# Questions Asked onMay 1, 2013

1. ## General Chemistry

The value of delta H for the reaction below is -6536 kJ. ____kJ of heat released in the combutsion of 16.0g of C6H6. 2C6H6(l) + 15O2(g) yield 12CO2(g) + 6H2O

2. ## Chemistry

1. What is the change in atomic mass number when an atom emits an alpha particle? decreases by 2 *decreases by 4 increases by 2 increases by 4 2. If an isotope decays by the process of beta emission, ____. the mass number changes *the atomic number changes

3. ## History

1. What finally decided the outcome of the 2000 presidential election? Congress a state court judge *the U.S. Supreme Court the nationwide popular vote 2. What group was directly responsible for the terrorist attacks on the United States on September 11,

4. ## Financial Literacy

An architect's compensation package includes the total cost of a \$250-per-month health insurance plan, the total cost of a \$35-per-month life insurance plan, and a salary of \$55,000 per year. What is the yearly value of the compensation package? A.

5. ## algebra

A satellite dish has a parabolic cross section and is 6 ft deep. The focus is 4 ft from the vertex. Find the width of the satellite dish at the opening. Round your answer to the nearest foot. Thank you

6. ## Physics

Two waves traveling on a string in the same direction both have a frequency of 150 Hz, a wavelength of 2 cm, and an amplitude of 0.06 m. What is the amplitude of the resultant wave if the original waves differ in phase by each of the following values? (a)

7. ## Geometry

An unsharpened pencil is in the shape of a hexagonal prism, in which the face edge is 4 millimeters and the length is 170 millimeters. What is the lateral area of the pencil?

8. ## chemistry

A piece of dry ice (solid carbon dioxide) with a mass of 5.40 g is placed in a 10.0 L vessel? that already contains air at 715 torr and 25 degrees C. After the carbon dioxide has totally vaporized, what is the partial pressure of the carbon dioxide and the

9. ## Math

What do mountains breathe through? Volcanose?

10. ## Science

1.Why do you think an FRH doesn’t come with water already in it? 2.Do you think there are small pieces or large pieces of magnesium metal in an FRH? Explain. 3. Why is it important that the reaction in an FRH be fast?

11. ## Chemistry

Why does the equation Co(H2O)6 + 4Cl CoCl4 + 6H2O shift left when cooled?

12. ## Chemistry

Given the following unbalanced equation C4H10 (g) + O2 (g) → CO2 (g) + H2O (l) What mass of water forms if 6.5 L of C4 H10 (g) measured at STP is allowed to react with 32.0 L of O2 (g)measured at 27°C and 1.68 atm pressure?

13. ## Chem

What concentration of CH3NH3Br is necessary to prepare a pH = 10.00 buffer solution assuming the base concentration is 0.49 M (Kb for CH3NH2 = 4.4 x 10-4). In M

14. ## math

A rainwater collection tank is shaped like a cylinder with a diameter of 4 ft and a height of 6 ft. What is its volume? Use 3.14 for pi. A. 15 units^2 B. 20 units^2 C. 30 units^2 D. 62 units^2

15. ## physics

A pencil is rolled off a table of height 0.35 m. If it has a horizontal speed of 2.1 m/s, how long does it take the pencil to reach the ground?

16. ## Chen=mistry

Sodium metal reacts violently with water to form NaOH and release hydrogen gas. Suppose that 3.00 g of Na reacts completely with 3.00 L of water and the final volume of the system is 3 L. What is the molarity M of the NaOH Solution formed by the reaction?

17. ## Calc

Oscar Corporation is planning to construct an elliptical gate at its headquarters. The width of the ellipse will be 5 feet across and its maximum height along the center will be 3 feet. The company wants to place two bright spots at the foci of the

18. ## biology

1. Which of the following statements does not describe a difference between the DNA of prokaryotes and the DNA of eukaryotes ? a.prokaryotic DNA is shorter and less complex than eurkaryotic DNA b. Prokaryotic DNA chains have two nucleotides, eukaroyotic

19. ## English II

On a proud round cloud in a white high night. A. alliteration B. consonance C. assonance D. limerick

20. ## physics

a 1-kilogram block slides down a frictionless inclined plane with an angle of 35 degrees and 1.0 meters high. what is its velocity at the bottom of the plane?

21. ## science

A boy is riding a skateboard. Why does the skateboard have the ability to do work? A. because it can slow down B. because it can change direction C. because the force applied by the rider acts in the same direction as the motion of the skateboard D.

22. ## English 10-Check/Help

I need help with the rhyme scheme and rhythm pattern. "It was many and many a year agoIn a kingdom by the sea,That a maiden there lived whom you may knowBy the name of ANNABEL LEE;And this maiden she lived with no other thoughtThan to love and be loved by

23. ## Chemistry

50.0 mL of 0.116 M NaOH is titrated with 0.0750 M HCl. Calculate the pH after the addition of 5.0 mL volume of acid.

24. ## chemistry

Methane gas is burned releasing Carbon Dioxide into the atmosphere. How much CO2 (g) is released if 78.5 Liters of Methane is burned? CH4 + O2 --> CO2 + H2O

25. ## Chemistry

Aqueous ammonia is typically sold by chemical supply houses as the saturated solution, which has a concentration of 14.5mol/L. What volume of NH3 at STP is required to prepare 100. mL of concentrated ammonia solution?

26. ## Math

A bicycle lock has a 4-digit combination. Each of the digits is a number from 0 to 9. Find the probability that the lock has a combination in which 3 of the 4 digits are 3s

27. ## Financial Literacy

Trina's employer purchased a health insurance plan that costs \$550 per month. Trina pays \$85 toward the plan each month. What is the annual value of the employer's contribution? A. \$7560.00 B. \$5580.00 C. \$1020.00 D. \$6600.00

28. ## Physics

A flute can be regarded as a tube open at both ends. It will emit a musical note if the flutist excites a standing wave in the air column inside the tube. The lowest musical note that can be played on a flute is C (261.7 Hz). What must be the length of the

29. ## chemistry

The volume of a sample of a gas collected over water at 32 Celsius and 752 torr is 627 ml. What will the volume of the gas be when dried and measured at STP? (Vapor pressure of water at 32 Celsius = 35.7 torr)

30. ## chemistry

The volume of a mass of gas is 300 ml at 25 Celsius and 685 torr. What will the gas occupy at STP?

31. ## statistics

Paul received a score of 80 on a history test for which the class mean was 70 with a standard deviation of 10. He received a score of 75 on a biology test for which the class mean was 70 and the standard deviation was 2.5. On which test did he do better

32. ## math

A conical funnel has a base diameter of 4 cm and a height of 5 cm

33. ## Chemistry

what is the hydronium ion concentration in a 0.55 M HNO3 solution ? what is the pH of this solution? Thank You!!!

34. ## Chemistry

A student determined the H of neutralization of nitric acid (HN03) mixed with NaOH solution, using the procedure described in this experiment. Fifty milliliters of 1.00M HN03 was added to 50.5 mL of 1.00M NaOH solution, and the following time-temperature

35. ## Chemistry

what is the hydronium ion concentration in a 0.55 M HNO3 solution ? what is the pH of this solution? Thank You!!!

36. ## Algebra

7t^4 • 7t^4 A.49t8 B.14t4 C.49t16 D.14t8 Is this 49t^8...A..?

38. ## physics

A diving bell is lowered into the sea at a speed of 6m/s and comes to rest with uniform retardation at a distance of 20m below the surface. What is it's retardation?

39. ## math

A spherical ballon is being inflated at the rate of 35cc/min. the rate of increase in the surfece area(un cm²/min.) of the ballon when its diameter is 14cm is: 1. 10 * under root 10 2. under root 10 3. 100 4. 10

40. ## economics

What are welfare payments or consumer subsidies?

41. ## Eng B

Shall I compare thee to a summer’s day? Thou art more lovely and more temperate: Rough winds do shake the darling buds of May, And summer’s lease hath all too short a date: Sometime too hot the eye of heaven shines, And often is his gold complexion

42. ## Math

A math class has girls and boys in the seventh grade and girls and boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students she selects are both

43. ## Math

Ariel's garden is planted in the shape of a square and has an area of 81 square feet. If she plans to put a fence around the perimeter of the garden, how much fencing will she need? A) 18 ft, B) 41 ft C) 36 ft D) 9Ft I came up with D 9 foot but apparently

44. ## Chemistry

Calculate Kp at 298K for the reaction SO2 + NO2--->SO3 + NO

45. ## calc

Integrate 2(x^2)e^g(x) where g(x)=4^(x^3)

46. ## Science

How could an architect estimate the weight of a brick wall if each brick weighs three pounds?

47. ## Geometry

a belt is wrapped tightly around circle O and forms a right angle at P, outside the circle. find the length of the belt if circle O has a radius of 8.

48. ## math

In a sample of 77 widgets,6 were defective, How many defective widgets would you expect in a sample of 616 widgets?

49. ## Geometry

a belt is wrapped tightly around circle O and forms a right angle at P, outside the circle. find the length of the belt if circle O has a radius of 8.

50. ## english

3. Which one of the following sentences best describes paraphrasing? A. Janette listened to the speaker and took notes. B. Janette listened to the speaker, asked questions, and wrote a report. C. Oscar studied Dr. Frost's article and summarized it in his

51. ## Physics

Some communication satellites are put into a circular geosynchronous orbit in which the satellite remains above a certain position on the earth's equator as it orbits. Such a satellite would always be in the same position in the sky as seen from the

52. ## Chemistry

The volume of a mass of gas is 300 ml at 25°C and 685 torr. What will the gas occupy at STP? Will the temperatures be the same when I do (P1V1/T1) = (P2V2/T2) ?

53. ## algebra 1

Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 minutes, 84.8 C after 9 minutes; 70.2º C after 18 minute; 54.4º C after 30 minutes; 42.5ºC after

54. ## Calculus

A particle moves along the curve y = sqr(1+x^3). As it reaches the point (2,3), the y-coordinate is increasing at a rate of 4cm/s. How fast is the x-coordinate of the point changing at that instant?

55. ## Elements of Calc.

A 17 foot ladder is placed against a wall. if the foot of the ladder is pushed toward the wall at 0.5 feet per second, how fast is the top of the ladder rising when the foot is 8 feet from the wall?

56. ## Urgent Language Arts~!

10. In the following sentence, "Abraham Lincoln was a widely admired politician,” which statement is correct? (1 point) Add a hyphen between widely and admired. Add a hyphen between admired and politician. Add a hyphen between Lincoln and was. No hyphen

57. ## Geometry

a belt is wrapped tightly around circle O and forms a right angle at P, outside the circle. find the length of the belt if circle O has a radius of 8.

58. ## English

1. Two months ago, he was flying to L.A. for a meeting. 2. Two months ago, he was flying to L.A. to have a meeting. (Are both the same?) 3. While he was writing a report, the battery in his computer died. (What other words can we use instead of 'died'?) 4.

59. ## Math

Juan's model locomotive is 7 5/8 in long HIs coal car is 6 1/4 in long when hooked together there is a 7/8 inch space between the cars. What is the total length when the two cars are hooked together? I added the fractions and got 13 7/8 what do I do with

60. ## Calculus

Differentiate ln(cos(2x))

61. ## Chemistry

Estimate the temperature where Delta G = 0 for the following reaction (Given: Delta H=-176 and Delta S = -284.5 J/K NH3 + HCl --> NH4Cl

62. ## Chemistry

what is the rate of a first-order reaction that has a reactant concentration of 1.1M and a rate constant of 0.14/s?

63. ## life orientation

Identify and describe 3 environmental health hazards that cause ill health,crises,and or disasters within your community or any other community within south africa and globally.

64. ## English 10-Check/Help

Part 1: Poem Structure Check my following answers below, and I need help with theme? Dx In this part, you will analyze the structure of the poem. Please fill out the following. Title of Poem: Annabel Lee Poet: Edgar Allan Poe Theme: Type of Poem: Narrative

65. ## U.S. History

Briefly describe what happened in the presidential election of 2000, including who the candidates were, who won, and how the win was accomplished.

66. ## english

1. Read the following stanza from “Alone”: Lying, thinking Last night How to find my soul a home Where water is not thirsty And bread loaf is not stone I came up with one thing And I don’t believe I’m wrong That nobody, But nobody Can make it out

67. ## Math (Combinatorics)

In the plane, the points with integer coordinates are called lattice points. Suppose a flea in the plane jumps from one lattice point to another. Each jump is one unit to the right, one unit to the left, one unit up, or one unit down. If the flea starts at

68. ## Geometry

A landowner digs a 15 meter deep well with a diameter of 2.8 meters. The landowner spreads the dirt dug out of the holds to form a flat platform 31.5 meters by 6 meters. What is the length of the platform?

69. ## Justice system

1. The majority of historical and scholarly evidence suggests that poverty: A. and crime tend to increase at the same time. B. may serve to perpetuate crime but is not a major cause of crime. C. and crime are totally unrelated. D. and crime rates stand in

71. ## mcc

Larry bought a house for \$220,000. After one year, its value appreciated (increased in value) by 15%. During the second year, its value depreciated (decreased in value) by 12% from its value at the end of the first year. What was the value of the house at

72. ## Justice system

1. The crime control model: A. stresses the possibility of error in the stages leading to trial. B. believes in protecting society from criminal behavior. C. emphasizes the need to protect procedural rights. D. assumes that justice is better served if

73. ## chemistry

Matt forgot to put the fabric softener is the wash. As his socks tumbled in the dryer, they became charged.If a small piece of lint with a charge of +1.25 E -19 C is attracted to the socks by a force of 3.0 E -9 N, what is the magnitude of the electric

74. ## Algebra

Given f(x)=x^2 + x + 4 and h(x)= 3x +2, evaluate the composite function. f [h(x)]

75. ## life orientation

Teenage pragnancy

76. ## Math

One-ninth of Polymer Plastics’ sales are made in New England. If New England sales amount to \$600,000, what are the total sales of the company?

77. ## physics

The inverted pendulum shown consists of a uniform rod of length L and mass M hinged at its base. A spring is attached a distance h from the pendulum’s pivot and has a spring constant k. At equilibrium the pendulum is perfectly vertical. For small

78. ## Physics

1. How much work must be done to stop a 1750 kg truck traveling at 110.0 km/h?

79. ## Algebra

Given h(x)= 2x + 2 and f(x)=1/2 x + 4, evaluate the composite function. h[f(x)]

80. ## Chemistry

dilute the concentration of 100mL of KIO3 from 0.5M to 0.0005M

what is 5X8=

82. ## l.o

in 10-20 lines critically discuss 5 ways in which the environmental problem impacts on the community(any community in south africa)

83. ## English II

"Base Details" If I were fierce, and bald, and short of breath, I’d live with scarlet Majors at the Base, And speed glum heroes up the line to death. You’d see me with my puffy petulant face, Guzzling and gulping in the best hotel, Reading the Roll of

84. ## physic

The composite bar BCD in the figure is composed of an inner aluminum cylindrical core of length 2l=2m and radius R=1cm and a sleeve of steel of length L=1m and thickness R=1cm surrounding the aluminum core in the CD section of the bar. The Young’s moduli

85. ## physics

A block with mass m=6.00kg slides down a surface inclined at 37° to the horizontal. The coefficient of kinetic friction is 0.20. A string attached to the block is wrapped around a flywheel on a fixed axis as seen in the figure. The flywheel has mass 25.0

86. ## math

h(t)= 20t-4.9t^2

87. ## Math

At 30 degrees, Edgardo said the temperature was warm enough to go swimming. Did he mean to give the temperature in Fahrenheit or Celsius. Explain.

88. ## Grammar

What revision will correct the sentence? "Welcome," the announcer began. "to our fifth annual competition!" A. The word the should be capitalized. B. The period after began should be changed to a comma. C. The word to should be capitalized. D. No revision

89. ## Physics

Physics Help!!!!! Maximum Kinetic Energy based on a graph? A 2.50kg ball is attached to an unknown spring and allowed to oscillate. The figure shows a graph of the ball’s position x as a function of time t.(Figure 1) Part A: What is the maximum kinetic

90. ## Ife orientation

Provide 5 ways in wich you critically discuss the impact of hiv/aids on teenagers

91. ## englis

8. Which of the following options accurately represents the steps involved in the writing process? A. Write first draft, edit, revise, write final draft B. Write first draft, revise, proofread, write final draft C. Plan, write first draft, edit, write

92. ## Chemistry

Use the data in the table to calculate the Delta G0 of the following reaction at 298k: Al2O3 ---> Delta G fusion -1582.3 HCl----> -131.2 AlCl3 -----628.8 H2O --- -237.1 The equation is Al2O3 + 6HCl ---> 2 AlCl3 + 3H2O products - reactants?

93. ## islah publek school

a rectangular garden has a perimeter of 140m.its width is three quarter of its length. what is the length and width?

94. ## chemistry

The following reaction occurs in a 2.0L reactor at 800 degrees c. CO+H20-CO2+H2 The reactor is charged initially with 5.0 atm of CO and 8.0 atm of water vapor. Calculate the final pressure of hydrogen in the reactor.

95. ## geometry

M is the midpoint of JK, Q is the midpoint of MK, and X is the midpoint of MQ. if a point on JK is picked at random, what is the probability that the point is on MX?

96. ## Math

I need to find the exact value of tan(arccos(-sqrt 11/6)).

97. ## Eng B

Among early epic poems, _____ is the story of a man who searches out a beloved friend in the land of the dead. A. Beowulf B. Gilgamesh C. The Iliad D. The Odyssey Answer is "D"

Austin & Kaitlyn Kojan invested \$195,000 in a business venture. If Kaitlyn invested 2 1/4 as much as Austin invested, how much money did Kaitlyn invest?

99. ## life orientation

How water pollution problems that causes ill health,accident, crises and disasters within my community or ony community within south africa and globally

100. ## Math (Geometry)

Square ABCD has M as the midpoint of AB, N as the midpoint of BC, P as the midpoint of CD and Q as the midpoint of MP. If the area of AMNPDQ is 20, what is the area of ABCD?

101. ## English

How do you pronounce "mouths," which is the plural form of 'mouth.'

102. ## math

if sin^14A+cos^20A=x then find the smallest interval in which value of x lie

103. ## chemistry

Three metals, iron, copper, and gold, have heat capacities of 0.450 J/goC, 0.385 J/goC and 0.129 J/goC, respectively. A 10g sample of each metal was heated in a water bath at 100oC. One of these metals will be placed in a Styrofoam cup containing 50.0 mL

104. ## Life Orientation

Hi I am a matric learner and I am having trouble with an lo portfolio assignment. it is about environmental issues and im stuck. I need to identify and describe 3 environmental health hazards that cause ill health, accidents, crisis and disasters within my

105. ## Statistics

Use the sample data and confidence level to construct the confidence interval estimate of the population p....n=5200, x=4821, 99% confidence

106. ## Physics

Consider the following RLC series circuit. with V=5 Volts, R=15 Ohms, C=0.004 Farad, L=0.045 Henry. Define the frequencies ω± as the frequencies such that the absolute value of the current of the circuit I0(ω) equals 1/2*I0max. What is the difference

107. ## LIFE ORIENTATION

Discuss in paragraph of 150 words 5 ways in which one can take responsibility to provide safe and healthy living environment

108. ## Math

Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 minutes, 84.8 C after 9 minutes; 70.2º C after 18 minute; 54.4º C after 30 minutes; 42.5ºC after

109. ## Accounting

Alliant Corporation sold \$100,000,000 face value 8% bonds. The bonds mature in 20 years and pay interest semiannually. The going market rate of interest on bonds of similar risk is 6%. How much will Aliant receive upon the sale of the bonds

110. ## Physics

The planet Tralfamador is a planet of mass M and radius R, and very thin atmosphere (neglect air resistance). A magnetic rail gun has been mounted on the surface of Tralfamador at the North pole. A projectile of mass m is fired from the magnetic rail of

111. ## Physics

Consider the following standing wave, (all units are SI) z=0.2sin(0.4y)cos(350t) (a) what is the wavelength? (b) what is the angular frequency ω in radians/sec? (c) what is the frequency (f) in Hz? (d) The values of y where the displacement is always

112. ## Science

What concentration of CH3NH3Br is necessary to prepare a pH = 10.00 buffer solution assuming the base concentration is 0.49 M (Kb for CH3NH2 = 4.4 x 10-4).

113. ## Music

Who sang the song Oliver Twist

114. ## algebra

convert 0,125m to km

115. ## physical science

A nail is driven into a board to a depth of 1.00 cm with one strike from the hammer. The hammer striking the nail hit it with a force of 200.00 Newtons. How much work was done?

116. ## Math

Jan built a cube from unit cubes (each 1 by 1 by 1 unit). Ken took this cube apart,and used the unit cubes to build a rectangular solid that was the same height asJan's cube but 2 units greater in width and 2 units less in length. Ken had 24 unit cubes

117. ## life orientation

discuss in a paragraph of 150 words ways in which one can take responsibility to provide safe and healthy living environment

118. ## Thermodynamics

Water in a piston/cylinder is at 100degC, x=0.5 with mass 1kg and the piston rests on two stops. The equilibrium pressure that will float the piston is 300 kPa. The water is heated to 300degC by an electrical heater. a) At what temperature would all the

119. ## Physics

Consider an RC series CKT with V in series with RC. V=7 V, R=15 Ohm, C=0.0025 Farad. At t=0 we start charging the capacitor with no charge initially on the capacitor. (a) Calculate the time t∗ (in seconds) when the potential across the capacitor is V/2.

120. ## Math

You observe a plane approaching overhead at a speed of 600 mph. The angle of elevation of the plane is 14 degrees at one time and 54 degrees two min later. A) What is the altitude of the plane? B) how far from the plane are you (after two minutes)?

121. ## Chemistry

calculate the volume of 1.07M phosphoric acid solution necessary to react with 22.9 ml of 0.150M Mg(OH)

122. ## Math

Is this the correct numerical expression for 15 less than one-ninth of P? 15-1/9 P

123. ## Accounting for Non Accounting Majors

Comment on Dr. Hendley’s statement that the difference between the opening bank balance (\$30,000) and the January statement balance (\$75,000) is pure profit.

125. ## Math

Out of 124 questions I missed 39. what percentage is that out of the 124?

126. ## Eng B

As we find with most songs, in poetry

127. ## math

Elizabeth has a box of shirts. one half of the shirts are small, 2/5 of the shirts are medium, and 5 shirts are large. How many shirts are in the box?

128. ## Maths

An equilateral triangle with side length 33 is divided into 33^2 smaller unit equilateral triangles each with side 1, forming a triangular lattice. We color each segment of length 1 either Red, Blue or Green, subject to the condition that each small unit

129. ## statistics

researcher wants to know if state quarters have a weight that is mor than traditional quarters. he selected 18 state quarters and 16 traditional, weighed each of them and recorded data. test the claim that state quarters have a mean weight that is more

130. ## math

1/4v=5 Use the substitution method to solve this problem.

131. ## Algebra

Given f(x) = 2x − 1 and g(x) = 4x − 4, evaluate the composite function. g[f(x)]

132. ## CHEMISTRY HELP!!!

21. Classify the following solutions in order of increasing pH: a. 0.01 M NaOH b. pure water c. 0.10 M HCl d. 0.05 M NaOH e. 0.001 M HCl

133. ## college algebra

I have been stuck on this problem for over a week and I don't even know how to start the problem. Parabola equation y= 4(100 - x^2/2500) x and y are measured in feet A. Find the length of the road across the bridge B. find the height of the parabolic arch

134. ## Further Mathematics

The sum of the first three terms of a G.P is 7/8 of the sum to infinity .Find the common ratio.

135. ## math

if a woman has a 50 ft. piece of wire & cuts it into strips 1 2/3 feet long, how many pieces will she have

136. ## Math

An individual has 25000 to invest. As their financial consultant, you recommend investing in Treasury Bills earning 7%, Corporate Bonds earning 9% and Junk Bonds earning 11%. Find all the investment alternatives that will earn \$2000 per year.

137. ## Justice system

In contrast to the Warren Court, the Burger Court appeared to support a/an: A. due process model. B. crime control model. C. corrections model. D. inmates model. is it B 2. Natural law is best described as: A. the laws of the church. B. a body of

138. ## Math

emma throws the javelin for the track team. At one meet she threw the javelin twice. One the first attempt she three 28 meter and on the second attempt she threw 32 meters. What is the ratio between the length of the first throw and the second throw?

139. ## U.S. History

How did the events of June 6, 1944, impact on World War 2?

140. ## Chemitry

calculate the volume of 1.07M phosphoric acid solution necessary to react with 22.9 ml of 0.150M Mg(OH) 2H3PO4 +3Mg(OH)2 ==> Mg(PO4)2 + 6H20

141. ## chemistry

What is the minimum volume of 10.0 M H2SO4 necessary to react completely with 16.2g of Na2CrO4?

142. ## Physics

a metal sample carrying a current along X-axis with density Jx is subjected to a magnetis field Bz(along z-axis). the electric field Ey developed along Y-axis is directly proportional to Jx as well as Bz. the constant of propotionality has SI unit. 1.

143. ## physics

A downhill skier is on top of a hill at a height of 30.00 meters. How fast will he be moving when he is at level portion at the bottom of the hill?

144. ## math

if matt buy's a cola at \$1.69,gets a refill 3 time, for cost of \$.45 each: which answer best fit the problem! a.d=3-1.69+.45 b.1.69+3.45 c.d=1.60+0.45+3 d.3=3-1.69+0.45

145. ## physics

bar subjected to gravity load (two segments) the bar in the fig has constant cross sectional area A .the top half of the bar is made of material with mass density and youngs module, the bottom half of the bar made of density and young module total length

146. ## Physics

A massless spring, with K=425 N/m, is hung vertically with the bottom end of the spring at position Y.i. A 3.50 kg mass is attached to the bottom of the spring and allowed to fall and oscillate. A) How far below Y.i does the mass fall before coming

147. ## Physics

A circuit contains a self-inductance L in series with a capacitor C and a resistor R. This circuit is driven by an alternating voltage V=V0sin(ωt). We have L=0.015 H, R= 80 Ω, C= 5e-06 F, and V0=40 volts. (a) What is the value (in radians/seconds) of the

148. ## Chemistry

Points in favour: 1.Diffusion helps reduce the pollution of toxic gases. Points against: 1. old stains of ink, tea/coffee, cooked food are hard to remove through diffusion, or just hard to remove ... HELP PLS....V.V.IMPORTANT

149. ## History

Who is Shaka Zulu

150. ## mathematics

A person can drive from city A to city B at a certain rate of speed in 6 hours. If she decreases her speed by 10 mph, she can make the trip in 8 hours. How far is it from city A to city B?

151. ## English

Select one of the common terms below to redefine in your own words. Make some prewriting notes in the text box. Make sure to indicate which term you have chosen. Terms: -friendship -gratitude -disgust -isolation -accomplishment -satisfaction -hypocrisy

152. ## Math/Stats

I have like 9 more of these problems, can someone please help me out so I can get started. thanx JS In a random sample of 35 tractors, the annual cost of maintenance was \$4,425 and the standard deviation was \$775. Construct a 90% confidence interval for

153. ## math

If velocity v of blood flow at distance r from the center of an artery of radius R is given by v = k (R^2 - r^2), constant k > 0, find the average velocity v along the radius of an artery using 0 to R as the limits of integration

154. ## Calculus

Derive: F(x)= sqrt(3, 1 + tan(x))

155. ## Math

Consider all 3-term geometric sequences with first term 1 and with common ratio the square of an integer between 1 and 1000 (inclusive). How many of these 1000 geometric sequences have the property that the sum of the 3 terms is prime?

156. ## English

Can someone correct these questions, please? Thank you very much in advance. 1) Briefly outline the features of the 18th-century novel focussing on the type of narrator, the hero and the time and place setting. 2) Analyze the structure of Swift's

157. ## Math (Algebra)

The roots of the polynomial f(x)=7x2+31x+c=0 are reciprocals of each other. What is the value of c?

158. ## Geometrey

A right triangle has perimeter equal to 80 and hypotenuse equal to 34. What is the area of the triangle?

159. ## Life Orientation

5 ways of in which you critically discuss how lifestyle disease impact on the teenager

160. ## English

I have to write essay but need help.essay topic how to get rid of facebook?

161. ## English

what is the noun !@#\$%^&tion of He must like studying calculus.

162. ## American Government

What is the largest citizen's group with over 30 million members?

163. ## Physics

Consider the series RLC circuit in which R2

164. ## chemistry

the density of mercury is 13.6 g/cm3. how many liters are in 829 grams of Hg.

165. ## Statistics :(

I have like 9 more of these problems, can someone please help me out so I can get started. thanx JS In a random sample of 35 tractors, the annual cost of maintenance was \$4,425 and the standard deviation was \$775. Construct a 90% confidence interval for

166. ## LIFE ORINTATION

DISCRIBE THE BASIC CONDITION OF EMPLOYMET ACT

167. ## U.S. History

Briefly describe "New Federalism."

168. ## Life orientation

Describe the life style disease/ behaviour and factors that contribute to the disease

169. ## algebra.. HELP ME!!!

Three roots of f(x)=x^4−2x^3+ax^2+bx+c are −5, −3 and 4. What is the value of a+b+c?

170. ## Math

I'm having a hard time coming up with the right equation to solve this one. E-Z Stop Fast Gas sold \$10,957 worth of gasoline yesterday. Regular grade sold for \$2.30 a gallon and premium grade sold for \$2.55 a gallon. If the station sold 420 more gallons of

171. ## math

number N of state and federal inmates in millions during year x where x >=2002 can be approximated by the following formula N=0.04x-79.02. determine the year in which there were 1.1 million inmates

172. ## Math (Algebra)

Arnau is running a luggage shop. A brand-new item priced at 30% above the cost price did not sell well. So he took 39 dollars off the price, and found that the bags sold very well. If the profit for each bag is now 10% of the cost price, what is the cost

173. ## math

Jim draws a sketch of his bedroom wall to scale. The actual wall is 10 feet long and 8 feet high. The drawing is one- sixth the length and width of the actual wall. What are the dimensions of the drawing in inches?

174. ## Algebra

Given f(x)= 2x^2 – 1 and g(x) = –2x + 1, find the following. f(3) − g(3)

175. ## science

a propane gas reacts with oxygen to produce carbon dioaxide and water is this heat energy or nucler energy

176. ## science

a propane gas reacts with oxygen to produce carbon dioaxide and water is this heat energy or nucler energy

177. ## physics

what should be the length of aluminum and a brass rods at STP. so that brass rod is longer than the aluminum rod by 4 cm at all conditions of temperature

178. ## life orientation

5 ways in which the human or environmental problem impacts on the community . provide relevant sources to support your claims.

179. ## Physics

Consider the following RLC circuit with V=3 Volts, R=25 Ohms, C=0.006 Farad, L=0.085 Henry. Define the frequencies ω± as the frequencies such that the absolute value of the current of the circuit I0(ω) equals 12I0,max. What is the difference

181. ## Algebra

H= 16t^2. To solve Round answer to nearest 10th of a second. A stuntman jumped from a ht of 329 ft off a crane, onto a airbag. Determine the time of stuntmans fall. Fall lasted approximately_______ seconds.

182. ## mathematics

In a collection of nickels, dimes and quarters, there are twice as many dimes as nickels, and 4 fewer quarters than dimes. The total value of the coins is \$5.75. How many nickels are there in the collection ?

183. ## government

A colony of a country that followed mercantilism during the 17th century would NOT be encouraged to develop __________.

How do you add fractions with different denominators? Thanks if you help :)

185. ## life orietation

identify and describe 3 environmental health hazards that cause ill health,crises,and disasters within south africa and globally,

186. ## life oreination

5 factors that contribute to a lack of physical fitness and proper nutrition in the adolescent

187. ## statistics

In a survey of 1,000 people, 520 are opposed to the tax increase. Construct a 95% confidence interval for the proportion of those people opposed to the tax increase.

188. ## math

Assume you do not know the population standard deviation. describe how you form a 90% confidence interval to estimate the population mean age for students at Westwood College Online.

189. ## Maths

There are 4 students in a class. A teacher wants them to each secretly choose a partner for a group project. If everyone independently choses a partner randomly, the probability that everyone choses a partner who chose him/her is P. What is the value of

190. ## Physics

a metal sample carrying a current along X-axis with density Jx is subjected to a magnetis field Bz(along z-axis). the electric field Ey developed along Y-axis is directly proportional to Jx as well as Bz. the constant of propotionality has SI unit. 1.

191. ## Math

The Book Nook makes four times as much revenue on paperback books as on hardcover books. If last month’s sales totaled \$124,300, how much of that money was made on paperbacks?

192. ## Math

When I add the mixed number 1 5/6 + 1 3/4 I get 2 19/12 How do I simplify that?

193. ## Maths

Estimate the following questions (A) 4013 divided by 22 (B) 182x18 divided by 0.46 (C) 382x43 divided by 0.24 WITH WORKINGS

asked by Estimate 4013 divided by 22
194. ## math

245 = .25x not sure how to do this since I have only learned with ratios

195. ## Cal/Math

F(x) = 3-2x, x is less than or equal to 5 F(x)= e^x find the absolute and local max and mins of f

196. ## science

a student went downhill from a flatsurface on a skateboard is this increase in friction or increse in velocity

197. ## science

a student went downhill from a flatsurface on a skateboard is this increase in friction or increse in velocity

198. ## science

Does the moon reflect or absorb sunlight?

199. ## life orientation

Identify and describe 3 environmental health hazards that cause ill health,crises and disasters within any other community within south africa and globally

200. ## math (Algebra)

I was wondering if someone can help me with this question ,please... (2r5+r3)^2 r=radical

201. ## physics

bar subjected to gravity load (two segments) the bar in the fig has constant cross sectional area A .the top half of the bar is made of material with mass density and youngs module, the bottom half of the bar made of density and young module total length

202. ## language and art

How to write a character sketch?

203. ## Speech

Please rephrase the following sentences into a more simple manner. I need to give a presentation and i would like to write this out simpler. Thank you guys Research of soil erosion is difficult for several reasons, but particularly because soil erosion is

204. ## mathematics

In a collection of nickels, dimes and quarters, there are twice as many dimes as nickels, and 4 fewer quarters than dimes. The total value of the coins is \$5.75. How many nickels are there in the collection ?

I still need help on 1 and 2. Identify the object of the preposition in each of the following sentences. 1. Ashley and her father arrived home from work. a. and b. father c. from d. work 2. Ashley put her journalism books in the new bookcase. a. bookcase

206. ## Everybody hw help who go facebook

I don't use facbook.but hw essay topic what should people do to get rid out of facebook? What should they do if they r addicted to it? Ples helppp

208. ## Music

What is Afrobeats ????

209. ## English

Every sentence in the paragraph below violates some principle of good persuasive writing. Revise the paragraph, following the directions at the end of each sentence; use your imagination where necessary. Type the revised paragraph in the text box provided

210. ## math

exercise no 1.4 question no 5

211. ## Maths

G is a circle with chord AB. P is a point outside of G such that PA is tangent to G and ?BPA=90°. If AB=48 and PB=8, what is the radius of G?

212. ## Calculus

f(x)= e−(5x)⋅cos(3x)

213. ## physics 2

Suppose that now the magnetic field is reversed, i. e., it is coming out of the page. The charges q1 and q2 are positive, and the charges q3 and q4 are negative. How many of the display paths are incorrect?

214. ## Math (Algebra)

As x ranges over all real values, what is the minimum value of the polynomial x4−14x2+303?

215. ## social studies

Respond to the following in a complete sentence: Why do you think some Framers of the Constitution insisted on including a Bill of Rights? can you please help me on this

217. ## physic

The bar in the figure has constant cross sectional area A . The top half of the bar is made of material 1 with mass density ro1 , and Young’s modulus E1 . The bottom half of the bar is made of material 2 with density ro2 and Young’s modulus E2=2E1 .

218. ## physics

bar subjected to gravity load (two segments) the bar in the fig has constant cross sectional area A .the top half of the bar is made of material with mass density and youngs module, the bottom half of the bar made of density and young module total length

219. ## life orientation

in 10 15 lines critically discuss 5 ways in which the human or enviromental problem impacts on the community

220. ## English

What are some mature ways to decide issues within groups?

221. ## mathematics

In a collection of nickels, dimes and quarters, there are twice as many dimes as nickels, and 4 fewer quarters than dimes. The total value of the coins is \$5.75. How many dimes are there in the collection ?

222. ## mathematics

In a collection of nickels, dimes and quarters, there are twice as many dimes as nickels, and 4 fewer quarters than dimes. The total value of the coins is \$5.75. How many quarters are there in the collection ?

223. ## agriculture

Outline and explain the objectives of fencing a farmland.

224. ## Justice system

Although its meaning may vary from one culture to the next, __________ appears to be an almost universal taboo. A. murder B. rape C. theft D. incest im confused between B n D 2. “Common law” refers to: A. offenses committed against the safety and order

225. ## english competiton

help the environment by recycling

226. ## calc

Given X^2 + Y^2 = R^2, namely, a circle with center (0,0) and radius R, use integration to prove that the circle’s area equals πR2

227. ## math

(Mad +lice)+(equations + r +p - square)= decimal_______

228. ## milimeters question

A box measures 24mm on a side. What is the volume of the box ? Help me with steps please?

229. ## U.S. History

The Soviet Union was angry at the efforts of the United States to prevent it from successfully spreading its communist ideology. Briefly describe two actions that it took in retaliation.

230. ## Chem

In a preweighed flask a sample of5.8 gm was combined with water,mass of solid and water after subtracting flask weight is24.6gm,density of water is 0.997g/ml,what is density of solid.

231. ## westbrook high

18.75 tons= how many lbs?

232. ## Math (Algebra)

The ratio of three positive integers is 2:4:5 and their least common multiple is 300. What is the sum of the smallest and the largest of the three numbers?

233. ## life orentation

Identify and describe 3 environmental health hazards that cause ill heath,crises,and or disasters within the community

234. ## History HELP!

In history, I am learning about the civil war and I need to answer the following question: Finish the following sentences: 1. In the East the Union faced defeat, although 2. Although it was costly, the Union victory at Antietam Thanks so much!

235. ## Algebra

Given f(x)=2x^2 + 9x − 7and g(x)=2x −6, find the following. (If an answer is undefined, enter UNDEFINED.) f(−2) − g(−2)

tan-1=43\9.3

237. ## maths---urgently needed

range of sin(siny) +cos(siny)

238. ## life orientation

5 ways in which the human or environmental problem impacts on the community .provide relevant sources to support your claims.

239. ## agricultural science

Outline and explain the objectives fencing a farm land

240. ## Calculus

find the equation of the tangent line to the graph of y= f(x) = ln (x)/x at the point (1,0)

241. ## islah publek school

a rectangular garden has a perimeter of 140m.its width is three quarter of its length. what is the length and width?

242. ## math

In a collection of nickels, dimes and quarters, there are twice as many dimes as nickels, and 4 fewer quarters than dimes. The total value of the coins is \$5.75. How many nickels are there in the collection ?

243. ## life orientation

List 5 ways in which homelessness is problematic to the community

244. ## math

Find f’(x) if f(x) = 3^g(x) where g(x) = LOG_3(x^2 - √x + 4/x + 10*LOG_e(x))

245. ## Math

67 4/7 - 17 How do do this one? Do I need to bother because the fraction has nothing to subtract with but the whole numbers do

246. ## life orientation

ways in which one can take responsibility to provide safe and healthy living environment

247. ## physics urgent

a metal sample carrying a current along X-axis with density Jx is subjected to a magnetis field Bz(along z-axis). the electric field Ey developed along Y-axis is directly proportional to Jx as well as Bz. the constant of propotionality has SI unit. 1.

248. ## hiv/aids management)

discuss the benefits and drawbacks of having a vegetarian diet for people with aids.

249. ## Math

If you have 25 poles at 24'' foot long and your cut the poles 7'' 7/8 how many posts would you have altogether

250. ## science

why is a blue star cuz of temperatuure or location

251. ## math

At the Had Matter's coffee party, he has 11 different types of cups, and 6 different types of ground coffee beans. The Had Matter insists that no two people who attend his party can be drinking from the same type of cup with the same type of ground coffee

252. ## math

If the length of a rectangle is 4 more than 3 times the width, and the perimeter is 32 meters, what are its dimensions? Please enter your answer as two numbers without the units, separated by a comma.

253. ## life orientation

describe the life style disease / behaviour and explain 5 or more factor that contribute to the disease

254. ## math

what is the literal equation for v+f-e=2