00 mL of the 0.10 M HC2H3O2?

49. chemistry

What is the pH of the solution created by combining 8.00 mL of the 0.10 M NH3 with 8.00 mL of the 0.10 M HCl? I found their moles= 8*10^(-4)

50. gr.8 math

last year Stephanie was paid a base salary of \$12,000/ year plus a commission of 3% on the total dollar value of her sales. She sold \$1,120,000 worth of company products. How much did she make?

51. Global History

How was the economic development of western Europe during the Cold War years similiar ro or different from that of Japan?

52. Math

What ratio represents the probability of drawing a red card from a standard deck of 52 cards?

53. Literacy

what are the components of a successful literacy program?

54. math

Solve for x: (4x + 1)1/2 = 3

55. Algebra

How do you solve and graph these equations? y = 4x + 5 x - 2y = 4

56. economics

True or false: If the human capital possessed by two workers is nearly the same, their wag rates will be nearly the same. Explain.

57. math

what is the antiderivative of 1/4sinx+3cosx

58. English

Hello everyone! Can you write me some ideas about: "Being a surgeon is a stressfull job." i coulkd really use some help and also ideas about solve tis problem=stress. So what could eg a surgeon do to be /more relaxed? thank you!

59. English

1. What did you think about the movie? - I thought it ws very sad. I cried a lot. 2. Which did you think about the movie? - I thought it was very violent. 3. When did you think about the movie? - Yesterday I thought about the movie. 4. How did you think

60. math

What is the relevance of the order of operations in simplifying a polynomial?

61. world geography

how did colonialism affect the underdevelopment of Latin America?

62. Math

For the function x^2 + 2x - 4 , find lim f(h+4) - f(4) / h h-->0

63. Social Studies 8

"Various theories have been proposed to explain its origin and characteristics, focusing on an assortment of factors, including the social and civic peculiarities of Florence at this time including its political structure and the patronage of its dominant

64. chemistry

Solution A, while in a 1.0 cm cell, has an absorbance of 0.390 and a [Cu2+] = 0.0283 M. Then, 6.57 mL of solution A is diluted with pure water to 100.0 mL. What is the absorbance of this diluted solution? I tried but I still don't get it. Can anyone please

65. What does PATRONIZED mean?

Look at above question

66. Marketing

the observing method in marketing research

67. Probability

Probability of drug companies obtainining permission for sale og a drg within 90 days is .75. If a sample of 5 compnanies selected what is the probability that none of them obtaine permission within 90 days.

68. Trig

What are some real life applications of logarithims?

69. plants

there are mechanisms that prevent pollination of one plant species by pollen from another. this would prevent a) the formation of hybrids between the pollen donor and the pollen receptor b) a waste of pollen c) pollen from attempting to develop on the

70. marketing

Several companies use their brand as a competitive advantage. Given your knowledge about the global economy, which brands do you believe have the strongest liklihood of remaining a source of advantage in the 21st century? Why? What effects do you believe

71. Homework ( English)

i must make a police report of the murder from Patick Maloney the question is; imagine that you are one of the defective who is investigating of Patrick Maloney?

72. College Intermediate Algebra

Explain the reason to use tradional solving with a quadratic equation with one variable.

73. Algebra

y^2 + 1/4 = -y how do i do this??? I'm stuck

74. pre algebra

A customer wants to make a teepee in his backyard for his children he plans to use lengths of PVC plumbing pipe for the supports on the teepee and he wants the teepee to be 12 feet across and 8 feet tall how long should the pieces of PVC plumbing pipe be

75. HUM/205

To what human experience does the work relate? O How is that human experience meaningful to your life? O How does the work express or relate to your human experience? O What social, cultural, and moral values does the work express

76. college math

Cindy deposited \$1,000 in an account that pays 12% interest compounded quarterly. How much money will Cindy have in the account after 7 years?

77. To Writeacher

Writeacher, I fixed some things in here, but I know that there are still a few mistakes in here. I think it's with the intro and the ending. Could you please check it for me, and tell what I need to do to make it better. I'll keep on working on it, till

78. 8 math

This year Stephanie's commission rate will be cut to2.8%, but her base salary will be raised to \$14,000 per year. Should she be concerned? What would the difference in her salary have been if this pan had been in place last year?

79. algebra

Give exact and approximate solutions to three decimal places x^2+18x+81=1

80. Math, 11

okay so i am trying to model a cubic equation to fit my curve my base curve is specifications: x value-0 to 6.19 amplitude-0.77 amplitude coordinates-3.73,0.77 x intercepts-0,0 and 6.19 , 0 this is my curve and i have to make a equation and include

81. Nutrition

What is the difference between simple and complex carbohydrates?

82. math

how do i ,prove: 1/(sec x-1) + 1/(sec x-1)= 2cotx cscx

83. math

how do i ,prove: 1/(sec x-1) + 1/(sec x-1)= 2cotx cscx

84. BIO.

What is a karyotype? What type of information can be obtained from it?

85. world geography

how is Central America different from the Carribean? how is it similar? (location, geography, resources, culture, etc)

Why is diffusion insufficient to meet the oxygen requirement of multicellulars like us?

87. English

Write a passage using rhetorical device on a person, idea or ideology(300 words)

88. math

what is x for tanx=2/3 in radian

89. algebra

Explain how you would find 4 minus 3 5/6.Justify your steps by using a model.

90. To Writeacher

Writeacher I added more at the end, and I fixed some mistakes of mine. I can still feel that there are some awkward places in here, but I can't tell where they are located. I tried to make my ending strong, by speaking from my heart. I wrote what I think

91. Accouting

I need to prepare a multi-step income statement for Coyote, Inc from a single-step statement. Thuis is the following information that I was given. Net sales \$1,833,000 Interest Income 13,000 __________ 1,846,000 Costs and expenses Cost of goods sold

92. Physics

3000 Joules of energy in the form of heat are added to a copper block with a mass of 1 kg. What is the blocks temperature change?

93. chemistry

when naming alkyl halides with more than one kind of halogen, do u name alphabetically or according to reactivity.

94. calculus

Consider the infinite series of the form: (+/-)3(+/-)1(+/-)(1/3)(+/-)(1/9)(+/-)(1/27)(+/-)...(+/-)(1/3^n)(+/-)... (A) Find x and y from: x(

95. human resources

challenge facing human resources planning

96. algebra

How do you find any x-intercepts and y-intercepts. If no x-intercepts exist, state this. g(x)=2x^2+3x-1

97. geometry

the ratio of juniors to seniors is 9 to 8, if there are 51 juniors and seniors total, which percent of students are seniors? how do i figure this out?!

How do meteorologists forecast weather?

99. algebra

the accumulated value of an investment of \$15,00 for 7 years at rate of 4.5% compounded semiannually what will that be?

100. statistics

The first class in a relative frequency table is 50–59 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate?

101. Jan Mann Opportunity School

three bases on a tRNA molecule that complement an mRNA codon

102. English

Hello everybody! I've got some problems with my english homework,and I'd really appreciate our help! My homework is : name a stressfull job eg.:doctor,manager than describe why this job is so stresfull,what can be the causers of sress.Why is this bad if

103. English

Can you please check the following sentences, please? Thank you very much. 1) As the letters are written in first-person, they provide different individual points of view on the same event, which can be fully explored. 2) Then, the characters introduce one

104. Math

how do I write a rule for this function? x: -4, 0, 2, 4 f(x): 4, 6, 7, 8

105. Accounting

Target corp is currently seeking additional capital to expand it's operation. Two companies have shown interset. The first company would like to have part ownership. Company 2 would like to provide target with a loan. Write a memo in which you explain what

106. AED

What are social factors?

107. AED

What are social factors?

108. Algebra

solve and graph each function: 2x = 3y y = 2x + 4

109. image editing

Hi... a huge challenge for me, utilizing the software Photoshop 4, is to balance graphics and text without looking tacky. Any ideas????

110. Psych

Bipolar 1 disorder and bipolar 2 disorder differ with regards to a.whether they include full-blown manic phases b.whether they develop suddenly at an early age or gradually at a later age i think it is A because I know that type 1 is classified by having

111. English

1. What do you think about the musical? 2. How do you think about the musical? (#1 is right, but #2 is wrong? Am I right? Why is #2 ungrammatical?)

112. English

1. This path leads to the main road near the trees. 2. This path joins the main road near the trees. (Are both the same?)

113. Math

2+2

Help! I have had several solutions and cannot come up with an answer. Thank you! Envision that you have served as business manager of Media World for over 2 years. You have noticed that for the last 12 months the business has regularly had cash assets of

115. government

what can political parties handle better than interest groups? a. raising money b. provide solidary benefits c. create a cleare ideology d. organize people on a large scale

116. Math

solve for g. 0=2,750,000g - 2,750,000

117. quick bio question

What are autosomes?

118. spanish

el camarero te comunica los problemas

119. math

how do do you find the percentage of \$38676?

120. Math

\$20768 the percentage for this is 21% please help me through the formula on how this is done get 21%

121. maths

how many is 1kg= how many gram

5+9+2/6-8*7

123. Biology Gr. 11

Indicate how a female could inherit complete red-green colour blindness

124. math

what is x for tanx=2/3

125. math

0 = x (x - 6.19) (x - s) if you have that, and you wanna find that last zero (root) how do you do it?

126. college algebra

Explain how to identify intervals on which a function increases, decreases, or is constant.

127. integration

How do you integrate ; ln(lnx) and x/lnx

128. science

what are the pros and cons of laser eye surgery? atleast 5 of each pro and con plz need help urgently thanku

129. science

Which would be more liquidlike: magma that flows easily or magma that flows difficult?

130. history

Why did relations between the superpowers change in the years 1962-75

131. chemistry

Explain how the use of masses, while not a component of Boyle's law, is related to the law.