Questions Asked on
September 29, 2015

  1. Science please check my answer

    Which of the following fossil types is best described as forming when minerals replace all or part of an organism's body? A) A mold B) A petrified fossil*** C) A cast D) A trace fossil

    asked by Grace
  2. Technolgy

    Which boolean operator omits information for search parameters? AND OR WITHOUT NOT***

    asked by Shalee ^~^
  3. chemistry

    Hydrogen iodide decomposes according to the reaction 2HI(g)H2(g) + I2(g) A sealed 1.50 L container initially holds .00623 moles of H2, .00414 moles of I2, and .0244 moles of HI at 703K. When equilibrium constant is reached, the concentration of H2(g) is

    asked by jude
  4. algebra

    The weight of a rock sample is measured to be 2.5 pounds. What is the percent of error in the measurement?

    asked by G
  5. Chemistry

    Hello! I really need help with this. Name the following salts according to the old -ic, -ous system and the stock system. a. CrS b. Cr2O3 c. CrI3 X 6H20 d. CuCl e. CuI2 f. CuBr2 x 4H20 g. HgCl2 h. Hg2Cl2 i. Fe (OH)3 I am totally lost. I don't know how to

    asked by Rebecca
  6. Calculus

    The equation of motion of a particle is s = t3 − 12t, where s is in meters and t is in seconds. For the velocity function, I got v(t)=3t^2-12 and for acceleration, a(t)=6t. The final question is: Find the acceleration when the velocity is 0. How do I do

    asked by Kelly
  7. Technolgy

    A _________ is a way for students to keep track of information during research Credible Website Search log** Boolean operator online database

    asked by Shalee ^~^
  8. History

    Based on the changes in New Mexico's population after World War II, which conclusion is best supported? A)Economic changes made New Mexico a difficult place to make a living. B)New Mexico's climate was believed to be dangerous and unhealthy. C)People were

    asked by Appreciated Help
  9. chem

    If 20g of CaCo3is treated with 20gm of HCl how many grams of CO2 can be generated CaCO3+2HCl gives CaCl+H2O+CO2

    asked by sharon
  10. calc 2

    A loaf of bread is removed from an oven at 350 degrees F and cooled in a room whose temperature is 70 degrees F. If the bread cools to 210 degrees F in 20 minutes, how much longer will it take the bread to cool to 155 degrees F. Round to the nearest

    asked by james
  11. Chemistry

    Calculate the energy in joules of microwave radiation of wavelength 12.7 centimeters. (E = hν, h = 6.63 × 10-34 J.sec; speed of light = wavelength × ν, speed of light = 3.0 × 108 meters/sec.)

    asked by Destany
  12. chemsitry

    1)Balance the following gas-phase reaction and 2) write its reaction quotient, Qc: CH4(g)+F2(g)......>>.....

    asked by patrick
  13. statistics

    if you know the names of the starting batters for a baseball team, what is the probability of randomly selecting a batting order that is used in the beginning of the game

    asked by recie yanders
  14. Math/Algebra

    A painter earns $15 per hour. what is the minimum number of hours he must work to earn at least $200 write an inequality to represent this situation and solve show your work Im not sure =-=

    asked by Dawson
  15. math

    Jim's backyard is a rectangle that is 15 5/6 yards long and 10 2/5 yards wide. jim buys sod in pieces that are 1 1/3 yards wide. How many pieces of sod will Jim need to buy to cover his backyard with sod?

    asked by Anonymous
  16. Science

    What has the study of fossils allowed scientists to do? A) Describe the past environments and the history of life. B) Study present ocean temperatures at different depths C) Analyze the chemical compositions of sedimentary rocks and minerals. *** D)

    asked by Grace
  17. Language Arts

    What does the aunt in The Story Teller find improper about the bachelor's story? A. It makes fun of Bertha's goodness B. It has too many fantasy elements C. It unrealistically suggests that virtue is always rewarded D. The bachelor tells it without

    asked by Grace
  18. U.S. History

    1. Why did the call for military volunteers lead more states to secede? A: Lincoln's call for military volunteers created a crisis in the Upper South. Many people in those state did not want to secede, but they were not willing to take up arms against

    asked by Victoria
  19. Calculus 1

    The curve with the equation y^2=5x^4-x^2 is called a kampyle of Eudoxus. Find an equation of the tangent line to this curve at the point (-1,2).

    asked by TayB
  20. Chemistry

    For the following reaction, 9.91 grams of sulfur are allowed to react with 20.8 grams of carbon monoxide . sulfur(s) + carbon monoxide(g) sulfur dioxide(g) + carbon(s) is the maximum amount of sulfur dioxide that can be formed? What is the FORMULA for the

    asked by Julian
  21. Physics Projectile Motion

    A ball is kicked with an initial velocity of 21 m/s in the horizontal direction and 16 m/s in the vertical direction. (Assume the ball is kicked from the ground.) (a) At what speed does the ball hit the ground? (b) For how long does the ball remain in the

    asked by Abby
  22. French

    what word is E L A É S L unscrambled.

    asked by Alli
  23. Chem

    Name the following binary compounds consisting of two nonmetals or a metalloid and a nonmetal. 1. AsH3= arsine 2. AsF5= arsenic pentafluoride 3. HCL= Hydrogen chloride is this right?

    asked by Rebecca
  24. fluid mechanics

    a block has a mass of 400kg in air when submerged in seawater it weighs 2943N. what is the specific gravity of the block?

    asked by anthony
  25. Chemistry

    When 0.100 g of calcium oxide is added to 125 g of water at 23.6°C in a coffee cup calorimeter, this reaction occurs: CaO (s) + H2O(l) -> Ca(OH)2 (aq) ∆H = -81.9kJ/mol If the specific heat capacity of water is 4.184 J g-1 °C-1, what is the final

    asked by John
  26. General Chemistry

    An experiment calls for you to use 100 mL of 0.65 M HNO3 solution. All you have available is a bottle of 2.7 M HNO3. How many milliliters of the 2.7 M HNO3 solution do you need to prepare the desired solution?

    asked by Anonymous
  27. english

    which sentence is the best revision? a. My niece is a ballet dancer. b. My niece is a ballet dancer who performs both solo ballets and as a member of the ballet corps. c. My niece is a ballet dancer and I always enjoy attending performances.

    asked by Anonymous
  28. Algebra

    The path of a diver is given by y=-4/9 x^2 + 24/9x +12 where y is the height (in feet) and x is the horizontal distance from the end of the diving board (in feet). What is the maximum height of the diver?

    asked by Josh
  29. Physics Projectile Motion

    An archer shoots an arrow at a 72.0 m distant target, the bull's-eye of which is at same height as the release height of the arrow. (a) At what angle must the arrow be released to hit the bull's-eye if its initial speed is 36.0 m/s? (Although neglected

    asked by Abby
  30. Chemistry

    three liquids have densities of 1.15g/m, 0.79g/ml, and 0.95 g/ml. When the liquids, which do not mix, are poured into a graduated cylinder, the liquid at the top is the one with a density, in g/ml, of ?

    asked by Lara
  31. Chemistry

    Suppose density of 100.0 mL of some liquid was found to be 0.789 g/mL. What would be the specific gravity of 20.0 mL of this liquid?

    asked by Annie
  32. ap chemistry

    home / study / questions and answers / science / chemistry / balance the following example of a heterogeneous ... Your question has been answered! Rate it below. Let us know if you got a helpful answer. . Question Balance the following example of a

    asked by martika
  33. Chemistry

    hydrocarbon mixture 60% c3h8, 40% CxHy 10 g of mixture was burned with O2 excess to give 29.02 g co2 and 8.8 g h2o. what is CxHy?

    asked by Izzy
  34. GRE prep

    A sphere with diameter 1 unit is enclosed in a cube of side 1 unit each. Find the unoccupied volume remaining inside the cube.

    asked by Linda
  35. CHEMISTRY

    IS THIS RIGHT? Name the following binary acids: HF(aq) – Hydrofluoric Acid HCl (aq)– Hydrochloric Acaid H2Se(aq) – Hydroselenide Acid HBr(aq) – Hydrobromic Acid HI (aq)– Hydroiodic Acid H2Te (aq)- hydrotelluric acid

    asked by rebecca
  36. Science

    Hydrogen gas(H2) and chlorine gas (CL2) react to form hydrocloric acid (HCL). What is the correct balanced chemical equation for this reaction? A-2H2+2CL2->HCL B-H2+CL2->2HCL C-2H2+CL2->2HCL D-H2+CL2->HCL I think C Pls Help me

    asked by Jake
  37. science

    a satellite in force free space sweeps stationary interplanetary dust at a rate of dM/dt=alpha v, where M is mass and v is speed of satellite and alpha is a constant. the tangential acceleration of satellite

    asked by 119
  38. physics

    An object is thrown vertically up and attains an upward velocity of 10 m/s when it reaches one fourth of its maximum height above its launch point. What was the initial speed of the object? The acceleration of gravity is 9.8 m/s2. Answer in units of m/s

    asked by Curt
  39. History

    What was the main goal of the American Indian Movement? A)to achieve the right to form reservations B)to win greater rights for all Native Americans C)to establish a U.S. Bureau of Indian Affairs D)to overthrow the tribal government My choice B

    asked by Appreciated Help
  40. College algebra

    A seamstress is designing a triangular flag so that the length of the base of the triangle, in inches, is 7 less than twice the height h. Express the area of the flag as a function of the height. I have figured out the area, but i'm not sure what the

    asked by Amber
  41. Physics

    Select the motion diagram that corresponds to each of the four situations. E.g., if diag. A corresponds to the first situation, diag. C to the second, and none of the diagrams to situations 3 and 4, enter ACNN. Note that the velocity and acceleration

    asked by Mike
  42. chem

    Calculate the number of kJ released for the reaction shown below, if you begin with 52 grams of fluorine (F2), and the ΔH = -542 kJ. H2(g) + F2(g) → 2 HF(g)

    asked by lala
  43. Chemistry

    I cannot understand how the mass of the system has changed. There's no need for you to do my work please just explain it to me! :) thanks so much A scientist placed copper powder into a crucible and heated it until all of the copper reacted. The resulting

    asked by nicole
  44. Math

    simplify (y^4)(y^3) y^1 y^7 y^12 Y^43

    asked by Adri
  45. educational tecnology

    In your presentation you added a text box to ______. a.) cite a source b.) insert a footer c.) insert a header d.) insert a footnote Is it c?

    asked by Halie
  46. math

    bryan is setting chairs in rows for a graduation ceremony. He has 50 black chairs and 60 white chairs. Each row will have the same number of chairs, and each row will have the same color chair. What is the greatest number of chairs that he can fit in each

    asked by yesmique
  47. social stuides

    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 kayla
  48. chemistry

    Write potassium sulphate +barium nitrate ¨ potassium nitrate + barium sulphate as a balanced symbol equation

    asked by natalie
  49. Physics

    A car travels due east with a speed of 40.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 54.0° with the vertical. Find the velocity of the rain

    asked by Aly
  50. chemsitry

    home / study / questions and answers / science / chemistry / make sure to answer both parts: 1)balance the following ... Your question has been posted. We'll notify you when a Chegg Expert has answered. Post another question. . Question Edit question make

    asked by marcus
  51. Life Orientation

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

    asked by mpho
  52. physics

    A rectangular coil of dimensions 20cm by 15cm lies with its plane parallel to a magnetic field of 0.5W/m^2. The coil, carrying a current of 10A experiences a torque of 4.5Nm in the field. How many loops has the coil?

    asked by CALLISTUS
  53. chem

    Calculate the mass of anhydrous sodium carbonate Na2Co3 required to prepare 2.5 litres of 0.50M aqueous solution.(Na=23,C=12,O=16)

    asked by sharon
  54. math

    Express the repeating decimal 0.2323 as a geometric series, and write its sum as the ratio of two integers

    asked by zaib
  55. English

    Identify the preposition. In spite of its popularity, the Pony Express lasted only 18 months. I'm stuck on this one:/ Please help.

    asked by SkatingDJ
  56. english

    the waitress in our local diner are _ to be funny and not always polite if a customer says i'm ready to order now he may get a _ responce such as im ready to retire but you don't hear me making a big deal about it

    asked by tiela
  57. social studies

    which one of the following conclusions is supported by the results of these studies? 1)characteristics other than one's name have no effect on academic achievement. 2)Unusual names do not determine intellectual development. 3)Ethnic group membership is the

    asked by major pain
  58. Science 1 question

    A researcher, studying dolphins in the wild, made the following sketch. Each dot on the map represents one dolphin. The area surveyed by the scientist was 1 km ^2. Based on the researcher's data, how many dolphins would you estimate to be in a 3 km ^2

    asked by Noel
  59. Math

    One table at a bake sale has 75 cookies. Another table has 60 cupcakes. Which table allows for more rectangular arrangements when all the cookies and cupcakes are displayed? Explain

    asked by Anthony
  60. chem

    CaCo3 reacts with aq HCl to give CaCl2+CO2. What mass of CaCo3 is required to react completely with 50cm^3 of 0.60M HCl. Calculate volume of CO2 produced at STP.

    asked by sharon
  61. Fire protection eng

    20,500 gallons of kerosene spill into a banked up area that measure 20 foot x 10 foot how long will the fire last it is left unattended ? 1 gallon = 3.785 liter 1000 liters = 1 m^3 1in = 2.54 cm 1ft = 12 in

    asked by Tom
  62. maths

    find the amount and the compoud interest on r 12800 for 1year at 15/2% per annum, compounded semi- annually.

    asked by compound interest
  63. Math

    there are 16 girls and 20 boys in the school band. what is the ratio of girls to boys? Simplest form

    asked by Taiden
  64. Chem

    Why should a dilute NaOH solution be used for the standardization of NaOH in the analysis of Aspirin using back titration?

    asked by Mark
  65. chemistery

    at 20 degree Celsius, 65.2 g of KBr will dissolve in 100 g of water. what is the mass percent of KBr in water ?

    asked by alex
  66. algebra

    you are building a rock wall for a flower bed along your 38-foot long driveway. You Want the wall to be one-half of the length of the driveway with an absolute deviation of at most 3 feet. write and solve an absolute value inequality that represents the

    asked by draven
  67. Physics

    Vector A and vector B both lie in the same xy plane . Is it possible for them to have same magnitude but different components and same components but different magnitude ?

    asked by Tapendra
  68. geometry

    The endpoints of the diameter of a circle are at (1,2) and (7,-6). What is the circumference of the circle to the nearest tenth of a unit? a. 15.7units b. 31.4 units c. 62.8 units d. 78.5 units

    asked by Paris
  69. Math

    A scuba diver is 31 feet below the surface of water. She dives down an additional 16 feet. How far would she have to rise to reach the surface of water? (Hint) think absolute value because distance can not be negative.

    asked by Amy
  70. Science

    Please help: Observations can lead to hypotheses. Hypotheses can lead to new experimentation. Which best describes an observation and hypothesis that might lead to new experimentation? A. Dr. Sattler discovers a new plant that grows near underwater

    asked by Izabella
  71. life orientation

    Discuss the responsibilities of the road users to ensure safety for one another

    asked by ramadikela anna
  72. math

    Estimate 20.751+2.55+17.4

    asked by Charlize
  73. math

    Can someone show me how to do these problems, please? I really need help... I just have to answer the questions and show how it was solved 1. Carlos spends at least 45 minutes each day on the Internet. Which inequality could be used to describe the amount

    asked by Abby
  74. writing skills

    What else can they do when repairing walls separate from beans or restoring socket carry no electricity what correction should be made to this sentence

    asked by jervel
  75. world geography

    What major cultural feature is common throughout the region? What other cultural features could you use to further divide the Persian Gulf and interior Southwest Asia into more regions?

    asked by sasha
  76. Physics

    A car travels 3.0km due south and then 4.0km due west.what is it displacement from the starting point. R^2=A^2 B^2 am not sure if dat is the formula please help me

    asked by Kazekage carter kumo
  77. mechnics

    the two forces act an angle 120.the bigger the force is 40 and resultant is perpendicular to the smaller one find the smaller force

    asked by athira
  78. CHEMISTRY

    Suppose a sample of hot iron is dropped in a cup of room temperature water. a) what happens to the temperature of the iron & water? b.) in what direction does heat flow occur? c.) when does heat flow stop? d.) assuming no heat is lost to the environment,

    asked by Emma
  79. Life orientation

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

    asked by Ofentse
  80. Maths

    Three runners run a 10 metre race. Each runner runs according to the following rules: Runner 1: s = 2.4 + 0.75t Runner 2: s = 0.2t(t - 5.1) Runner 3: s = 0.2t(t - 5.1)(t - 9.1) Where displacement (s) is in metres and time (t) is in minutes. Calculate for

    asked by Olivia
  81. global history

    which gods and goddesses were especially important to the ancient Egyptians?

    asked by stefanos
  82. College Algebra

    factor completely: 16x^2 + 16x-21 I got not factorable...

    asked by Tim
  83. Chemistry

    30g of TiCl4 is mixed with 18g of water to from TiO2 and HCl. Write the chemical reaction and balance it.How much TiO2 is produced. my answer: TiCl4+2H2O= TiO2+4HCl

    asked by Anonymous
  84. math

    Why could the mean of the data set below be misleading? ages of teachers: 29, 38, 39, 26, 29, 29, 39, 77, 38, 29

    asked by nadwa
  85. Calculus 1

    Use implicit differentiation to find an equation of the tangent line to the curve at the given point. x^2/3 +y^2/3 =4 (-3sqrt(3),1) (astroid)

    asked by TayB
  86. Math

    the sum of the ages of rex, ben and alfred is 36 years, two years ago, ben was 3 times as old as rex was then, 8 years from now, alfred will be twice as old as ben will be then. find their present age.

    asked by Anonymous
  87. Math (Help)!

    I'm lost on where to begin with the problem... Someone help explain how the problem should be done. An indoor physical fitness room consists of a rectangular region with a semicircle on each end. The perimeter of the room is to be a 200-meter single-lane

    asked by Amy
  88. Math

    a shop has one pound bags of peanuts for $2.00 and three-pound bags of peanuts for $5.50 if you buy 5 bags and spend $17, how many of each size bad did you buy?

    asked by Jerry
  89. Chemistry (check)

    Are the following names correct? CN- cyanide ion H2O dihydrogen monoxide ClO2 chlorite ClO4- perchlorate N2O dinitrogen monoxide GeF4 germanium tetrafluoride SO32- sulfite IF3 iodine trifluoride PO33- phosphite NH3 nitrogen dihydrogen ICl3 iodine

    asked by Anonymous
  90. PHYS 101

    A block of mass m = 1.70kg is released from rest h = 0.485m from the surface of a table, at the top of a θ = 27.4° incline as shown in the figure below. I got a few of the questions a)The frictionless incline is fixed on a table of height H = 1.98m.

    asked by Eman
  91. Geography (Ms.Sue ) Help

       The concept of the _______ of distance is illustrated by the fact that as cost increases with distance, interactions between people decrease.  A. friction B. relativity C. flexibility D. erosion I am thinking either A or D. But can't decide.

    asked by Brooklyn
  92. Case Study

    Darlene's parents believe that her extra weight is baby fat and aren't concerned about it. What are some of the physical and social consequences of obesity that darlene may experience? What does these question mean?

    asked by M
  93. Social Studies

    May you please check if my answer is correct? Why did the system of feudalism arise during the Middle Ages? (1 point) to develop an economic system to determine jobs within a city to defend the countries from attacks to organize the household of noblemen A

    asked by Dorathy
  94. Algebra I

    If a set of ordered pairs is a function, are the ordered pairs also a relation? (Also, please explain why)

    asked by K
  95. CHEM

    Using mass percentages:- The American Dental Association recommends that you should consume 3.0 mg of fluoride a day. If you get your fluoride in the form of sodium fluoride, what mass of sodium fluoride should you ingest?

    asked by Mahnad
  96. Spanish

    I don't want the answer just check because I'm unsure 1) Definite article for the following noun? maestra el

    asked by Hailey
  97. Southridge

    What's the process if the input numbers are 1,2,3,4,5 and the output numbers are 2,5,10,17,26

    asked by Brian
  98. Physics

    In getting ready to slam-dunk the ball, a basketball player starts from rest and sprints to a speed of 6.20 m/s in 3.56 s. Assuming that the player accelerates uniformly, determine the distance he runs.

    asked by Natasha
  99. Physics

    Select the motion diagram that corresponds to each of the four situations. E.g., if diag. A corresponds to the first situation, diag. C to the second, and none of the diagrams to situations 3 and 4, enter ACNN. Note that the velocity and acceleration

    asked by Michael
  100. Math

    At a certain marathon race, the winner comes in at a time of 130 minutes. Second place comes in at a time of 135 minutes, and third place comes in at 140 minutes. Starting with third place, contestants come in at regular intervals all the way up to the

    asked by Kim
  101. Grade 12 math

    At a certain marathon race, the winner comes in at a time of 130 minutes. Second place comes in at a time of 135 minutes, and third place comes in at 140 minutes. Starting with third place, contestants come in at regular intervals all the way up to the

    asked by no name
  102. Geometry

    Find the ratio of the interior angles of a triangle if their respective exterior angles are in the ratio of 5:6:7.

    asked by -N
  103. Math

    Julio is making a bookcase with 5 shelves. Each shelf is to be 3/4 yard long. How much wood does Julio need for the shelves?

    asked by Kim
  104. College Algebra

    simplify expression (no negative exponents) -2^-3(xy^3)^-2/x^-1y^-3 I got 1/-8x^2y^2

    asked by Tim
  105. Grade 12 Math

    At a certain marathon race, the winner comes in at a time of 130 minutes. Second place comes in at a time of 135 minutes, and third place comes in at 140 minutes. Starting with third place, contestants come in at regular intervals all the way up to the

    asked by Kim
  106. Mv convent

    The height of a room is 6m.A person of height 1.5m is standing at the centre of a room.A plane mirror is to be fixed on front wall the minimum vertical lenght of the mirror so that the person can see complete image of his own and the wall behind him?

    asked by Shakshi
  107. physics

    water flows in river 0.5km wide with speed 6km/hr. A boat can travel with speed 10km/hr in still water. In what direction should boat sail to reach opposite bank?

    asked by mcqueen
  108. LA

    • How are a dictionary and thesaurus similar? How are they different? Cite evidence from the sample entries on p. 120 to support your answer. • How can use of a dictionary and thesaurus be complementary?

    asked by Adri
  109. Physics

    A parachutist bails out of airplane and suddenly parachute did not open but after falling 80 m he opens his parachute due to which retardation of 4m/s . He reaches on the ground with velocity 4m/s . What was the height of airplane at the time of bail and

    asked by Tapendra
  110. Life orientation

    Illustrate three ways on how this issue can impact negatively to the health of the people in your school/community.

    asked by Cassper gabuza
  111. MCC

    There are two race cars. the sum of their fastest speed is 50o.3 miles per hour. If the If the speed of one of the cars is 2.8 mph faster then the other car, what are the speeds of each car?

    asked by Haywood
  112. Psychology

    Could someone do this for me Imagine an action that you engage in every day and explain how neurons and neurotransmitters might work together to help you engage in the action by defining what the major parts of neuro do. ****Use complete sentences and

    asked by maguette
  113. chemistry

    What is the molecular weight and formula for petroleum ether?

    asked by Lauren
  114. math

    Can someone show me how to answer this question? Please? I would really appreciate any help you can give baseball statistics~~ “According to an Associated Press study, the average MLB salary will break the $4 million mark for the first time in 2015,

    asked by Abby
  115. Math

    Which statement is false? A: Every integer is a real number. B: the number zero is a rational number. C: every irrational number is a real number. D: every real number is a rational number****

    asked by Sara
  116. Physics

    Two soccer players start from rest, 30 m apart. They run directly toward each other, both players accelerating. The first player’s acceleration has a magnitude of 0.49 m/s2. The second player’s acceleration has a magnitude of 0.43 m/s2. (a) How much

    asked by Natasha
  117. math

    After traveling for 6 hours, they are 780 miles apart. If Kyle drives 10 miles per hour faster than Joel, how fast was Joel traveling?

    asked by suze
  118. Math

    Will runs 6 laps before Megan joins him at the track. They then run together at the same pace. Represent the relationship between the number of laps Will runs + Megan runs.

    asked by Student
  119. chemistry

    Suppose that after measuring the pH of 1.05 M HCl solution, three drops (0.20 mL) of the solution remain behind on the pH electrode. a) When this electrode is then dipped into 100 mL of pure distilled water, show by calculation that the pH of the water is

    asked by Nicollette
  120. global history

    a.)what social classes did ancient Egyptians have? b.)what rights did women have?

    asked by stefanos
  121. maths

    Thabo is 5years older than Amy,in 7years time Amy will be 3/4`s of thabo`s age. How old is Amy now?

    asked by charlie
  122. OAKLAND

    Using mass percentages:- The American Dental Association recommends that you should consume 3.0 mg of fluoride a day. If you get your fluoride in the form of sodium fluoride, what mass of sodium fluoride should you ingest?

    asked by Mahnad
  123. Chemistry

    What is the mass in grams of Br in 8.53 moles of FeBr5?

    asked by Racheal
  124. Physics Projectile Motion

    A projectile is launched at ground level with an initial speed of 51.5 m/s at an angle of 35.0° above the horizontal. It strikes a target above the ground 2.50 seconds later. What are the x and y distances from where the projectile was launched to where

    asked by Marcus
  125. Math

    the sum of the ages of rex, ben and alfred is 36 years, two years ago, ben was 3 times as old as rex was then, 8 years from now, alfred will be twice as old as ben will be then. find their present age.

    asked by arianne
  126. kheodi

    Assess the extent to which bad road use has a direct impact on the physical,emotional,social and economic aspects to the family,the community and the country

    asked by masale
  127. Statistics (Central Limit Theorem)

    Does the central limit theorem apply to non-normally distributed variables? Why?

    asked by Zam
  128. Math

    A farmer had 75 apples. Every day, the farmer kept a fraction of the apples. gave the rest away , and then ate one. The fractions he decided to keep are listed below:1/2 1/4 3/4 3/5 5/6 11/15 In which order did he use the fractions so he was left with just

    asked by Amos
  129. Algebra

    A runner starts at the beginning of a cross country course running at a constant rate of 6 miles per hour. Five minutes later a second runner begins at the same point,

    asked by Rbg
  130. language

    is the noun in this sentence correct? the wealthier peoples class was called the gentry

    asked by shawn
  131. 7th grade math help

    What is rational number as a terminating decimal? Also what would this be and how would it be solved 19/20 How would you turn it into a terminating decimal?

    asked by NApolo
  132. Indices

    P=(64)^-2 Q=1/16^(1/3) R=8root2 Express pqr as a power of 4 P=4^(-6) Q=4^(-2/3) R= ???????? How can i find R? *please show me the method for future reference* Thankyou

    asked by Anonymous
  133. Math

    A bag of pears weighs 6.75 pounds. The pears cost $2.39 per pound. What is the total cost of the pears?

    asked by Amy
  134. birla public school

    A mixture of 0.6 mole of al and 0.9 mole of cl2 are allowed to react as 2al+3cl2=2al2o3 . Calculate mass of reactant left unreacted. (al=27gmol-1 , cl=35.5gmol-1 )

    asked by ashika
  135. math

    Subjects and preadicates

    asked by Mia
  136. chemistry

    A mixture of 0.6 mole of al and 0.9 mole of cl2 are allowed to react as 2al+3cl2=2al2o3 . Calculate mass of reactant left unreacted. (al=27gmol-1 , cl=35.5gmol-1 )

    asked by ashika
  137. health

    What three processes does food undergo in the digestive system

    asked by christian
  138. social study

    why is it hard to get a answer on your web site

    asked by sarha
  139. English

    1. Paul and (I, me) read about how he became crippled with polio. 2. (She, Her) and many others fought for equal rights for minorities. 3. Her aides and (she, her) traveled all over the world. 4. One of Eleanor Roosevelt's greatest admirers today is (I,

    asked by Hayden
  140. Math

    f(x) = log2(x – 3) + 1. How do I find the Domain and Range?

    asked by Sara
  141. Chemistry

    You are given 7.80g of Bromine gas in a container. Under identical conditions, you have 12.8g of an unknown gas. What is the molar mass of the unknown gas? - so, considering the molar mass of Bromine that I used was 159.808g/Mol, I did: 7.80g Br /

    asked by Hero
  142. Algebra II

    Hey all. I'm trying to solve this question, but don't really understand how to do it: If (x^4)^5 = x^a for all values of 'x', what is the value of 'a'? Any help is much appreciated, thanks!

    asked by Anonymous
  143. Physics

    A red colored ball tossed upward reaches a maximum height of 3.0m. show that the initial speed is 7.7m/s^2.

    asked by Erin
  144. math

    Elizabeth is an event planner who has been hired to plan a class reunion. The class has 275 people and 256 people will be attending. Elizabeth must plan the seating decorations and food. The school colors are blue and white. Elizabeth has 84 blue balloons

    asked by Ilona
  145. science

    What is the rarest element?

    asked by Matthew
  146. math

    An aquarium holds 6 1/4 gallons of water. The water level has dropped to 4/5 of this amount. How much water should be added to fill the aquarium?

    asked by troy
  147. atomic energy test question

    38. A body having a mass 0.1 kg was weighed suspended in water and its mass was noted to be 88.5 gram. What will be the volume of the body? [Assume density of water to be 1.00 g/ cm3]

    asked by zain
  148. Calculus

    Find the antiderivatives. 1. f(x)= x sin (x^2) 2. f(x)= x sin x

    asked by Anonymous
  149. College Algebra

    Use quadratic formula to solve: 5x^2-10x+6=0

    asked by Tim
  150. thermo

    an open container with 10L of water at 1 bar and 20 C is used for cooling electronic parts.Each electronic part has a mass of 01.kg and an average specific heat of 0.14 kJ/kg-K. The electronic parts are initially at 300 degrees Celcius and are required to

    asked by brad
  151. science

    what is the half-life of the nuclide

    asked by john
  152. math

    how do i change a fraction to a mixed number

    asked by nathan
  153. Math

    How to simplify the expression using De Moivre's theorem? The question is cos 2x + i sin 2x / cos 3x + i sin 3x.

    asked by Megan Choong
  154. Lititure

    How do u write a melcon and rikki-tikki-tavi as a bully

    asked by Bobby
  155. Calculus 1

    Use implicit differentiation to find an equation of the tangent line to the curve at the given point. x^2+2xy-y^2+x=6 , (2,4) (hyperbola)

    asked by TayB
  156. Crump Elmentary

    When you put together unequal groups, you can only add."is he correct?explain

    asked by Tamara
  157. Math

    For nth root functions, I know that if "n" is even, then the domain must be equal or greater than zero. If "n" is odd, then domain will be all set of real numbers. But how do I determine the range of an n-th root function?

    asked by ela
  158. Geometry

    This is the question - Two angles with measures 5x - 5 and 11x - 7 are supplementary. Find the Value of x and the measure of each angle. Thank you so much for your help.

    asked by Josselyne
  159. math

    how many posts are needed to build a fence if the area is 32 and perimeter is 24 and the dimensions are 8x4

    asked by cherrie
  160. what is the defination and example of ethics and m

    what comes to mind when you think of ethic or morality what is a example of a ethical belief and explain the the reason.

    asked by Anonymous
  161. history

    what were the two major religions represented in north america this time.?how did these relogions influence the war

    asked by nanii
  162. Sphere help

    If the daimeter of a sphere is increased the volume will be increased by x% find x?

    asked by Collins
  163. Social studies

    Importance of social studies

    asked by Kazekage carter kumo
  164. vector

    evaluate integration of sinti+costj from 0 to pi/2

    asked by rekl
  165. Simultaneous equation xo difficult

    X+y+z=2 x^2+y^2+z^2=3 x^3+y^3+z^3=5 find x,y,z.....?? honestly i having being battle with that question for ova a month i need help and a cerious explanation

    asked by Collins
  166. English

    1. He continued (they, them) and similar interests all his life. 2. What amazing people were (they, them)! 1. them 2. them

    asked by Hayden
  167. Physics

    I have a question about a vector addition problem using the polygon method. Vector 1 has a magnitude of .1 and theta of 30 degrees. Vector 2 has a magnitude of .2 and a theta of 90 degrees. Vector 3 has a magnitude of .3 and a theta of 225 degrees. I'm

    asked by Claire
  168. English

    1. Mr. Perez said we had to find a way to cover both topics. 1. Is we a subject pronoun in this sentence? Yes

    asked by Hayden
  169. health

    Endocrine glands ________. A. Do not have ducts to carry their product to a surface B. Do not have ducts to retain their product below surface C. Have ducts that carry their secretory product to a surface D. Have ducts to retain their secretory product

    asked by christian
  170. Math

    What is a counters to show a group that is greater

    asked by Anonymous
  171. English

    1. What's up, Ben? You look upset. - I lost first place. (Is this answer suitable? Do we have some other natural expressions?)

    asked by rfvv
  172. Physics

    A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound of the ball hitting the pins 2.44 s after the ball is released from his hands. What is the speed of the ball? The speed of sound

    asked by Courtney
  173. Physics

    What effect does the normal force have on the coefficients of friction?

    asked by Frank
  174. MATHS

    A wooden crate half full of pineapples has a mass of 14kg. The same crate one third full of pineapples has a mass of 12 kg. What is the mass of the empty crate? Please help, many thanks.

    asked by BRYAN
  175. McDonald 26

    I am greater then 4 tens and less than 5 tens

    asked by kemond
  176. welkin

    a block of mass 50kg just slide distance of one metre if the coefficient of friction between their surface is 0.2,then work done against friction is

    asked by iqbal
  177. MATH

    EXPLAIN HOW THE 6 IS IN THE THOUSANDS PLACE IN THE NUMBER 364,021

    asked by EMMA
  178. Science

    The spin of an object on its own axis is called

    asked by Jonathan
  179. chem

    name the following binary acids. is the name for K2S, potassium sulphide or potassium sulfide? and is the name for K2Te, potassium telluride?

    asked by rebecca
  180. math help

    3x^2-6x-9 State the coordinates of the x-intercepts show work.

    asked by Anonymous
  181. physics

    obtain the resultant and direction of each pair of the forces 1.20N on top of a triangle and, 15N3 under the triangle and 45 as the degree of the triangle. 2.20N on top of right angle triangle and 15N under the right angle triangle.

    asked by godsgift
  182. College Algebra

    1 - 1 = 1 ______________________________________ 4x-12 2x-6 x^2-3x Solve the equation (its subtracting the first two fractions and equalling the last fraction)

    asked by Tim
  183. global history

    what rights did women have in Egypt?

    asked by stefanos
  184. maths

    In 2010 a sample of 50 cars was taken, yielding 8 small cars, 27 medium cars and 15 large cars. A sample of 50 cars taken in 2015 revealed 10 small cars, 25 medium cars and 15 large cars. Calculate the chi-squared test statistic here.

    asked by Khyati
  185. algebra

    find the solutions to the equation; x^(2/5)-8x(1/5)+16=0

    asked by Ryan
  186. Algebra

    the sum of two times a number n and four less than three times the same number.

    asked by Chamar
  187. ict

    peter works as a part-time assistant at a car wash and receives an hourly wage. enter the number of hours he worked for a specific week, as well as the pay rate per hour. he has to pay R5 towards the social club. calculate and display how much take home he

    asked by VE
  188. crump elm

    When you out together uneual groups you can only add. Is he correct? Explain

    asked by Tamara
  189. maths

    I need explanation to this question.solve 48 base12 multiply by 15 base12.i can solve it by first converting to base ten and back to base 12,but i need to be able to solve directly in base12.Thanks

    asked by james
  190. Algebra

    1\8(3d-2)=1/4(d+5)

    asked by Anonymous
  191. global history

    describe 3 achievements of ancient egyptians in the arts or learning

    asked by stefanos
  192. Advanced functions

    if a car is moving at some speed and then goes twice as far, would the braking distance be twice as far? yes or no? explain

    asked by Gabriella
  193. english

    Soap has existed since ancient times long ago? a. consistency b. parallelism c. concise language

    asked by Anonymous
  194. segi college

    Do you think that southwest actions are consistent with its mission?explain ways in which the firms action are consistent or inconsistent with its mission

    asked by alex
  195. St. Louise's Inclusive Secondary School

    How to prepare 0.5m solution of HCL

    asked by Mfonobong gabriel