Questions Asked on
June 16, 2015

  1. Chemistry

    Equilibrium constants at 25 ∘C are Substance Kc Value of Kc CaCO3 Ksp 4.5×10−9 H2CO3 Ka1 4.3×10−7 Ka2 5.6×10−11 What is the molar solubility of marble (i.e., [Ca2+] in a saturated solution) in acid rainwater, for which pH=4.20?

    asked by Samantha
  2. Algebra

    in what form is the following linear equation written? 3x-2y=4 A.rise-run B.standard C.slope-intercept D.point-slope

    asked by karla
  3. maths

    A can is 12cm high and diameter 8cm. Using the formula v =TT how much liquid is in the can

    asked by sue
  4. mathematics

    Lily Adams purchased a $1,000 bond at 70. The bond pays 4% What was the cost of the bond? What was the annual interest? What is the yield (to the nearest tenth of a percent)? (please only post of you know answer or at least will tell me how to get the

    asked by Anonymous
  5. mathematics

    Find I. Choose the correct answer. Amount Financed (m) = $1,400 Number of Payments per year (y) = 12 Number of Payments (n) = 24 Total Interest (c) = $200.50

    asked by Anonymous
  6. mathematics

    Jane Investor purchased a $10,000 bond at 90. The annual interest is 5%. What was the cost of the bond? What was the annual interest? What is the yield (to the nearest tenth of a percent)?

    asked by Anonymous
  7. Spanish

    11. Wake up early! A. ¡Acuéstate temprano! B. ¡Despiértese temprano! C. ¡Tú te despiertas temprano! D. ¡Me despierto temprano! E. unable to answer Answer: B 12. Cuando Luís montaba a caballo, siempre _____________ al suelo. A. caiga B. cayó C. se

    asked by Anonymous
  8. Algebra

    For what real number k does the product (25 + ki)*(3+2i) equal a real number?

    asked by XXX
  9. Chemistry

    What is the pH change of a 0.220M solution of citric acid (pKa=4.77) if citrate is added to a concentration of 0.155M with no change in volume?

    asked by Samantha
  10. Chemistry

    Item 1 Maleic acid is a carbon-hydrogen-oxygen compound used in dyeing and finishing fabrics and as a preservative of oils and fats. •In a combustion analysis, a 1.054-g sample of maleic acid yields 1.599 g of CO2 and 0.327 g of H2O. •When 0.609 g of

    asked by Samantha
  11. analytical chemistry

    a 0.4617g sample containing sodium bicarbonate was dissolved and titrated with standard 0.106M of hydrochloric acid solution , requiring 40.72ml. the reaction is: HCO3- + H+ -> H2O + CO2 Calculate the percent sodium bicarbonate in the sample. (Given

    asked by zzz
  12. math

    Bob does 2/7 of a book in 1 hour.how long will he take to do the remaining work?

    asked by Ahmed
  13. Chemistry

    Calculate the mass percent of a NaCl solution in which 158g of NaCl is dissolved in 3.81L of water at 25 ∘C (density = 0.997 g/mL).

    asked by Alicia Estrada
  14. chemistry

    The concentration of Mg2+ ion in a solution is 0.010M. At what pH will Mg(OH)2 first precipitate? (Given Ksp Mg(OH)2 equals 1.2*10-11)

    asked by Lisa
  15. trig

    Help with simplest form sin(2pift - pi) + sin(2pift + pi)

    asked by sheree
  16. Chemistry

    Predict the products of the electrolysis of a solution of aqueous MnSO4 given the following choices: a. H2SO3 (aq) b. O2 (g) c. H2 (g) d. OH- (aq) e. Mn (s) f. e- g. H+ (aq) how is the answer O2 and H2SO3?

    asked by Sara
  17. chemistry

    A lactic acid/lactate ion buffer solution contains 0.43M HC3H5O3 and 0.90M C3H5O3-. The value of lactic acid is 1.4*10-4 calculate the pH of this buffer

    asked by jennifer
  18. chemistry

    What volume of 0.076M HNO3 is required to titrate 20.0ML of 0.25M Ba(OH)2 solution? use 2 sig figures

    asked by jennifer
  19. physical science

    An input force of 20 newtons is applied to a lever at a distance of 2 meters from the fulcrum. An object 0.5 m away from the fulcrum (and on the other side) is lifted by the 20-N force. What is the output force? A. 10 N B. 20 N C. 40 N D. 80 N

    asked by tetianna
  20. Math

    there is a swimming pool, 3 meters in width and 4 meters in length. the owner wants to built a uniform deck around the swimming pool which is 3 times of the area of the pool. what's the width of the deck?

    asked by Eric
  21. trig

    A radio transmission tower is 471.0 feet tall. A guy wire is to be attached 6 feet from the top and is to make an angle of 23.1 degrees with the ground? How many feet long should the guy wire be? I am confused on how to find the equation for this problem

    asked by Coaco
  22. mathematics

    Oaktree Transportation Corporation has 75,000 shares of stock outstanding. What would the dividend per share of stock be from a dividend declaration of $102,750? How many shares of stock does Jody Nichols hold if her share of the dividend is $20.55?

    asked by Anonymous
  23. pre-calculus 11

    The infinite series 1+3x +9x^2 +27x^3+.. has a sum of 4.The value of x is? so if 1/1-r I substitute 1/1-3x =4 so x=1/4 if someone could confirm that my answer is correct? thanks so much

    asked by george
  24. Algebra

    What constant must we place in the blank below in order to be able to factor the resulting expression into the product of two linear factors: 2mn - 16m - 7n + ____

    asked by XXX
  25. Chemistry

    I have know clue how to answer this, but I tried something.(predicting products of electrolysis in aqueous solution)/ Predict the products of the electrolysis of a solution of aqueous MnSO4. I first wrote this: Mn^2+ SO4^2- Then for Mn^2+, it can be

    asked by Sara
  26. Chemistry

    Use each equation to predict whether the relative entropy change is S(products) > S(reactants) or S(products) < S(reactants) and whether ΔS > 0 or ΔS < 0 for the chemical reaction represented. Justify your answer in each case. a.

    asked by Madison
  27. Physics

    Three blocks of mass 10kg, 20kg, 15kg respectively are being pushed in a row on along a horizontal surface with constant velocity by a force applied to the 10kg block.The coefficient of kinetic friction between each of the blocks and the surface is 0.18.

    asked by Alex
  28. physics

    A small bead of mass 100 g is able to slide along a frictionless wire. The wire is bent into a semicircle of radius 10 cm and rotates about a vertical axis with angular velocity 12.5 rad/s. (i) Draw a free body diagram depicting the forces acting on the

    asked by Khali Barkho
  29. ELA

    t the library, the quickest way to locate varied, reliable information for your research paper is to      A. check the encyclopedias. B. search the card catalog for related titles. C. ask the reference librarian. D. check the Readers' Guide.

    asked by Brooklyn
  30. chemistr

    What mass of HNO3 is needed to prepare 400mL of 0.25N solution?

    asked by jennifer
  31. Chemistry.

    Predict these reaction products. If a reaction takes place, balance the reaction if needed. If no reaction takes place then write no reaction. Cu+FeCl3--->CuCl3 + Fe Double replacement Al+HBr----> AgNO3 + KCL--->AgClKnO3 Double replacement

    asked by Jessy
  32. Economics

    In a command economy, who issues "commands" regarding the three basic economic choices? Question 1 options: Business leaders Government Consumers All of the above

    asked by Anonymous
  33. sgmic

    Prove that tan theta+tan 2theta+tan 3theta=tan theta*tan 2theta*tan 3theta

    asked by radhika pandey
  34. Carmel

    A memory card is one quarter full when 375 more pictures are taken it'll be two thirds full how many pictures can the memory card hold and how many pictures are on it?

    asked by Jon
  35. math

    what is the volume of the cylinder to the nearest whole number? use 3.14 for pi r=4 h=10 my answer is 502.65 and rounding it is 503

    asked by siulanis perez
  36. MATH

    A 95% confidence interval for the mean of a normal population is found to be 17.6

    asked by MARY
  37. pre-calculus 11

    The question is the roundtrip flight from Edmonton to Toronto covers a distance of 5400km in 7.6 hours. The speed from Edmonton to Toronto was 95 km/h faster than the speed from Toronto to Edmonton. What was the speed of the plane from Toronto to Edmonton?

    asked by george
  38. Chemistry

    Consider the NiCd (nickle cadmium) cell found in rechargeable batteries. 1.)Which element is the cathode when the cell is recharging (being electrolytic)? 2.)How many cells must be present to produce 1.2 V 3.)Which element is the anode when the cell is

    asked by Sara
  39. science

    Time of evaporation of 250ml of water at room temperature

    asked by sjdooa
  40. college chemistry

    Calculate the molarity (M) of 156.2g of H2SO4 in 1.275L of solution.

    asked by Alicia Estrada
  41. Math

    At a community picnic, the following liquids were combined to make a punch: 3 gallons of water 1.5 gallons of cranberry juice 1 pint of strawberry juice 1 cup of grape juice 3 quarts of pomegranate juice How much punch was made in all for the community

    asked by Anonymous
  42. Physics

    A projectile of mass 0.636 kg is shot from a cannon, at height 6.6 m, as shown in the figure, with an initial velocity vi having a horizontal component of 6.8 m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and

    asked by alex
  43. New lekhnath public academy.N.L.P.A

    THE means of transportation that are inside the water and water surface both is called submerging.

    asked by Rajesh Dahal
  44. Mantaqui

    The amount of carbon which when completely burnt in air,produces 100gram of carbon dioxide by weight is

    asked by Xaim
  45. Earth Science

    What is the atmosphere's role in the exchange of gases on Earth?

    asked by Victoria
  46. Electrolysis

    A current of 1.2A was passed through an electrolytic cell containing dilute Tetraoxosulphate(VI) for 40minutes. Calculate the volume of gas produced at s.t.p.

    asked by Micheal
  47. physics

    identify tie force fields from the following : density field, temperatuse field, gravitational field, magnetic field, electrostatic field, electric field

    asked by Anonymous
  48. algebra

    find the quotient of 2x+1/4x^2+8x+5

    asked by memo
  49. Spanish

    I was hoping you could proofread this for me please? No tenía ningún problema en el mundo cuando era más joven. Viajaba por lo menos una vez al mes. Volaba de Nuevo México Y Arizona mucho. Soy originalmente de Arizona, pero la vivía mayoría de mi

    asked by Anonymous
  50. ELA

      You are least likely to feel that an Internet source is reliable if the information is posted       A. on the U.S. Department of Labor Web site. B. on the Web site of your local police department. C. from a university department. D. without a

    asked by Brooklyn
  51. Geometry

    Solve for z. I got z=72 degrees and i don't know how I got it. The circle has diameter AB then another diameter CD. Arc AD = 40 degrees then angle DEB = 124 degrees and z = BC. The diameter DC intersects diameter AB. Please help i can't figure it out and

    asked by Lexy
  52. english

    In each sentence, there is one word which is incorrect. Choose the one word or phrase that is in? 1. What is the name of the taller mountain in the world? a. Is b. Name c. Taller d. In 2. Every morning, Kristen wake up at 7.00am on the dot a. Every b. Wake

    asked by indra
  53. writing sentences and paragraph

    Respected Sir/Madam, Myself Yogita Chadha Medical Healthcare Professional. I have Diploma in pharmacy and professional certificate in medical health care services. I have a handsome experience to serve in health care industry. I work almost one and half

    asked by yogita
  54. algebra

    three times a number decreased by 7 is equal to the number increased by 39. what is the number?

    asked by chenny
  55. English

    May I take your order? - Yes, please. I'll have a ham sandwich and an orange juice. - Is that all? - Yes. How much is it all together? =============================== Q1: In the short dialogue, will you look at the last sentence? What about the following

    asked by rfvv
  56. physics

    A person goes to market,makes purchases and comes back at a constant slower speed.Draw displacement-time and velocity time graphs of the person

    asked by nikitha
  57. MATH

    A theater puts on a play and it's overhead is $750. It will charge adult's $5 per ticket and students $3 per ticket. The theater holds 200 people. What is the maximum profit? (How many adult tickets will be sold and how many student tickets will be sold?)

    asked by Anonymous
  58. Maths

    A cylindrical tank has the dimensions a 100cm and 140cm ,if the tank is filled with 275 liters of water what is the depth of water in the tank

    asked by Andre
  59. math

    solve each of the following initial value problems and plot the solutions for serveral variables of ynaught a)dy/dt = -y+5 I got to the point where I have: y= ce^-t + 5 they give y(0)=y(naught) so I tried plugging in 0,0 and got c to be -5. but the answer

    asked by sara
  60. analytical chemistry

    a buffer solution is 0.2M in acetic acid and in sodium acetate. Calculate the change in pH upon adding 1.0ml of 0.1M hydrochloric acid to 10ml of this solution.(Given pKA of acetic acid is 4.76)

    asked by woo
  61. chemistry

    The molar volume of an ideal gas is

    asked by Xaim
  62. Goverment

    the president can choose to rid of democracy a. true b. false

    asked by Cat
  63. pre-calculus 11

    I have a question that two ski decide to have a race. I need show a graph of height versus time of the two skiers going over a jump. I am assuming that both skiers graphs would be parabola's and have a maximum height with both graphs opening downward.

    asked by george
  64. Maths

    2,x,y are the first three terms of an arithmetic sequence.If the 2nd term is decreased by 1.The three terms will form a geometric sequence.calculate x and y and my working out is that if i said x-1

    asked by Luhle qwabe
  65. chemistry

    Ksp fo CaSO4 is 6.1*10?-5. how many grams of CaCl2 must be added to 500ml of 0.010M H2SO4 to just start preciptation of CaSO4? I cant figure this out at all.

    asked by Samantha
  66. further mathematic

    find the gradent of the lime parallel to the line whose gradent is -3

    asked by Alade samuel
  67. geography

    what is the capital of fiji

    asked by ricky
  68. English

    I'll have one hamburger. 1. Anything else? 2. Will you have anything else? 3. Do you want anything else? 4. Do you want to have anything else? -------------------- Can we use the others instead of #1?

    asked by rfvv
  69. English

    1. I will transfer you to my manager. ================== In which situation, can we use this expression? What other expressions are similar to 'transfer' here?

    asked by rfvv
  70. Government

    Which of the following is NOT considered an economic goal?

    asked by Anonymous
  71. Stats

    A researcher uses a matched- subjects design to investigate whether single people who own pets are generally happier than single people without pets. A mood inventory questionnaire is administered to a group of 20 to 29 year old non pet owners and a

    asked by Evelyn
  72. algebra

    Solve 2 x^2 + 3 x - 6 = 0. The solutions are x_1 = and x_2 =

    asked by kim
  73. pre-calculus 11

    a launch window of 8:00 to 12:00. If t represents the launch time then what is an acceptable range of values for launch times? My thoughts are on this is that the scientist have a window of 4 hours which can include 8:00 and 12:00 but cannot exceed them.

    asked by george
  74. Science

    What is the mass if a bag if its weight is 9.5N? What is its weight when it is brought to the moon?

    asked by Jeric
  75. Jc motumi

    What is the south African government providing and to whom?

    asked by Lebohang
  76. pre-calculus 11

    -x/(x-3) + 2x/(x+2) (x-1) x (x-2) (x+2)/(x-3)(x-3) my question is should i multiply first and then do the adding or subtracting through a LCD or should i do the adding first?

    asked by george
  77. english

    anguage that is important to the story and exact dialogue that is important to the message or tone makes: sharing the book difficult for the teacher. for a poor choice to share with young children. a story better when acted out with puppets instead of

    asked by Anonymous
  78. math

    I need help thank you what is the volume of the prism High= 12 Base=14 side= 9 my answer was 756.

    asked by siulanis perez
  79. math

    find the unknown lenght of a rectagular prism. Lenght=15 volume=180 ft square with= 4 ft my answer is x=120

    asked by siulanis perez
  80. math

    what is the volume of the rectangular prism w=7 l=23 my answer was 644

    asked by siulanis perez
  81. math

    what is the surface area of the triangle prism. b=9 h=12 side=7 side=15 the answer is 413.39

    asked by siulanis perez
  82. math

    what is the volume of the inside cylinder to the nearest whole number. use 3.14 for pi. r=8 h=18 the other top part is 5. my answer was 508.68 and rounding is 509

    asked by siulanis perez
  83. Government

    Iowa has to honor a marriage that was granted in Indiana. True False Im so confuse

    asked by Bob
  84. FRENCH!

    Please help fix my sentences. Please keep in mind my past, present, and future tenses. You've been a great help Sra.Mme. 1.) This week, I went to my cousins house. 2.) We had a community gathering. 3.) I met so many new people. 4.) The gathering is fun.

    asked by Gabs
  85. Life Orintation

    . Research and briefly discuss the following processes that the community must engage whenever there is an issue before and during a protest: how to engage in a protest, protest restrictions,permit to hold a protest,activities during a protest,as well as

    asked by Smangaliso
  86. Algebra

    In interval notation what is |7-8x|

    asked by kim
  87. mechanics

    a 20N sphere A is released from rest when angle at A is 90° and strike a 25 N block B which is at rest.if coefficient of restitution between the sphere and block is 0.75 and that the coefficient of kinetic friction between block and floor is 0.25. How far

    asked by pankaj sharma
  88. chemistry

    The ksp for Al(OH)3 is 3.7*-5 at 20 degrees. What is the solubility of Al(OH)3 in grams per litre?

    asked by Lisa
  89. chemistry

    The mechanism of solubility depends on the solute and solvent. Describe on an ionic or molecular scale how each of the following dissolve: a.NaCl in H2O b.I2 in CCl4 c.CH3CH2OH in H2O

    asked by Lisa
  90. Algebra

    In interval notation what is 20-|7x+1|>=6

    asked by kim
  91. French!

    I fixed this one from the previous previous one. Please check. Merci. éüûà 1.) Cette semaine, je suis allée à la maison. 2.) Je me suis détendu parce que je jeûnais. 3.) Ma famille et moi avons rompu notre jeûne au coucher du soleil. 4.)

    asked by Gabs
  92. chemistry

    How many equivalents of an acid or base are in the following? 0.43mol Mg(OH)2 and 2.8g Mg(OH)2?

    asked by jennifer
  93. algebra

    The diameter of the base of a cone is 5 ft, and the slant height is 7 ft

    asked by lisa
  94. furthe math

    find the gradent of the lind parallel to the line whose gradent is -3

    asked by Anonymous
  95. physics

    the lines of force of a magnetic field do not cross. why is this so

    asked by alade olushola
  96. ENVM

    Review the three most significant adverse environmental impacts you identified in Week Four for the facility you are working with in your Capstone project and suggest actions that the facility might take to eliminate or mitigate them. Restrict your answer

    asked by Anonymous
  97. secondary

    find gradient of y plus 2x divide by 4 equal x divide by 3

    asked by stanil maya
  98. Science Help. Thank You! (:

    how does petroleum affect the environment? please no links thank you! (:

    asked by ilovelasagna
  99. Science

    What is the atmosphere's role in the exchange of gases on Earth?

    asked by Victoria
  100. Algebra 2

    Can someone please tell me how to solve and graph this system of trinomial quadratic inequalities? {y is greater than or equal to x^2+6x+12} {y

    asked by Margaret
  101. FRENCH!

    Please check these sentences for a story. Thankyou again Mme. 1.) This week, I went home. 2.) I relaxed because I was fasting. 3.) My family and I broke our fast at sunset. 4.) Today, I am fasting. 5.) Tomorrow, I will go to the mosque and pray.

    asked by Gabs
  102. FRENCH1

    é ü û à Please correct. I did my best to correct each sentence. 1.) Cette semaine nous allon à Seattle. 2.) Nous visité notre famille. 3.) Nous avons dépensé beaucoup de temps avec ils à une mariage et pendant camp. 4.) Aujourd'hui, je suis aller

    asked by Gabs
  103. Algebra 2

    Can someone please tell me how to solve and graph this system of trinomial quadratic inequalities? {y is greater than or equal to x^2+6x+12} {y

    asked by Margaret
  104. science

    An astronaut has a mass of100kg. She recedes from her spacecraft using spurts of gas from a small unit on her back. If the force generated by the gas spurt is 50N, calculate her acceleration.

    asked by april
  105. cubic function

    Just need help on the first 3 steps. I have tried to factoring it, its like there are no factors. x^3-3x^2-11x+1=0

    asked by Gibbons
  106. Mathematics

    What are adjusted residuals?

    asked by Britani
  107. Math

    Think of a five-digit number composed of odd numbers. The thousands digit is two less than the ten thousands digit but two more than the hundreds digit. The tens digit is two more than ones digit which is four less than the hundreds digit?

    asked by Maitess
  108. Math

    The question is: A gardener wishes to create a rectangular bed. There are 70 meters of fencing wire which will be used to fence three sides of the garden bed, with a brick wall forming the fourth side. Calculate the maximum area of the garden bed that can

    asked by Side length of a question help
  109. math

    There is 70m of fencing wire which is used to create 3 sides, brick wall is used for the 4th side. Calculate the maximum area of the rectangle, and state it's dimensions. (I got the correct maximum area but can't figure out how to get the side lengths.) I

    asked by Side length of a question help
  110. Economics

    What are the costs and consequences of providing welfare

    asked by Lusanda
  111. math

    the billions period has three different even digits whose sum is 12. each of the other places is occupied by 8. what is the number?

    asked by Anonymous
  112. socialology

    Describe a situation in which you might see a gesselschaft community partnered with mechanical solidarity.

    asked by PETER
  113. english

    hello admin,i have an english homework and i confuse with this question 1 robin still felt --------- of the accident several months later. a reaction b effects c affects d contraction and i answer a,is it wrong? 2 despite the peer pressure, jessica held

    asked by grace