Questions Asked on
September 19, 2015

  1. chemistry

    How much heat (in kJ) is required to warm 13.0 g of ice, initially at -13.0 ∘C, to steam at 111.0 ∘C? The heat capacity of ice is 2.09 J/g⋅∘C and that of steam is 2.01 J/g⋅∘C.

    asked by Alexus
  2. Chemistry

    A solution containing 0.0158 M maleic acid and 0.0226 M disodium maleate. The Ka values for maleic acid are 1.20 × 10-2 (Ka1) and 5.37 × 10-7 (Ka2). What is the pH of the solution ?

    asked by Alex
  3. Chemistry 101

    I have been attempting this problem so many times. I don't know if I am plugging in the numbers correctly but I cannot seem to get the answer correct. Please help! A patient arrives in the emergency room with a burn caused by steam. Calculate the heat, in

    asked by Sabrina
  4. Biology

    Which statement is not true regarding illness associated with malfunctioning cellular organelles? The illness _____ a. can result in a diverse set of sumptoms b. may impact multiple body systems c. is typically simple to diagnose d. may be lethal

    asked by Gina
  5. Physics

    A 11.0-µF capacitor and a 50.0-µF capacitor are charged by being connected across separate 55.0-V batteries. (a) Determine the resulting charge on each capacitor. (b) The capacitors are then disconnected from their batteries and connected to each other,

    asked by Nick
  6. Biology

    1.A white flowered plants is crossed with a plant that is heterozygous for the trait. What percentage of he offspring will have purple flowers? 2.Two plants, both heterozygous for he gene that controls flower color are crossed. What percentage of their

    asked by Gina
  7. P6 maths

    Mrs Wong baked some pizzas for her students. The boy received twice as many pizzas as the girls. There were as many girls as boys in the class. Each girl ate 4/9 of a pizza and they finished all pizzas that were given to them. Each bot ate 3/4 of a pizza

    asked by John
  8. Physics

    If the electric field inside a capacitor exceeds the dielectric strength of the dielectric between its plates, the dielectric will break down, discharging and ruining the capacitor. Thus, the dielectric strength is the maximum magnitude that the electric

    asked by Anonymous
  9. P6 maths

    Mrs Raja and Mrs lee have some eggs to sell. If mrs raja sells 30 eggs per day and mrs lee sells 15 eggs per day , mrs lee will still have 610 eggs left when mrs raja has sold all her eggs . If mrs lee sells 30 eggs per day and mrs raja sells 10 eggs per

    asked by Ellie
  10. Muhuyuwathomba secondary

    Mathematical literacy albert need a car for 12 day,to travel 106km per day.determine the amout he'll have to pay for the corrola 1400? Assume there is no demage to the car

    asked by Ondwela
  11. BPSU

    y=ln(tan(3pi/2 -^coshx))

    asked by Aldrin santos
  12. algebra

    How do you write,45 less than the sum of the other two angle

    asked by rhonda
  13. statistics

    The cholesterol levels of adult American women has a mound-shaped and symmetric distribution with a mean of 188mg/dL and a standard deviation of 24 mg/dL. In what interval would you expect most American women’s cholesterol levels to be? Explain.

    asked by katie
  14. Life orientation

    Two contemporary social issues in your community

    asked by lindiwe liango
  15. English

    Posted by rfvv on Monday, August 25, 2014 at 4:45am. 1. It's been a long time. 2. It's been a while. 3. I haven't seen you for a while. 4. Long time no see. --------------- Are they all the same in meaning? Does 'a while' mean ' a long time' or 'a short

    asked by rfvv
  16. Math

    If shahida can iron 5 handkerchiefs in 7 minutes , how long will she take to iron 35 handkerchiefs.

    asked by Noor
  17. Math

    The ratio of milk to water in a container is 5:1 by volume. If the total volume of the mixture is 9 liters, find the volume of water in it.

    asked by Noor
  18. Math

    In a certain town the ratio of the number of cars to that of taxis is 15:4. If there are 172 taxis in the town , find the number of cars there.

    asked by Noor
  19. geography(development)

    Would you say that the division of the world in the northern and the southern part is based on economic development,sustainable development or social development?

    asked by melissa
  20. PHYSICS

    3 PARTICLES OF MASS 1KG,2KG,3KG PLACED AT CORNER A,B,C OF AN EQUILARERA TRIANGLE A,B AND C.LOCATE THE POSITION OF PARTICLE/FIND COORDINATES

    asked by ARYAN
  21. Math

    At a school with 100 students, 35 take French, 32 take German, and 30 take Spanish. Twenty students take only French, 20 take only German, and 14 take only Spanish. In addition, 7 students are taking both French and German, some of whom also take Spanish.

    asked by Spencer
  22. Science- Physics

    A plane mirror is mounted at the back of the truck that is moving at 25 km/h. How fast does the image of a man standing on the road seem to be moving away from him?

    asked by trsgts
  23. Science- Physics

    Two plane mirrors, A and B, are separated by 30.0 cm facing each other. An object is placed 20 cm from mirror A. Locate the first two nearest image formed by each mirror.

    asked by trsgts
  24. Math

    Solve these simultaneous linear equations using elimination method : 3a = 2b + 1 and 3b = 5a - 3

    asked by Olayemi
  25. math

    change fraction 3/4 to a percent

    asked by sue
  26. geography

    In school I have Developed, NICs (Industrialising) and Developing countries. I have done most of it. The NICs and Developing are the ones I need help with. For the NICs I have S. Korea, China, Brazil, Mexico and India and I need 3 more, for Developing, I

    asked by Damian
  27. Logarithm help

    using logarithms to solve exponential equations. 5^1+x = 2^1-x I need exact numbers. I did one on my own already. 5^x-1 = 9 5^x-1 = 9 log(5^x-1) = log9 (log5)(x-1) = log9 x-1 = (log9/log5) x= (log9/log5)-1 x = 2.3652 Logarithm help - Joe, Friday, September

    asked by Joe
  28. chemistry

    Name and draw the molecular structure of this compound CH3CH(C2H5)CH(CH3)CH(C3H7)CH2CH3

    asked by dan
  29. Math

    A fireman used a ladder with 56 rungs. The rungs are 14 inches apart and 1.5 inches thick. What is the distance from the bottom of the lowest rung to the top of the highest rung? Check if I solved correctly please. I multiplied 55*14 because there would be

    asked by Spencer
  30. ME

    Problem 3: Consider water as the substance. (a) Find the specific internal energy (Btu/lbm) when T = 500F and P = 375 psia (b) Find the pressure (psia) when T = 500F and v = 0.02024 ft3/lbm (c) Find the specific volume (ft3/lbm) when T = 500F and

    asked by sara
  31. Kwasa high school

    Three ways on how water pollution can impact negatively to the health of the people in our community

    asked by Sizwe mavuso
  32. STATISTICS

    Births are approximately uniformly distributed between the 52 weeks of the year. They can be said to follow a uniform distribution from one to 53 (spread of 52 weeks). a. X~ b. Graph the probability distribution. c. f(x)= d. u= e. o= f. Find the

    asked by BORNIUCS
  33. math

    Time taken by light to travel 1 meter is roughly 3 x 10 to the negative 8th power. pls. formulate a problem and solution.

    asked by jm
  34. child development

    Understanding Reciprocal Determinism I understand it means "individual's behavior influences and is influenced by both the social world and personal characteristics." but that's really all i understand, how would you explain this theory

    asked by anonymous
  35. English

    Jay Z has multiple sides to him; he teaches us how to be a successful person, and show us what's important in life v.s. what's not. Is this a good thesis sentence, and also can you give me example of the first part of the sentence and the last part ofd the

    asked by Mrs. Keon Meadows
  36. Physics

    Maria throws a ball straight up with an initial velocity of 10 m/s. What is its velocity at the highest point? What is its velocity when it returned to the elevation from where it is thrown ? What is its acceleration at the highest point? What is its

    asked by Joyce
  37. life orientation

    Which are the four environmental issues that cause I'll health in our communities

    asked by Thozama
  38. math

    Formulate a problem and spolution of the diameter ofvthe atomic nucleus of a lead atom is 1.75 X 10 to the negative 15th meter.

    asked by jm
  39. math

    formulate a problem to the charge on an electron is roughly 1.6 X 10 to negative 19th power columbs.

    asked by jm
  40. math

    period of a 100 MHz FM radio were is roughly 1 X 10 to the negative 8th s. formulate a problem and solution.

    asked by jm
  41. Chemistry

    C. Consider the reaction 2C3H6 + 9O2 6CO2 + 6H2O. If the rate at which C3H6 is reacting is 0.40 mol liter−1s−1, then the rate at which 1. O2 is reacting is 1.6 mol liter−1s−1 2. CO2 is being formed is 0.40 mol liter−1s−1 3. H2O is being formed

    asked by Jim
  42. English

    Hi! I'm trying to find a lit device for this quote. This quote is from "The Story of An Hour" by Kate Chopin. I'm struggling to find a lit device. So far I've come up with "contrasting diction" but I'm trying to find an even stronger one. Passage: “There

    asked by Richard
  43. Life orientation

    Critically analyze the impact of crime as a contemporary social issue on local communities and poverty on global communities

    asked by Tumelo koloti
  44. Physics

    Police find skid marks 65.0 m long on a highway showing where the car made an emergency stop. Assuming the acceleration was -10.3 m/s^ ( about the maximum for dry pavement) how fast was the car going?

    asked by Tyler
  45. Probability

    hundred people apply for three jobs. 110 of the applicants are women. (a) If three persons are selected at random, what is the probability that two are women? (Round the answer to six decimal places.)

    asked by MiMi
  46. math

    A wall has an area of 7.2 square meter. It was painted yellow and brown. The area of the wall painted yellow was 3 times as large as the area painted brown. What was the ratio of the area painted yellow to the area painted brown?

    asked by George
  47. Physics

    Using GRAPHICAL METHOD, find the vector sum of a force of 20 N directed 60 degrees east of north and a force of 60 N directed west? Please show all steps and equations used.

    asked by Alyssa
  48. Spanish

    1 of 15 I tried to get there on time, but there was an accident on the freeway: Yo ____(1)____ llegar a tiempo, pero ____(2)____ un accidente en la autopista. Options 1-quise or queria 2-hubo or habia Answers 1- quise 2 -habia 2 of 15 They refused to admit

    asked by Matt
  49. chemistry

    Bromine gas is allowed to reach equilibrium according to the equation. Br2=2Br Kc=0.0011 at 1280°C Initial concentration of br2 is 0.063M and Br is 0.012M. How to calculate the concentration of these species at equilibrium. Please help me .

    asked by han
  50. chemistry(ch1001)

    When 6.853 mg of sex hormone was burned in a combustion analysis,19.73 mg of CO2 and 6.391 mg of H2O were obtained. What is the empirical formula of the compound ?? Please be detailed...help me.

    asked by chancy xdicey
  51. CHEMISTRY !!! HELP !

    A solution containing 0.0158 M maleic acid and 0.0226 M disodium maleate. The Ka values for maleic acid are 1.20 × 10-2 (Ka1) and 5.37 × 10-7 (Ka2). What is the pH of the solution ?

    asked by Alex
  52. Relations and Function

    p (x)=x^6 a*x^5 b*x^4 c*x^3 d*x^2 e*x f

    asked by Edward
  53. phyics

    Why does the distance traveled by the ball in each half second after it is released change in the way that it does? A.Gravity is pulling down on the ball, so it accelerates down at a steady rate. B.The incline plane pushes up on the ball, so it accelerates

    asked by rachel
  54. statistics

    what is mock data? And how does it work or what do you do??

    asked by Anoymous
  55. science

    You have a different rock with a volume of 30m3 and a mass of 60 g

    asked by Anonymous
  56. Math

    Solve -12 / 3 * [-8 + (-14)2 – 6] + 2 =

    asked by Gayla
  57. phyics

    A dart leaves the barrel of a blowgun at a speed v. The length of the blowgun barrel is L. Assume that the acceleration of the dart in the barrel is uniform. Find a time that the dart moves inside the barrel. Express your answer in terms of the variables L

    asked by rachel
  58. Maths

    A mining company ha 10 000 m of fencing available.It wants to use a fencing to enclose a rectangular field. one side of the field is bordered by a river.If no fencing is placed on the side next to the river, What is the largest area that can be enclosed?

    asked by Victor Anukam
  59. AP Chemistry

    Hey guys! I'm really lost on this equation. Any help? H2(g) yIelds 2H(g)   Delta  H = 436 kJ/mol F2(g) yields  2F(g)             DeltaH = 158 kJ/mol H(g)  + F(g) yields HF(g)           DeltaH = -568 kJ/mol Calculate deltaH for:

    asked by Allie
  60. Biology

    What are the differences between primary succesion and secondary? Why are there these differences? How do I answer the second question

    asked by Anonymous
  61. geography

    what is fault?

    asked by zaini
  62. chem

    At 668K 1 mol each of CO and Cl2 are introduced into an evacuated 1.75 L flask. At equilibrium, the total pressure of the gaseous mixture is 32.4 atm. Calculate Kp. How to solve this ? Co+Cl2CoCl2

    asked by han
  63. spelling

    Please create a sentence for each word for a 6th grader: 1. partisanship 2. preconceived 3. subjective 4. blithe

    asked by f
  64. ELA

    6 events of the book the great rat hunt

    asked by Tisy
  65. Chemistry

    Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32∘C to 65∘C. (The specific heat capacity of copper is 4.184 J/g∘C.) Express your answer in Joules.

    asked by Rachel
  66. writting skills

    Once you acquire these two basic skills, you'll be able to transform a vague idea in your mind into a coherent piece of writing

    asked by deidra jones
  67. physics

    A 1100 kg car accelerates from rest to 27 m/s in 6.0 seconds. Neglecting friction, hat is the average power consumption in horsepower?

    asked by Brandi
  68. History

    The Caddo lived on a million acres of land. What characteristics of their culture demonstrated a need for vast amounts of land? A. They made and traded intricate pottery. B. They hunted Bison and raised cattle, hogs, and poultry on farms. C. They worked on

    asked by Shi Buringa
  69. chemistry

    I wonder how to calculate the Kp if the question gives us the total pressure and no of mol of reactant. Without giving the mol of product how can i calculate the Kp. Can anybody help me what to do to calculate the Kp. Here is the question im unable to

    asked by elly
  70. Social Studies

    What was the main purpose of the settlers who established Jamestown? a.to trap animals and sell furs b.to find gold and silver c.to farm tobacco d.to collect sweetgrass for baskets Would it be B? I am thinking B,or C.

    asked by AJ
  71. Geometry

    MP is the angle bisector of angle LMN Given that angle LMP is a right angle what type of angle is LMN

    asked by Anonymous
  72. MATH

    Show that C is an integer C=16*25-32*75/64*6*16 16(25-2*3*25)/16*6*64 25(1-6)/6*64 -125/384 -0.3255208 Which is a decimal and not an integer. Please help.

    asked by Dany
  73. English

    Third Person Limited Narrative ideas?

    asked by Anonymous
  74. Social Studies

    The leaders of the Virginia Company recruited more settlers and reorganized the colony. They allowed the new settlers to own land. Those settlers began to grow tobacco, a crop they learned about from the Indians. By 1612, Virginians were shipping tobacco

    asked by Trent Brown
  75. MATH

    Plastic plates come in packs of 8, plastic utensils come in packs of 12, and plastic cups come in packs of 20. What are the least numbers of packs you should buy in order to have the same number of plates, utensils, and cups?

    asked by lakshmi
  76. MATH

    X/1/3=1/2 X=

    asked by lakshmi
  77. MATH

    12/X=4 X= PLEASE SHOW WORK

    asked by lakshmi
  78. physics

    A man drops a stone into a water well on his farm. He hears the sound of the splash 3.55 s later. How deep is the well? The acceleration due to gravity is 9.8 m/s 2 and the speed of sound in air is 324 m/s. Answer in units of m Vo= something V= 324 m/s??

    asked by Anonymous
  79. Science

    If the trend in the graph continues through the summer, what would you expect the average high temperature in Louisville, Kentucky, to be in August? A. 66F B. 83F** C. 103F D. 125F I don't know how to give you think link. Any ideas?

    asked by Shi Buringa
  80. Finance

    You are planning to save for retirement over the next 15 years. To do this, you will invest $1,100 a month in a stock account and $500 a month in a bond account. The return on the stock account is expected to be 7%, and the bond account will pay 4%. When

    asked by Caroline
  81. American Government

    According to the Articles of Confederation, this power was granted to Congress. to regulate trade to enforce laws to amend the Articles of Confederation to levy taxes - This one?

    asked by Sandra
  82. math

    greg traveled from his work at an average rate of 25km/hr. By traveling 50km/hr, he took 30 minutes less to return home. how far in kilometers is his work to home?

    asked by mary joy tecson
  83. management

    which one of the following philosophies makes every employee a quality inspector for his or her own work

    asked by dina
  84. math

    Solve by substitution.. y=4x-7 and 2x-3y=6 This is the only question i am stuck on, please help..

    asked by tina
  85. Math

    Identify the build up of the Sine-Bar to represent the angle. Identify the angle in degrees, minutes and seconds of the arc. Sine29(angle), 17'(minutes),57"(seconds)

    asked by Paul
  86. World History

    Why did farming lead to larger populations?

    asked by Maryann
  87. biochemistry

    Biochemical macromolecule lab, wheat gluten was tested with glucose? is that possible it emitted a blue color.

    asked by Anonymous
  88. biochemistry

    does wheat gluten have any carbs or glucose in it?

    asked by Anonymous
  89. english

    how do you write poem?

    asked by neima
  90. Math

    Please solve 4-6x GREATER THAN -15 + 1. I believe the answer is x LESS THAN 3. Is this correct?

    asked by Jalen
  91. physics

    100 kg car moving at 22 m/s runs into a horizontal spring with spring constant 4200 N/m. How far does the car displace the spring before coming to a stop? Please show your work.

    asked by Brandi
  92. Physics

    When a 0.111 kg mass is suspended at rest from a certain spring, the spring stretches 3.90 cm. Find the instantaneous acceleration of the mass when it is raised 6.20 cm, compressing the spring 2.30 cm.

    asked by Stacey
  93. physics

    Vector A has magnitude 8.0 units at an angle of 60o from the x-axis. Vector B has magnitude 6.0 at an angle of -30o from the x-axis. Find the magnitude and direction of vector C = A + B I tried actually drawing it to see if it would help but it didn't I'm

    asked by JOHN SMITH
  94. Chemistry

    I am really lost with this. Calculate the amount of energy released in kJ/mol for the fusion reaction of two 1H atoms to yield a 2H atom and electron: 1/1H+1/1H→2/1H+0/1e The atomic masses are 0/1e (0.0005486 u), 1H (1.00783 u), 2H (2.01410 u), and 3He

    asked by Bob
  95. Language Arts

    At the end of her aunt's story in "The Story-Teller" the older girl ask whether the girl in the story would have been rescued even if she had not been good. What does she seem to think the theme of her aunt's story? What detail in the aunt's story leads

    asked by Candy
  96. English (Please, Check My Answers)

    Insert quotation marks, capitals, and other required punctuation. 1. Do you think Miss Muren asked that you can be ready by noon A: "Do you think Miss Muren asked that you can be ready by noon?" 2. Get out there and fight for the ball yelled the coach 3.

    asked by Victoria
  97. Physics

    The mass of a satellite is 2 Kg. Assuming that the mass is evenly distributed throughout the satellite, calculate the moments of inertia about the X, Y and Z axes.

    asked by Darrin
  98. ALGEBRA

    A rectangular garden is 30 ft wide. If its area is 2700 ft{}^2, what is the length of the garden?

    asked by JHON
  99. Chem

    What is the concentration of a solution made by diluting 85 mL of 6.0 mg/L free chlorine to a final volume of 750 mL?

    asked by Z
  100. Logarithm help

    Write each expression as a single logarithm I need help really fast. I have to finish this by today. log4^3 + 1/2log4^8 - log4^2

    asked by Bob
  101. Math

    The circumference of a circle varies directly from its diameter. If the circumference of the circle having a diameter of 7cm is 7 cm, what is the circumferences of the circle whose diameter is 10cm? 18cm? 20cm? a. Write a mathematical statement that relate

    asked by Jennylyn
  102. Chemistry Help!

    When C2H4O2 burns in oxygen, the products are carbon dioxide and water. How many grams of water are obtained from burning 4.76 g of this substance? How would I solve this problem?

    asked by wdym
  103. physics

    A rocket is fired at an angle from the top of a tower of height h0 = 65.5 m . Because of the design of the engines, its position coordinates are of the form x(t)=A+Bt2 and y(t)=C+Dt3, where A, B, C , and D are constants. Furthermore, the acceleration of

    asked by justin
  104. Math

    The service fee f of a physical therapist varies directly as the number of hours n of service rendered. A physical therapist charges Php 2,100 for 3 hours service to patients in a home care. How much wolud he be paid for 6 1/2 hours of service?

    asked by Jennylyn
  105. Math

    If an angle is 20 degrees less than thrice its supplement, find the ratio of the angle to its supplement. Thanks

    asked by Janella
  106. physics

    A 15-V battery is hooked up to three resistors in series. The voltage drop across the first resistor is 3V and the voltage drop across the sencond resistor is 10V. What is the voltage drop across the last resistor? I don't understand what equation to do

    asked by Grace
  107. Math

    The amount of paint p needed to paint the walls of a room varies directly as the area A of the wall. If two gallons of paint is needed to paint a 40 sq meter wall, how many gallons of paint are needed to paint a wall with an area of 100 sq meters?

    asked by Jennylyn
  108. Calculus

    I don't know limits fairly well. The problem is prove the limit using definition 6, lim x -> -3, 1 / (x+3)^4 = infinity. The books definition for definition 6 is, let f be a function defined on some open interval that contains a, except possibly at a

    asked by Anonymous
  109. Math

    105 students were asked if they liked soccer, rugby, or football. 4 liked only rugby, 40 liked rugby, 12 liked only rugby and football, 63 did not like football, 21 didn't like any, 16 liked only soccer and football, 60 liked soccer. How many liked only

    asked by Spencer
  110. Calculus

    If the function f is defined by f(x)=0 if x is rational f(x)=1 if x is irrational prove that lim x-->0 f(x) does not exist. Can someone help me answer this question step by step so I would know how to prove a question like this next time? Thank you.

    asked by Anonymous
  111. jules

    Science

    asked by tumi
  112. phyics

    A car takes 11 s to go from v=0m/s to v = 22 m/s at constant acceleration. If you wish to find the distance traveled using the equation d=1/2at2, what value should you use for a? Please help on this i don't know what i should put i think m/s squared but i

    asked by rachel
  113. Chemistry

    Lead has a density of 11 g/ml. Mercury has a density of 13.6 g/ml. How much more volume would 1 pound of lead occupy the one pound of mercury?

    asked by Katie