# Questions Asked onDecember 8, 2012

1. ## Chemistry

Use the data given below to construct a Born - Haber cycle to determine the electron affinity of Br? DH°(kJ) K(s) → K(g) 89 K(g) → K⁺(g) + e⁻ 419 Br2(l) → 2 Br(g) 193 K(s) + 1/2 Br2(g) → KBr (s) -394 KBr(s) → K⁺(g) + Br⁻(g) 674 I know

2. ## Chemistry

On another planet, the isotopes of titanium have the following natural abundances. Isotope 46Ti Abundance 70.900% Mass(amu) 45.95263 Isotope 48Ti Abundance 10.000% Mass(amu) 47.94795 Isotope 50Ti Abundance 19.100% Mass(amu) 49.94479 What is the average

3. ## thermodynamics

if a pump discharges 75 gpm of water whose specific weight is 61.5 lb/ft^3(g=31.95fps^2). find a) the mass flow rate in lb/min, and b) and total time required to fill a vertical cylinder tank 10ft in diameter and 12ft high.

4. ## Chemistry

To treat a burn on your hand, you decide to place an ice cube on the burned skin. The mass of the ice cube is 16.0 g, and its initial temperature is -11.4 °C. The water resulting from the melted ice reaches the temperature of your skin, 31.0 °C. How much

5. ## Chemistry

The equation for photon energy, , is where = 6.626×10−34 (Planck's constant) and = 3.00×108 (the speed of light). What is the wavelength, , of a photon that has an energy of = 3.99×10−19 ? How do go about solving this? I multipled the constant w/

6. ## Margaret

____1__ young people may be able to list the many accomplishments of the Reverend Dr. Marting Luther, King jr. They may know that he was a civil rights leader who aspired to achieve racial harmony and was an __2__ of peaceful but direct action. They may

7. ## Chemistry

Iron crystallizes in a body–centered cubic structure. The volume of one Fe atom is 9.38 x 10–24 cm3, and the density of Fe is 7.874 g/cm3. Find an approximate value for Avogadro’s number.

8. ## Math

Three people who work full-time are to work together on a project, but their total time on the project is to be equivalent to that of only one person working full-time. If one of the people is budgeted for one-half of this time to the project and a second

9. ## English

Which of the following sentences contains an abstract noun? A. I hope that we are not late. B. Respect must be earned. C. They did a good job planning the party. D. She thought we should have left earlier. I think the answer is "B" "Respect" must be

10. ## English

Which of the following sentences is the underlined verb is the the future perfect tense? A. By that time, he "will have been" gone for three days. B. Jean's daughter "has begun" to drive. D. She really should "begin" to pack C. They "will take" the dog to

11. ## Physics

A box is sliding up an incline that makes an angle of 15.0 degrees with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box and the surface of the incline is

12. ## English

Which one of the following sentences contains an abstract noun? A. She handed him the dishtowel B. His skill was legendary. C. The vase was quite expensive. D. Logic is easily understood. I think the answer is "D"

13. ## Physics

While stationary on a boat you are measuring the time it takes for the coin to leave your hand and hit the water.In order to measure that time you are tuned to the sound of the coin hitting the water. You know that it takes 5.5 seconds for the coin to

14. ## psychology

According to Freud, a boy's identification with his father is usually the result of the overwhelming power of a) !@#\$%^& envy. b) ovarian envy. c) moral anxiety. d) castration anxiety.

15. ## Physics

A rapidly changing magnetic field in any region of space induces a rapidly changing A.Magnetic field or B.Electric field? which in turn induces a rapidly changing A.Magnetic field B.Electric field?

16. ## thermodynamics

the mass of a fluid system is .311 slug, its density is 30lb.ft^3 and g is 31.90fps^2. a) find the specific volume, b) the specific weight, and c) total volume

17. ## Intro to health care mgmt

Select one of the following as your department/issue. • Surgery Unit: The surgery unit is consistently starting surgery late, which is causing delays in all subsequent procedures. • Environmental Services: It is taking an excessive amount of time to

18. ## skyiline college

A compound of carbon, hydrogen, and oxygen was burned in oxygen, and 2.00g of the compound produced 2.868 g CO2 and 1.567 g H2O. In another experiment, 0.1107 g of the compound was dissolved in 25.0 g of water. This solution had a freezing point of -0.0894

19. ## Chemistry

Write a balance equation for the reaction of nitric acid (HNO3) with each base solution : . NaHCO3, . MgCO3. ( Please include the phases of the substance)

20. ## Finding the Molecular Formula

A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760 mm Hg. If the empirical formula of this compound is CH, what is the molecular formula of this compound? I had some ideas as to

21. ## Physics

A car weighing one ton is moving at 50km/hr and a truck weighing two tons is moving at 25km/hr. Both are moving in the opposite direction, which has more momentum? I think they are the same, but want to make sure

22. ## Math

Acton choose from two loans offersS: 12,000 at 8% simple interest for 9 months: or a 12,000 9 month discounted loan at 7% discount. Based on the actual interest paid and the true rate on the discounted loan, which of the two loan offers will Acton choose?

23. ## English

I have an essay due Sunday, so could someone read my writing? If there are any unclear points, please ask questions for clarity. You may also point out spelling/grammar errors, but please to not tell me what to rewrite to fix the errors. Thanks! Throughout

24. ## problem solving

Assuming that you breathe once in every 12 seconds, how many breaths do you take in 4 weeks? You must show the use of units.

25. ## Physics

A 400 kg baby grand piano is raised to the roof of a 100 m building. If the cable breaks as it reaches this height, what will its velocity be the instant prior to impact? Use energy considerations and verify using kinematics.

26. ## Physics

Brain buster: A laser sends red light of wavelength 650 nm from air into water in a swimming pool. The index of refraction of the water is 1.33. (a) What wavelength will the light have in the water? (b) What colour would light of this wavelength appear if

27. ## Chemistry

KF has the same type of crystal structure as NaCl. The unit cell of KF has an edge length of 5.39 Å. Find the density of KF in g/cm3

28. ## psychology

Ed, who suffers from dementia, has enormous difficulty getting dressed in the morning because he cannot plan and organize the behaviors necessary to complete the task. Ed's difficulty is in the area of A) executive function. B) agnosia. C) apraxia. D)

29. ## Chemistry

TRUE OR FALSE? 1) A solution that is made out of 1.00mol/L ammonia and 0.50mol/L of ammonium chloride is a basic buffer. 2) The pH at the equivalence point of a weak base with a strong acid is expected to be less than 7 because the acid that is added is

30. ## chemistry

how many liters of ammonia are required to react with 1 mole of oxygen gas at 850 degrees centigrade and 5 atm in order to produce nitrogen monoxide and water vapor at the same conditions

31. ## Physics

I calculated tan and sin (theta) for a physics lab experiment -- two-slit interference I had to use this equation y = L tan (theta), with y = 0.25 and L = 2 and tan (theta) came out to be 7.12 in degrees and 0.1243 in radians. I found sin (theta) by using

Why is the following situation impossible? A librarian lifts a book from the ground to a high shelf, doing 20.0 J of work in the lifting process. As he turns his back, the book falls off the shelf back to the ground. The gravitational force from the Earth

33. ## Physics

A crate, which has a mass of m= 45 kg, is being accelerated at 3.2m/s^-2 up an frictionless inclined plane, which meets the horizontal at an angle of 35 degrees, by a rope. What is the magnitude of the normal force acting on the crate? What is the tension

34. ## maths

the area of a triangled triangle is 40 times its base.what is its height?

35. ## Applied Behavioral

Orlando and Inez never really exercise.. Research tells us that they are ast lower risk for 1. diabetes 2. mental impairment 3. bone fracture due to osteoporosis 4. none of these; they have a higher a risk of diabetes, mental imparment, and osteoporotic

36. ## English

Which of the following statements is true regarding sentence components? A. Often the subject will act upon the object B. The predicate can be a noun or a verb. C. Every sentence must have an object. D. The object can be a noun or a verb. I think the

37. ## chemistry

The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 2.091×10−3 M−1s−1. What is the initial rate of reaction in a reactor

38. ## Math

Anna Cavanaugh loaned her friend Jason 1,000 for 6 months at 6% simple interest. what is the future value of the loan and how much finance charge will Jason pay?

39. ## Real Estate Finance

A \$100,000, 30 year fixed rate mortgage at 8% interest has monthly principal and interest payments of \$733.76. What is the loan balance after the first payment?

40. ## English

In which of the following sentences is the underlined word a pronoun? A. "Those" are James' favorite shoes. B. "These" apples are rotten. C. Making "these" cookies wasn't easy. D. We must return "those" books to the library. Note the underlined words are:

41. ## maths

vinit sold a watch to alex at a gain of 12%and alex sold it to Priya at a loss of 5%. if Priya paid rs.1330 for it,how much vinit pay for the watch?

42. ## Physics

If one drops a sphere and a piece of paper from the same height of 10 meters(H=10m) and the sphere hits the ground in 1.4 secs and the paper in 2 secs, what is the gravity associated with the sphere and why did the impact time change between the paper and

43. ## maths

the difference between the two selling prices of a shirt at profits of 4% and 5% is rs, 6.find the c.p. of the shirt and 2 s.p. of the shirts?

44. ## English

In which of the following sentences is the underlined word an object pronoun? A. "You" really should apologize to her. B. I would like you to listen to "me". C. I gave "her" a gift for her birthday. D. We returned "our" books to the library. Note: the

45. ## pre calculus

How many gallons of gas is in a cylindrical tank (that is laying on it’s side, the circular bases are vertical, the diameter of the bases are 5 feet, the length of the tank is 8 feet, the gas is at a 2 ft level)?

46. ## Re: chemistry

The average pH of open ocean water is 8.1. What is the maximum value of [Fe3+] in pH 8.1 seawater if the Ksp of Fe(OH)3 is 1.1*10^-36? chemistry - DrBob222, Friday, December 7, 2012 at 10:14pm Fe(OH)3 ==> Fe^3+ + 3OH^- pH = 8.1 pH + pOH = pKw = 14

47. ## math

help me with missing number input 1 2 3 4 5 output, 2 , 5, 10, ?,26

48. ## statistics

Ramdom sample of 41 car owners results in a mean of 7 years. Population standard deviation of 3.75 years. Find a 95% confidence interval for the true population mean..My answer is (5.9, 8.1) but having problems with margin of error

49. ## Applied Behavioral

Jordan and Dominique met at work and it appears aht they are falling in love. /for the last few months they have usually had lunch together .. They both express a feeling of tingles when ever they are together. Stembert would describe them as experiencing

50. ## physics

A loaded truck can accelerate at 4.1 m/s 2 . It loses its load so that it is only 0.8 as massive. By what factor must the acceleration change for the same driving force?

51. ## math

estimate the percent of the number 17% of 23

52. ## urgent -plsee

the cost of 6 cows are same as cost of 8 goats. if cost of 9 cows and twice numbered goats is rs. 9000, then find the cost of 3 cows and 6 goats?

53. ## -plse help me..

ABCD and ABDE are parallelograms, the value of ar[ABCD] /ar[ABC]+ar[ABD]+ar[ABE]

54. ## Science

Define heat in science terms

55. ## problem solving

Suppose water flows from a shower at a rate of 0.38 cubic feet per minute. Do you use more water by taking a 14-minute shower or by filling a bathtub with 0.6 cub yards of water, and by how much? Demonstrate strep-by-step solution.

56. ## Math

Find the equation of the line that passes through the pair of points. Write your answer in slope-intercept form (2,-5)(2,-1)

57. ## economics

Consider the following news headline....Canadian minister of defence announces \$9million purchase of 65 new fighter jets. Assuming that aggregate out put is demand determined and that the f-35 jets are purchased domestically what will be the effect of this

59. ## math

calculate the area of a triangle with side lengths 83.75, 110.65, and 90

60. ## Physics

If a sphere and paper are dropped from 10 meters and the sphere hit the ground in 1.4 seconds and the paper hit in 2 seconds, why did the impact time in case of the piece of paper change in comparison to the sphere? A. a=(Wt-R)/m;a=g B. a=(Wt-R)/m;a>g C.

61. ## statistics

Compare the 95%(6.214,7.686) and 99% 95.944,7.956)confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs.

62. ## math

i told some of my classmates about this site and they said it really help but they also added that you all shall show examples when you are finished and an explanation and then give the person a sum similar to that.

63. ## math

2 boats left the harbour at the same time. One travelled at 10km/h on a course of 47 degrees. from the north. the other travelled 8km/h on a course of 79 degrees. how far apart were the boats after 45 minutes to th nearest tenth of a kilometre.

64. ## Physics

You are travelling in your car at 50km/hr, your friend is traveling at 25 km/hr, both have the same mass. What distance do you need to travel to stop compared to the distance that your friend needs to stop? How will the stopping distance change if you and

65. ## Bio 101

hw diversification impedes in the way organisms are classified

66. ## problem solving

Suppose that two current exchange rates are US \$1= 117.9 Japanese yen and 1 Cuban Peso= \$.0476. What is the value of 1 peso in Japanese yen?

67. ## Physics

There is an attractive force between all objects. Do you feel yourself gravitating towards massive buildings in our vicinity? I believe the force is negligible because it's so weak, is that correct?

68. ## problem solving

Suppose your car gets 36 miles per gallon of gasoline, and you are driving 45 miles per hour. Using unit analysis, find the number of hours it takes to use 1 gallon of gas. I got 48 minutes but I'm not sure.

69. ## Physics

If your own mass is 70kg and the mass of a building is 4x 10^6kg and the distance between you and the building is 1m, in comparison to your own weight, estimate the force of attraction between you and the building.

70. ## physics (coulombs law)

a charge +6 C experiences a force of 2mN in +x direction. a)what was the electric field there before charge was placed ? b)describe the force which a -2c charge would experience if it is located at the point in place of the +6c for a) i assumed the charge

71. ## Physics

In a vacuum, which colour of light travels fastest  red, blue, or green? Explain. Which colour travels fastest in a block of glass?

72. ## Chemistry

KF has the same type of crystal structure as NaCl. The unit cell of KF has an edge length of 5.39 Å. Find the density of KF in g/cm3

73. ## math

convert 5/8 to a decimal

74. ## Cultural Anthropology 101

Typical characteristics of Band societies include dependence on outside populations to acquire resources. (****) exploitation of local plants and animals. development of permanent settlements. accumulation of material wealth. my answer(****)

75. ## problem solving

You need to put a carpet in a rectangular room that measures 13 feet by 22 feet as a cost of \$19.50 per square yard. Assuming that you can buy precisely the amount of carpet you need, how much will the carpet for the room cost? Demonstrate step-by-step

76. ## History (Industrial Revolution)

Can you give me an outline of the Industrial Revolution?

77. ## Chemistry

Methyl salicylate, C8H8O3, the odorous constituent of oil of wintergreen, has a vapour pressure of 1.00 torr at 54.3oC and 10.0 torr at 95.3oC. a) What is its vapour pressure at 25oC? b) What is the minimum number of liters of air that must pass over a

78. ## physics

a 3.5 kg bowling ball is 6.5 m above the ground. How much potential energy does it possess?

79. ## Astronomy

Enter the expression for kinetic energy ( ) below. Use m_1 for mass and v for velocity.

80. ## math

find the value of G in the equation G/5-13=42

81. ## Math

Which is greater 5.71 or 5.2453? Explain

82. ## statistics

Compare the 95%(6.214,7.686) and 99% 95.944,7.956)confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs.

83. ## immunology

- Case scenario: explain why the likelyhood of allergies can be inherited from parent to child but the type of allergy (e.g. peanuts) cannot. I am a bit confused, any one can help me solved thanks.

84. ## Chemistry

For a reaction: AB arrow A+B, rate=k[AB]^2and k=0.2L/mol.s a)how long it will take for [AB] to reach its initial concentration of 1.5M

85. ## chemistry

what is the concentration of the hydroxide ion in a solution if .12 mol of strontium hydroxide are dissolved in water and the final solution volume is 500. mL?

Thank you!

87. ## English

In which of the following sentences is the underlined word an object pronoun? A. "You" really should apologize to her. B. I would like you to listen to "me". C. I gave "her" a gift for her birthday. D. We returned "our" books to the library. Note: the

An equilateral triangle of side 14 centimeters is revolved about an altitude to form a cone. What is the number of cubic centimeters in the volume of the cone? Express your answer to the nearest whole number, without units. how do we do this?!

89. ## music

do all double-reed and single-reed instruments belong to the woodwind family?

90. ## math

divid the fraction 14/27 by the fraction 2/3 and reduce your answe to the lowest terms

91. ## Pressure and Molecular Formula

2. How much potassium chlorate is needed to produce 20.0 mL of oxygen at 670 mm Hg and 20 degrees C. 3. A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760 mm Hg. If the empirical

92. ## ECE

To become a successful obeserver of young children, which of the following techniques is most effective?

93. ## Cultural Anthropology 101

Could some one PLEASE check my answers Competition among co-wives in a polygynous household is reduced when: ****(a) Sororal polygyny is practiced. co-wives all live in the same household and share the same kitchen. the wives all live together. the

94. ## Computer Science

I need some help about Turing Machines, and prove by reductions. Here are the 2 questions: 1. Sketch the construction of a Turing Machine that decides the language L = a^i where i is not prime. 2. Show that the language 2Strings is not recursive by

95. ## ABNORMAL psychology 220

Tommy is a 43-year-old man who has Down syndrome. Recent research indicates that he is likely to develop A) Parkinson's disease. B) Alzheimer's disease. C) Pick's disease. D) multiple sclerosis.

96. ## math

convert the mixed number 14 5/7 to a mixed decimal. round to the nearest hundreth

97. ## math

round the number 43,678.426785 to the nearest ten thousand

98. ## English

To show emphasis, what helping verb would you use to fill in the blank in this sentence? I _______ think I have master French prounciation. A. might B. must C. do D. can I think the answer is "C" I do think I have master French prounciation.

99. ## maths

integrate -sinx/ã4+cos^2x dx

100. ## Math

Are these quadrilaterals parallelograms? (quadrilateral ABCD with diagonals intersecting at E) 1. AB is congruent to AD and AB is parallel to DC 2. AB and DC are congruent and parallel 3. DE and BE are congruent

101. ## Math

Find the ages of John and Mary if four times John's age equals three times Mary's age, and Mary is ten years older than John.

102. ## Social Studies

How did mining help the west grow?

103. ## Social studies

What were boomtowns and ghost towns?

104. ## math

A 154-lb person burns 420 calories per hour riding an exercise bicycle at a rate of 15 mi/h. Write a function rule to represent the total calories burned over time by that person. Explain how the information in the problem relates to the function. Thank

105. ## World Cultures

What role did Greeks play in the Maurya Empire creation? How did Ashoka develop Maurya power and prestige?

106. ## math

convert 5/8 to a decimal

107. ## english 11

What surprising action does Locust take at the end of the story? (1 point)He scratches on the eight ball. He shows up at the Lemon Tree Billiards House.*** He turns himself in to the local authorities. He sets Mitch up with his daughter. help? not sure if

108. ## statistics

The latest in the "You may be a redneck if . . . " genre has produced a simple questionnaire. If more than 80% of the questions are answered in accordance with redneck"philosophy" (e.g., "You may be a redneck if grade 4 was the best 5 years of your life")

109. ## statistics

5) The lifetime of a medical device s a normally distributed rv with standard deviation of 2 years. An experiment is conducted to test 15 medical devices and find their lifetimes to be: a. If the population mean is known to be 15 years, what is the

110. ## Accounting

1. A manager is considering the following investment: Initial capital investment \$180,000 Estimated useful life 3 years Estimated disposal value in 3 years 0 Estimated annual savings in cash operating costs \$80,000 Minimum desired rate of return 10% The

111. ## math

find the maximum area of a rectangle whose perimeter is 50 yards

112. ## Social Studies

In what ways did China And Europe parallel each other in their development until the sixth century CE? How did they diverge after that?

113. ## chemistry

supposthat the surface area of the box reduced by half , what effects this will has on the coeficint of kintic and static friction

114. ## chemistry

supposthat the surface area of the box reduced by half , what effects this will has on the coeficint of kintic and static friction

115. ## math

a lumberyard makes picnic tables for \$87.00 and sells them for \$127.89. what is the percent markupbon each picnic table based on cost?

116. ## English

Which of the following sentences contain a verb in the future tense? A. By that time, he will have been gone for three days. B. Jean's daughter has begun to drive. C. She really should begin to pack D. They will take the dog to the park with them. I think

117. ## Economics

Opera CD buyers are located in New York and Los Angeles. At the current price for a CD, \$25 in both New York and Los Angeles, aggregate demand for Opera CD is 10,000 units (i.e. the sum of the demand in New York and Los Angeles); and the price elasticity

118. ## chemistry

0.0386mol glucose in 88.0ml of solution

119. ## science

Consider a single electron in a 1dimensional box with size a, What is the expected position of the electron at the second excited state? What is the expected value of linear momentum at the ground state ?

120. ## Cell Biology

1. Which molecule is the major contributor to the increase in mass observed in a full grown plant (i.e. tree) compared to a plant seed? I'm thinking it could be either of these three: D-glucose, C02, or H20.. help?

121. ## physics

a Geiger ionization chamber contains 60 cubic cm of air and records 500 mR/min. calculate (a). the current produce by the chamber (b). the total number of ion pairs produced per hour of exposure. please answer, thank you!,

122. ## ETH 125

Discuss the ways that white ethnics have encountered prejudice and discrimination. Provides Specific examples.

123. ## physics

a radiation survey meter observed gamma radiation of 150 mR/hr. The air field ionization chamber has a volume of 580 cubic cm. If the electron generated by the radiation in the chamber are swept out by an electric field, what is the current produced?

124. ## chem

As little as 1.oomg of Arsenic in 1-L of water can kill you. Calculate the following. Assume the density of the solution is 1.00g/cc. a.) How many moles of arsenic in 1 mg? b.) What is the mass percent of the solution? c.) What is the concentration in ppm

125. ## chemistry 101

If 15g of NaOh is dissolved in 285 g of water, calculate the following. Assume the density of the solution is 1.06 g/cc. a) Calculate the moles of NaOH in the solution? My answer is 15gNaOH/40g NaOH= .0375 mole NaOH b) Waht is the mass % w/w of the

A bat moving at 6.5 m/s is chasing a ﬂying insect. The bat emits a 37 kHz chirp and receives back an echo at 37.65 kHz. At what speed is the bat gaining on its prey? Take the speed of sound in air to be 336 m/s. Answer in units of m/s

127. ## chemistry pls help

If 10.0 mL of 1.0M HCl is added to 90 mL water, what is he concentration of the new solution? What is the pH of this solution? If the solution is titrated by 0.500M Ca(OH)2, how much volume (ml) of NaOH necessary? Need help pls.

128. ## English

Which of the following sentences contains a berb in the present tense? A. Jessica "enjoys" running. B. Grandma had "sent" us cookies. C. We "left" early. D. They are "walking" around the lake. Note" The verbs in the sentences are A. enjoys B. sent C. left

129. ## English

What is the theme of The Corporal by Richard Brautigan? I said that it was "it is sad to grow up," but my teacher says to be more sophisticated and specific

130. ## English

In which of the following sentences is the underlined word a past participle? A. We "helped" Joan to pack her things. B. Jenna has "driven" this route mulitple times. C. I was "working" overtime for about six months. D. She would "like" to join us. Note:

131. ## english

How can the A Plan of Action help you address a current problem or challenge you are having with school?''

132. ## Applied Behavioral

According to your text, jarjuana has been successfully used to treat 1. nausea and glaucoma 2 depression and nausea 3 alcoholism and stomach ulcrs 4 nausea and stomach ulcers my answer is nausea and glaucoma

133. ## algebra

A weather balloon is directly west of two observing stations that are 10 miles apart. The angles of elevation of the balloon from the two stations are 17.6 degrees and 78.2 degrees. How high is the balloon?

134. ## Physics

A spring has an equilibrium length of 20.0 cm and a spring constant of 57.9 N/m. The spring is connected to the underside of the roof of a car and a 0.294 kg block suspended from it. How long (in cm) is the spring when the car is at rest? How long is the

135. ## Chemistry

27) What volume of benzene (C6H6, d= 0.88 g/mL, molar mass = 78.11 g/mol) is required to produce 1.5 x 103 kJ of heat according to the following reaction? 2 C6H6(l) + 15 O2(g) ¨ 12 CO2(g) + 6 H2O(g) ƒ¢H‹rxn = -6278 kJ

136. ## statistics

Imagine that the probability of answering this question correctly is only p = .4, and on tests in which it is used, only 8 people attempt it. On what proportion of such tests will fewer than 3 people answer the question correctly?

137. ## chemistry

How many grams of sodium hydroxide is needed to react with 100 ml of a 1.4 M nitric acid for complete neutralization to happen.

138. ## Math

How do you write "3 more than the sum of x and y"

139. ## Applied Behavioral

which is the laragest preventable cause of death in the united states 1 smoking 3 alcoholiosm .3 methamphetamine use 4 Opiate ues My answer is smoking

140. ## harvard

6. For Design 3, consider the probability of a random individual in South Dorchester being sampled; and the probability of a random individual in Harbor Islands being sampled. These probabilities are approximately the same as the probabilities calculated

141. ## physical

At what age does exercise begin to result in strength in boys and girls?

142. ## Algebra

8s+ 12 = 16, 6s+ 9t = 12 solve by substitution

143. ## health

Which the following should be used to clean in educational or child care facilities?

144. ## economics

Using the saving and investment identities from the national Income Accounts to answer the following questions. Suppose the following values are from the national income accounts of a country with a closed economy. Y=\$900 billion T= \$200billion C=\$500

145. ## Cps

HCl+CaCO3 --> CaCl+H3O balanced?

146. ## maths

c=√d/ab ,make d the subject.

147. ## English

At what point does abigail first begin feeling cold

149. ## urgent -plsee

Let a,b,c be positive integers such that a divides b^2 , b divides c^2 and c divides a^2 . Prove that abc divides (a + b + c)7 .

150. ## Physics

Five Forces act on an object: 1. 60 N at 90 degrees 2. 40 N at 0 degrees 3. 80 N at 270 degrees 4. 40 N at 180 degrees 5. 50 N at 60 degrees What are the magnitude and direction of a sixth force that would produce equilibrium?

151. ## math

subtract the fraction 74/5 from the fraction 18 6/15 and reduce your answer to the lowest terms.

152. ## general

Which of the following would you use to sort through slides for a slide presentation? a. camera b. opaque projector c. copy machine d. light box

153. ## Physics

An airplane has an effective wing surface area of 17 m2 that is generating the lift force. In level flight the air speed over the top of the wings is 63.9 m/s, while the air speed beneath the wings is 58.0 m/s. What is the weight of the plane? Answer in N

154. ## harvard health

4. True or False: Using this design, a relative who served as a control cannot be included as a case if he later develops the cancer of interest. T/F???

Jacksonville Technical College received 3,445,553 in state aid on September 15 for the fall semester, 2,000,000 was invested on a 2 month investment that pays 11.5% interest. How much interest will be earned?

156. ## science

Urbium (Ur ) is an upscale element found in big cities. Its oxide UrO2 is not very stable and decomposes readily at temperatures exceeding 66 degree celsius. The figure below shows how the rate of reaction varies with the concentration of UrO2 at 75 degree

157. ## science

A steel cable 10 m long is pulled in tension with a stress of 350 MPa. Assume that the Young's modulus of the steel cable is about 200 GPa. If only elastic deformation occurs, what is the resultant elongation in cm?

158. ## Speech

Contemporary communication studies now refer to public speaking as a form of __________ communication. A. group B. organizational C. public D. interpersonal

159. ## accounting

The balance in the allowance for doubtful account is \$30,000 credit. You write off \$18,000 on a specific invoice to Bob. Later, Bob pays you \$2000 on these written off invoices. At year-end, you estimate that \$25,000 of invoices will not be collectible.

160. ## accounting

You issue a \$120,000 bond at par on March 31 due in 10 years that pays 11%. You pay interest on September 30. You pay off the bond ten years later. Assume that the company makes no adjusting entries. What journal entries should be recorded to issue the