# Questions Asked onApril 6, 2012

1. ## Chemistry

A solution contains 0.0500 M Ca2 (aq) and 0.0350 M Ag (aq). What will be the concentration of Ca2 (aq) when Ag2SO4(s) begins to precipitate? What percentage of the Ca2 (aq) can be separated from the Ag (aq) by selective precipitation? -Solving the 1st one

2. ## Honors Chemistry

1. What is the pH of a solution whose [H3O+] is 1 X 10^ -5 M? 2. What is the [H3O+] concentration of a solution with a pH of 9? 3. What is the pH of a solution whose [H3O+] concentration is 3 X 10^-3 M? 4. What is the pH of a solution with a [H3O+]

3. ## maths

Given that f(x) =x^3-kx^2-2x+1 gives a remainder k when divided by x-k,find the value of k

4. ## physics

(a) Suppose a bimetallic strip is constructed of copper and steel strips of thickness 1.1 mm and length 29 mm, and the temperature of the strip is reduced by 5.1 K. Determine the radius of curvature of the cooled strip (the radius of curvature of the

5. ## AP CHEMISTRY

A voltaic cell is constructed that is based on the following reaction. Sn2+(aq) + Pb(s) -> Sn(s) + Pb2+(aq) (a) If the concentration of Sn2+ in the cathode half-cell is 1.80 M and the cell generates an emf of +0.219 V, what is the concentration of Pb2+ in

6. ## physics

A glass windowpane in a home is 0.62 cm thick and has dimensions of 1.30 m × 1.72 m. On a certain day, the indoor temperature is 26°C and the outdoor temperature is 0°C. (Assume the thermal conductivity of the glass is 0.8 J/s · m · °C.) (a) What is

7. ## Chemistry

A solution contains 0.0200 M Pb2 (aq) and 0.0200 M Sr2 (aq). If we add SO42–(aq), what will be the concentration of Pb2 (aq) when SrSO4(s) begins to precipitate?

8. ## grammar

There is not a book. There are not books. There is no orange. There are no oranges. There is no any book. There are no any books. There is not any book. There are not any books. Could you check to see which of the eight sentences above are right or wrong?

9. ## chemistry

Based on electronegativity values, which bond has the highest degree of ionic character: H--S Si--Cl Cs--Br?

10. ## Pre-calculus

Use the remainder theorem to find which of the following is not a factor of x3 + 12x2 + 47x + 60 the answer is x-5 but idk why

11. ## Math

The area of a rectangle is 189. The width is 2 meter longer than 1/3 the length. find the length and the width

12. ## pre-algebra 2

Twenty-five members of the eighth grade class at Park Center Middle School are going to a museum and then to lunch. Each student must pay an entrance fee to the museum and \$7.25 for lunch. The total cost for the trip is \$443.75. What is the entrance fee

13. ## Biology

If agglutination occurs when blood with a certain antigen and blood with the corresponding antibody mix, why is blood type O the universal donor? Wouldn't the A or B antibodies from the O type blood attack the blood antigens of the recipient and cause

14. ## physics

A 40-g block of ice is cooled to −71°C and is then added to 590 g of water in an 80-g copper calorimeter at a temperature of 27°C. Determine the final temperature of the system consisting of the ice, water, and calorimeter. (If not all the ice melts,

15. ## physics

A bubble located 0.200m beneath the surface of a glass of beer rises to the top.the air pressure at the top of the glass is 1.01(10^5)pa.assume that the density of beer is the same as that of fresh water at 4 degrees celcius.if the temperature and number

16. ## physics

(a) Suppose a bimetallic strip is constructed of copper and steel strips of thickness 1.1 mm and length 29 mm, and the temperature of the strip is reduced by 5.1 K. Determine the radius of curvature of the cooled strip (the radius of curvature of the

17. ## History

Sole proprietorships produce only a small fraction of annual sales in the U.S. economy because sole proprietorships A. are the most heavily taxed businesses. B. mainly are small businesses. C. use the factors of production less efficiently. D. have less

18. ## bookkeeping

suppose your business caters a party august 23.according to the contract ,your client will pay the 2500 bill on september 1.using the accrual basis of accounting ,how would you record the transaction? (a)on august 23,debit accounts receivable 2500 and

19. ## bookkeeping

what is the accounting system where you record revenue when the business earns it,and expenses at the time the business incurs them? (a)cash (b)GAAP (c)accrual (d)COGS my answer is c what is the time period called from the time the business opens to the

20. ## Chemistry

Sulfur trioxide gas, one of the causes of acid rain, is produced in the upper atmosphere when oxygen reacts with sulfur dioxide gas in the reaction shown below: 2SO2(g) + O2(g) 2SO3(g) deltaH0 = -197kJ The gases are placed in a reaction vessel and allowed

21. ## Geometry

Jake has two similar cylindrical pipes. The radius of the first cylindrical pipe is 5 cm. The circumference of the second cylindrical pipe is 20π cm. The volume of the second cylindrical pipe is how many times greater than the volume of the first

asked by how do i start working on this problem
22. ## Chemistry

A 0.150 M solution of nitrous acid (HNO2) is made. Ka = 4.5 x 10-4 1. Show the equilibrium which occurs when this acid is dissolved in water. 2. What is the pH of the solution? Show all work clearly. 3. 100.0 mL of the solution is titrated against 0.150 M

23. ## Chemistry :((((

explain why the bond angles found for the molecules below is as given below. Methane 109.5 Ammonia 107.5 water 104.5

24. ## physics

a) Suppose a bimetallic strip is constructed of copper and steel strips of thickness 1.1 mm and length 29 mm, and the temperature of the strip is reduced by 5.1 K. Determine the radius of curvature of the cooled strip (the radius of curvature of the

25. ## physics

Determine the magnitude of the force of gravity acting on a 340 kg satellite , 850 km above Earth's surface.

26. ## Calc 1 (Optomization)

A rectangular storage container with an open top is to have a volume of k cubic meters. The length of its base is twice its width. The material for the base costs \$6 per square meters and the material for the sides costs \$10 per square meter. Find the

27. ## economics

I am completely stuck on these two questions. I have read my chapter, but I am still doubting that I got the answers correct. 1.A decrease in aggregate demand causes a decrease in ______ only in the short run, but causes a decrease in ______ in both the

28. ## math:(

how do you compare the symbolic method for solving linear equations to the method of using a table? PLEASE HELP MY BUS COMES IN 30 MINUTES!!!

29. ## Pre-calculus

1. The graph of the equation y = x2 – 3 is symmetric with respect to which of the following? The answer is the y-axis . why? 2.The graph of an odd function is symmetric with respect to which of the following? the origin is the answer, why ?

30. ## Chemistry

Consider the decomposition of a metal oxide to its elements, where M represents a generic metal: M2O3 (s) 2M (s) + 3/2 O2 (g) Given a delta Gf: -770 Kj for the M2O3 0 Kj for the M 0 Kj for the O2 What is the standard change in Gibbs energy for the

31. ## Math

Let u= (2,1,0,1,-1) and v=(-2, 3, 1, 0,2). Find scalars a and b so that au-bv=(-8,8,3,-1,7)

32. ## Alg1

how to factor x^2+2x-3=0

A rectangular block of wood is 40cm wide, 60cm long and 30cm deep. If its relative density is 0.7 and it floats with its 30cm side verticle, determine: (a)the length of the block above the water surface and (b)the minimum force required to completely

34. ## bookkeeping

what is the july interest ?total purchase is \$15,632.16 with a %10 interest rate for 10 months 86.85 88.25 89.93 91.92 my answer is 89.93 what is the first months interest for the following \$7659.43 at an interest rate of %11 percent for 6months 50.78

35. ## Chemistry

A 0.150 M solution of nitrous acid (HNO2) is made. Ka = 4.5 x 10-4 1. Show the equilibrium which occurs when this acid is dissolved in water. 2. What is the pH of the solution? Show all work clearly. 3. 100.0 mL of the solution is titrated against 0.150 M

36. ## Alg1, Factoring

how to factor x^2+2x-3=0

37. ## Chemistry Help

100 ml of 0.2 M ammonium sulfate are reacted with 300 ml of 0.1M cadmium chloride . a yellow precipitate is formed. what is the weight of the precipitate produced.

38. ## Physics

Lead 212/82Pb (atomic mass = 211.991871 u) is converted into bismuth 212/83Bi (atomic mass = 211.991255 u) via β- decay. What is the energy (in MeV) released in this process?

39. ## physics

a carnival ride is made so that at a certain point the floor can be lowered and the people inside don't fall. if this carnival ride has 2.0 m radius and rotates 1.1 times per second: a) find the speed of the ride. B) find the centripetal acceleration of a

40. ## Geography

1 Why has there been a lot of internal migration within Italy? 2 extended decline in general business activity 3 Describe the economic activities that make Northern Italy a profitable region. 4 What other cultures have mixed with or influenced Spanish

41. ## Physics

A mass of 1.0 kg is located at the end of a very light and rigid rod 44 cm in length. The rod is rotating about an axis at its opposite end with a rotational velocity of 3 rad/s. (a) What is the rotational inertia of the system? kg · m2 (b) What is the

42. ## English

Thank you very much. Here are some more sentences I'd like you to check, too. In particular, I need to revise the following sentences. 1) For Prospero Caliban becomes the "most lying slave", though he really is filth. (" I have used thee -Filth as though

for the transition of an electron in a hydrogen atom between the principal quantum number levels 4 and 3, calculate a) the energy released b) the wavelength of the line in the spectra.

44. ## Chemistry

.050 mole of weak acid (HA) is dissolved in enough water to make 1.0 L of solution. The pH of this solution is 3.50. What is the value of Ka for this weak acid?

Sin23=p write cos113 in terms of p

46. ## English

I left out the following sentences. Thank you very much. I find it difficult to reorganize the sentences. 1) Prospero may be seen as a theatre director (through his magical art he controls all the events? but also as the projection of Shakespeare himself.

48. ## Chemistry

Calculate the [H+] in a solution containing 1.00 M hydroflouris acid (Ka=7.2 x 10^-4) and .50 M sodium fluoride

49. ## chemistry

You have a 1 L container of a gas O 2 at 20°C and 1 atm. Subtracting the weight of the container, what is the mass of the gas?

50. ## Algebra 2

I=2V/R+2r Solve for r. simplify

51. ## Algebra 2

two resistors are connected in parallel. Their resistances are 8 ohms and 17 ohms. What is the resistance (R) of the combination? R=---ohms

52. ## Applied Chemistry pls help!

At what depth in water is the pressure equal to 2.0m atmosphere?

53. ## Science

If the distance from the moon to the Earth decrease from 230,000 miles (which it is today) to 20,000 miles, what affect would this have on the tides?

54. ## Science

I need a hypothesis on: How does the green house effect influence temperature on Earth? Can you plz not give a link that doesn't help much

55. ## calculus

solve.what is the domain of x=f(p)= 520-40p

56. ## Algebra 3

How would I solve this problem in a calculator: -2x(squared) minus 6x+5, when asked these 6 questions; what are the roots of the prolem?, what is the factorization?, what is the vertex?, what is the minimum & maaximum?, axis of symmetry?.

57. ## physics

A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 10-4°C−1). At room temperature (20.0°C), the frames have circular lens holes 2.27 cm in radius. To what temperature must the frames be heated if lenses 2.28

58. ## physics

A hollow aluminum cylinder 22.0 cm deep has an internal capacity of 2.000 L at 21.0°C. It is completely filled with turpentine at 21.0°C. The turpentine and the aluminium cylinder are then slowly warmed together to 87.0°C. (The average linear expansion

59. ## physics

Lake Erie contains roughly 4.00 1011 m3 of water. (a) How much energy is required to raise the temperature of that volume of water from 9.0°C to 12.0°C? (b) How many years would it take to supply this amount of energy by using the 850-MW exhaust energy

60. ## history

How was the civil rights movement of the 1950s and 1960s a continuation of the Reconstruction-era struggle for blacks to achieve equality?

61. ## poetry

Which figure of speech is used in the following quotation? "The winter evening settles down with smell of steaks in passageways".

62. ## U.S History

What was part of the reason for the stock market to crash?

63. ## Econ

I am completely stuck on these three questions. I have read my chapter, but I am still doubting that I got the answers correct. 1.A decrease in aggregate demand causes a decrease in ______ only in the short run, but causes a decrease in ______ in both the

64. ## calculus

1)Which of the following results in the graph of f(x) = x2 being expanded vertically by a factor of 4? the answer is f(x) = 4x2. can you explain how. 2)Which is true for the graph of y=(x^2-9)/(x^2-4). the answer is vertical asymptotes at x = ±2 . please

65. ## art

How do you remeber the primary and secondary colours?

asked by not plannning to tell u
66. ## calculus

1)Which term best describes the linear programming situation represented by x+y=2 why is the answer infeasible? 2)Describe the linear programming situation for this system of inequalities. x < 1 y > 0 3x + y < 5 why is the answer unbounded?

67. ## science

how do u draw a detailed particle diagram showing chemical and physical changes in rocks? I actaully found the sheet on the internet whille reseaching the answer. I typed in the question and there was the sheet first one as well!!!!

asked by not planning 2 tell u
68. ## world issues

I am having a difficult time explaining mission based evaluation for a volunteer program. I know it has to do with volunteer that believe in the goal and objective of the organization. The problem is I do not know how to give and example of a volunteer

69. ## bookkeeping

what is the total interest for \$2596.40 with a interest rate of %9 percent.with a tiime of 7months 97.37 136.26 136.31 233.68 my answer is 233.68

70. ## Algebra 2

A photograph that is 4" by 6" is to be enlarged so that the width of the new photograph is 10". What is the length of the new photograph?

71. ## Math--Algebra 1

I really need help on this problem. I'm unable to concentrate because I have to memorize a whole play script today too, so I'm kind of stressing a bit too much for this one problem. The problem is "Marcy has a total of 100 dimes and quarters. If the total

72. ## bookkeeping

received a check for 154.72 for unassembled products includes 8.06 sales tax and 12.30 in transportation what is the entry for the transaction in the sales dept.a sales credit? (a)132.33 (b)134.36 (c)152.72 (d)154.69 my answer is b received a payment for

73. ## maths

determine the cost ratio (Retail Method) for Twilight Games and Comix Store if the cost of goods available for sale is \$36,000 and the retail value of good available for sale is \$90,000(express your answer to the nearest one-thousandth)

74. ## economics

In what kind of an economy does the government make all the decisions? A. mixed B. laissez-faire C. centrally planned D. free enterprise I say D am I right?

75. ## economics

What is one advantage of a centrally planned economy? A. low unemployment due to guaranteed jobs B. high levels of consumer satisfaction C. quick adjustment to changing conditions D. incentives for workers have new ideas Can someone please help me!!!

76. ## physics

A clock has an aluminum pendulum with a period of 1.000 s at 20.2 °C. Suppose the clock is moved to a location where the average temperature is 28.1 °C. (The linear expansion coefficient for aluminum is 2.20 10-5 °C−1.) (a) Determine the new period of

77. ## physics

If the strip is 28 mm long, how far is the maximum deviation of the strip from the straight orientation? (The deviation is measured from the straight orientation from the interface of the two strips.) Radius of curvature is 53.7

78. ## algebra

. A boy is sitting in his red wagon at the top of a hill, holding onto a tree to keep from rolling down the hill. The distance from the top of the hill to the bottom is 41 meters. He pushes off from the tree at a starting velocity of 2 m/s, and then

79. ## Chemistry

calculate the ph of a solution that results from titrating 0.0500 moles of cyanic acid to the equivalence point with an equal number of moles of OH-, if the final volume of the solution is 150 ml ka= 3.50 * 10^-4

80. ## physics

A steel rod of length 1 m is welded to the end of an aluminum rod of length 2 m (lengths measured at 23 °C). The combination rod is then heated to 198 °C. What is the length of the combination rod at 198 °C? (The linear expansion coefficients for steel

81. ## math

The cylinder x2+y2=16 divides the sphere x2+y2+z2=100 into two regions I (for the region inside the cylinder), and O (for the region outside the cylinder). Find the ratio of the areas A(O)/A(I) .

82. ## English

Can you please help me check this paragraph containing several grammar mistakes? Thank you. 1) Caliban is a sort of monster half man half beast. There is hostility between Prospero and Caliban. 2) Thanks to is magic art Prospero subdued all the spirit

83. ## Math

Determine whether the vector w=(0, -5, 7) can be expressed as a linear combination of the vectors v1=(2,-1,3) and v2=(5,0,4)

84. ## Life orientation

Environmental problem impact on your community within south africa

85. ## Life orientation

Environmental problem impact on your community within south africa

86. ## biology

1.Describe the pathway of an unfertilized egg as it travels through the female reproductive system

87. ## History

The _____ limits the actions of government leaders.

88. ## english

what is the personification of this sentence The wind whispered through the dark and gloomy forest.

89. ## Chemistry

How can you determine which colorless liquid is less dense?

90. ## marketing

what are the implications if there was no 'market'?

91. ## bookkeeping

a store purchased 500 in merchandise on account.using the periodic inventry system,how would you record your entry? (a)debit merchandise inventory 500 and credit accounts payable 500 (b)credit purchase 500 and debit accounts payable 500 (c)credit

92. ## Physics

A triply ionized beryllium atom (Be3+) has only one electron in orbit about the nucleus. What is the radius of the ion when it is in the n = 9 excited state?

93. ## Math

If it takes 45 minutes to make 15 chairs how long would it take to make 100 chairs.

94. ## chemistry

silver sulphate is a sparingly soluble salt.2.5litres of saturated solution of this salt contains 14.25g. Calculate the molar solubility of silver sulphate

95. ## chemistry

Silver sulphate is a sparingly soluble salt.2.5litres of saturated solution of this salt contains 14.25g. Calculate the molar solubility of silver sulphate.

96. ## Physics

A particle of mass m = 3.04kg is suspended from a fixed point by a light inextensible string of length = 1.11m. You are required to determine the relationship between the period of swing and the length of the pendulum. For small angle approximation, sin

97. ## Physics

A proton is located at a distance of 0.430 m from a point charge of +8.30 µC. The repulsive electric force moves the proton until it is at a distance of 1.55 m from the charge. Suppose that the electric potential energy lost by the system is carried off

98. ## chemistry

A sample of an ideal gas at 1.00 atm and a volume of 1.61 L was placed in a weighted balloon and dropped into the ocean. As the sample descended, the water pressure compressed the balloon and reduced its volume. When the pressure had increased to 45.0 atm,

99. ## Chemistry

What are the rules to determine the solubility of salts?

100. ## English

In my previous post I wrote "You should have used the past simple to refer to both Prospero's and Miranda's behaviours towards Caliban when they first arrived on the island. I still have to include a few other sentences. 1) In question 1 you were asked to

101. ## math

Imagine making a tent in the shape of a right prism whose cross-section is an equilateral triangle (the door is on one of the triangular ends). Assume we want the volume to be 2.2 m3, to sleep two or three people. The oor of the tent is cheaper material

102. ## math

The circumference of a sphere was measured to be 82 cm with a possible error of 0.5 cm. Use linear approximation to estimate the maximum and relative error in the calculated surface area.

103. ## physics

one side of a square bolck is 20 cm. the block weighs 320 grams. which numeral could be used to express the density? is it 0.04, 0.25, 16, or 25?

104. ## earth science

what radioactive isotope would be most useful in dating a mastodont bone ?why?

105. ## stats

The per capita consumption of coffee by people in the United States in a recent year was normally distributed, with a mean of 24.2 gallons and a standard deviation of 8.1 gallons. What proportion of people in the U.S. drink more than 20 gallons of coffee a

106. ## physics

Calculate the distance traveled by the concrete brick after 0.5 s if it moves with an initial speed of 5 ft/s up the incline whose angle of inclination with the horizontal is 300. Given, coefficient of friction of the incline is 0.144 and g = 32 ft/s2

107. ## Math

What is the average of checks written if I write in my check register -12.11-15.60+1500.00+2600.00

Twins who are 19.0 years of age leave the earth and travel to a distant planet 12.0 light-years away. Assume that the planet and earth are at rest with respect to each other. The twins depart at the same time on different spaceships. One twin travels at a

The vertices of triangle ABC are a(8,23) B(2,2) C(2,8). What are the coordinates of the vertices if the triangle is reflected across the x-axis? is it A(8,2) B(2, -2) C(2, -8)?

110. ## AP CHEMISTRY

A voltaic cell is constructed that uses the following half-cell reactions. Cu+(aq) + e− -> Cu(s) I2(s) + 2 e− -> 2 I−(aq) The cell is operated at 298 K with [Cu+ ] = 2.7 M and [I− ] = 2.7 M. (a) Determine E for the cell at these concentrations. (b)

111. ## history

You need to choose an individual or event in American History to 1877 and make an argument about why the person or event is significant. Each paragraph of your paper should reiterate and enforce the argument with evidence. Overall, there should be more

112. ## light

An object 5 millimeters high is located 15 millimeters in front of a plane mirror.How from the mirror is the IMAGE LOCATED?

113. ## Physics

A woman is standing in the ocean, and she notices that after a wave crest passes, five more crests pass in a time of 42.0 s. The distance between two consecutive crests is 24 m. Determine, if possible, the following properties of the wave. If not possible,

114. ## physics

true or false . refraction always involves a change in the speed and direction of a wave wat is required in order for diffraction to occur? wat causes wave interference?

115. ## physics

A 0.11 kg mass suspended on a spring is pulled to 6.9 cm below its equilibrium position and released. When the mass passes through the equilibrium position, it has a speed of 0.28 m/s. What is the speed of the mass when it is 4.1 cm from the equilibrium

116. ## science

How do quarks differ from other elementary particles?

117. ## Math

Kaity draws a scalene triangle. Two sides measure 5 inches and 3 inches? Can the third side measure 3 inches? Why or why not?

118. ## Math

Bren sets the table. He takes a square napkin and folds it in half. He makes a triangle. What two names can you use to describe the triangle?

119. ## Statistics

Should companies use the same confidence interval each time a confidence interval is determined or should the level change based on situations? If it changes based on situations, what type of situations might call for higher confidence levels?

120. ## statistics

what is the proportion of people who drink more than 20 gallons of cofffee per year if the mean is 24.2 gallons and the standard deviation is 8.1 gallons

121. ## Physics

What visible wavelengths will eject electrons from a a metal with a work function of 2.6 eV? Please show all work I am a little confused :)

122. ## psy

Professor Klinger says that you begin life as a blank slate, and that all of your ideas come from interaction with the environment rather than anything that you were born with. The professor is advocating a theoretical perspective based on a(n)

123. ## math

Jane needs to fill her pool with water. Ace said it will take them 40 minutes to fill the pool. Ben said it will take them 60 minutes to fill the pool. How long it will take for both Ace and Ben to fill the pool at the same time?

124. ## Math

A translation, a reflection, and a rotation that can be performed on a rhombus. Can you please help me with this? thanks, rebel

125. ## physics

A violin string vibrates at 440 Hz when unfingered. At what frequency will it vibrate if it is fingered one fourth of the way down from the end?

126. ## Politics

Which one is more preferable agency or sociological representation? Would be nice if someone can give any ideas on it. thanks

127. ## writing

Write about what happens during a doctor¡¯s or dentist¡¯s visit. Describe what patients do when they arrive at the office. Give information about what the nurse or dental assistant does before the doctor or dentist sees the patient. Tell about what the

128. ## chemistry - synthesis of aspirin

I wanted to calculate the theoretical and actual yield of aspirin. mass of salicylic acid = 2.005 g But isn't salicylic acid differ. from acetic acid? If so, how do we find the mass of acetic acid in this experiment volume of acetic anhydride = 4 ml mass

129. ## physics

A balloon of total mass 840 kg is rising vertically with constant speed. As a result of releasing some ballast, the balloon immediately accelerates at 0.5 m/s². Calculate the mass of the ballast released.

130. ## Life Sciences

What is the name of the tissue that transport water in plants?

131. ## Physics Question

Twins who are 19.0 years of age leave the earth and travel to a distant planet 12.0 light-years away. Assume that the planet and earth are at rest with respect to each other. The twins depart at the same time on different spaceships. One twin travels at a

132. ## PRE-ALGEBRA PT.2

Solve the equation. –6 + 3x = –9 A. –1 B. –6 C. –5 D. –3 i got c. -5