Newest questions and responses by Paul
  1. chemistry

    How many atom of oxygen are present in 8.8g of carbon(iv)oxide

    asked on March 13, 2019
  2. chemistry

    I'd like to know how they come up with. The formula of hydrated copper sulfate

    asked on February 25, 2019
  3. Social study

    Why did Romans try to make their gods happy? A. because they believed the gods would help them convert to Judaism B. because they believed they could be put in jail for making the gods unhappy C. because they believed the gods would remove Julius Caesar

    asked on January 3, 2019
  4. Social studies

    Which ruler was most responsible for uniting Greece and building an empire? A. Alexander the Great B. Pericles C. King Philip D. Xerxes

    asked on December 11, 2018
  5. math

    Fred has 15 cows. John has twice as many cows as Fred had when Fred had as many cows as John has now. How many cows does John have?

    asked on November 21, 2018
  6. chemistry

    The specific heat capacity of iron is 0.45 j/g oC. how many joules of energy are needed to warm 1.3100000000000001 g of iron from 20.00oC to 29.00 oC ?

    asked on October 6, 2018
  7. Chemistry

    If a sample of oxygen at 20 degree celsius and 740mmHg weighs 16g what volume will it occupy

    asked on September 13, 2018
  8. chemistry

    how do you convert volume of gas to moles of solid?

    asked on April 22, 2018
  9. chemistry

    0.43g limestone and 98cm3 of carbon dioxide are produced on reaction with excess hydrochloric acid. How much calcium carbonate is present?

    asked on April 22, 2018
  10. Maths

    Plot the three points with first coordinate equal to (-2,8) and join them

    asked on April 6, 2018
  11. chemistry

    what is the condensed formula for the product of the hydrogenation of 2-butene using a palladium catalyst?

    asked on March 29, 2018
  12. chemistry

    What reagent is commonly used for alcohol oxidation? a. Na2Cr2O7 b.Benedict's Solution c.H2SO4 d. Tollen's Reagent

    asked on March 29, 2018
  13. IT

    What is the best HTML attribute in the world?

    asked on March 23, 2018
  14. Math

    I need help with the steps on how to do this following problem: Bert received a commission of $247.50. If he works for 15% commission what price of the cat did he sell?

    asked on March 8, 2018
  15. maths

    iam a 3 digit number. my tens digit is five more than my ones digit. my hundreds digit is eight less than my tens. what number am i?

    asked on February 17, 2018
  16. physics

    a ray of light strikes a rough surface such that the angle of incidence is 40.0. what is the angle of reflection 1. 0 degrees 2. 20.0 degrees 3. 40.0 degrees 4. the angle of reflection cannot be determined. I am confused between 3 and 4 but I think the

    asked on January 9, 2018
  17. physics

    microwaves with a wavelength of 15.0 cm strike a slit. What is the maximum slit width that will still result in a large amount of diffraction? 1. 7.50 cm 2. 10.0 cm 3. 15.0 cm 4. 30.0 cm This is a multiple choice and I think it's 7.50 cm. Could someone

    asked on January 8, 2018
  18. Chemistry

    What is the volume of oxygen required at standard temperature pressure to complete the combustion of ethanol of 2.3 grams of ethanol

    asked on October 23, 2017
  19. BC Calculus

    Fluid is flowing in a tube that has a radius of 3 centimeters. Water is flowing through a circular cross section at a rate of (9-r^2) cm/s, where r is the distance from the center of the cross section. What is the total amount of water that flows through

    asked on October 15, 2017
  20. science

    A body is dropped the roof of a building 10 mtr high calculate the time and speed g =10 m/s

    asked on August 1, 2017
  21. Calculus

    What how do you compute the sum of 1/2 + 1/4 + 1/8 + 1/16 + 1/32 +++ 1/2N ? ..

    asked on July 31, 2017
  22. Calculus

    What how do you compute the sum of 1/2 + 1/4 + 1/8 + 1/16 + 1/32 +++ 1/2N ?

    asked on July 30, 2017
  23. Math

    What is the square root 5900

    asked on July 21, 2017
  24. Math

    Insert grouping symbols to make 6+4x0=6

    asked on July 4, 2017
  25. History

    Is there something peculiar about Africa that delayed its drive for independence? (Begin with a specific African country, and argue your case.)

    asked on June 1, 2017
  26. scence

    which one of the following insects does not undergo the stage of egg,larva,pupa and adult? A.Wasp B. Locust C. Bee D. Moth

    asked on May 24, 2017
  27. math c

    A farmer planted cabbages in rows. Each row had 36 cabbages planted at regular intervals of 0.5m.what is the length of each row?

    asked on May 23, 2017
  28. math

    how many books each 1.5cm thick can be kept in a shelf 1.45m high

    asked on May 23, 2017
  29. english grammar

    1. Our high school would not ________until mid September mid-september mid-September . a. reopen b. re-open c. re open I think the answer is B 2. We were enjoying our break by indulging in ______activities a. childlike b. child-like c. child like I think

    asked on April 20, 2017
  30. english

    Because he was bourgeois coddled despotic _______ as a child, Rob was a rather self-centered teenager. dubious coddled despotic bourgeois 2.After hearing the raucous, cheering response to Adam’s speech, Mr. James feared that his new student body

    asked on April 20, 2017
  31. english

    Which phrase or sentence in this excerpt from Kurt Vonnegut's "Report on the Barnhouse Effect" demonstrates the use of irony? One long bench had been brought in for the ten of us privileged to watch. The television screens showed, from left to right, the

    asked on April 20, 2017
  32. Physics

    A step-up transformer has 500 turns on its primary and 1000 turns on its secondary. When the primary is connected to 100 V and the secondary is connected to a floodlight that draws 4 A, what is the power output?

    asked on April 10, 2017
  33. math

    mark is making gift bags for his friends. there are stickers in 1/4 of the gift bags. If mark makes 12 gift bags. how many wil contain stickers? 1/4x12=3 is this correct

    asked on March 18, 2017
  34. Math

    831.Let A = (1,3), B = (6,0), and C = (9,9). Find the size of angle BAC.

    asked on March 14, 2017
  35. Math

    The graph of x2 −6x+9+y2 +2y+1 = 25 is a circle. Where is the center of the circle? What is the radius of the circle?

    asked on March 14, 2017
  36. math

    Drawn in a circle whose radius is 14 cm, chord AB is 18 cm long. Calculate the angular size of minor arc AB.

    asked on March 14, 2017
  37. math

    a football match was played for two hours. a man arrives late for the match. what is the probability that he misses the only goal of the match which is scored at 30th minute of the match?

    asked on March 2, 2017
  38. Engineering Science N4

    A box of books has a mass of 46kg and is being towed by a rope which is oriented at 15 degree to the horizontal at a point where it is tied into a knot. If the pulling force is increased until the box begins to slide, determine the box's initial

    asked on February 23, 2017
  39. maths

    How much money will you have if you started with $45 and put it in an account that earned 10% every year for 20 years?

    asked on February 15, 2017
  40. physics

    A man holds a child on shoulders while watching a football match. How much work has he done if the game last for 2 hours

    asked on January 4, 2017
  41. Math

    , Two digit whole number between 30 and 80 my tens digit is one more than my ones digit I am a prime number what am I

    asked on December 7, 2016
  42. Math

    John wants to make brownies. To make brownies he needs 2/5 of a cup of flour per batch of brownies.if John has 2 cups of flour, then how many batches of brownies can John make?

    asked on November 20, 2016
  43. physics (urgent)

    A flywheel with a moment of inertia of 1.00kg m^2 is rotating at 100 rpm. What torque is required to bring it to rest in 10.0 revolutions?

    asked on November 5, 2016
  44. math (Help)

    Determine whether the equation defines y as a linear function of x. If so, write it in the form y = mx + b. 6x+√y-7=0 a. y=-6x-7 b. y=-6x+7 c. y=6x d. y is not a linear function of x

    asked on October 17, 2016
  45. Physics

    A 70 kg waterslide rider traveling at 15 meters per second hits a ramp with a 58 degree launch angle - How high will they fly?

    asked on October 11, 2016
  46. Algebra

    The bongo family has three children, including a pair of twins. The third child is 3 years younger than the twins. The sum of the three ages is 42. How old is each?

    asked on September 25, 2016
  47. calculus

    a ladder 10m long is leaning against a vertical wall with its other end on the ground. the top end of the ladder is sliding down the wall , when the top end is 6m from the ground it is sliding down at 2m/sec. how fast is the bottom moving away from the

    asked on September 22, 2016
  48. Physics (Momentum and collusion)

    Two balls of equal mass undergo a collision. Ball one is initially travelling horizontally with a speed of 10 m/s, ball two is initially at rest. After the collision, ball one moves away with a velocity of 4.7 m/s at an angle of 60 degrees from it's

    asked on September 6, 2016
  49. stat

    A college basketball player scored the following points in the 37 games he played his senior year: Stem-and-leaf of points n = 37 Leaf Unit = 1.0 1|33 1|66 2|1233444 2|5555666789 3|0222233444 3|89 4|23 4|7 5|2 The first quartile of his point totals is

    asked on September 4, 2016
  50. math

    One-half of a number plus three-fourths of the number is 2 more than four-thirds of the number. find the number .

    asked on August 21, 2016
  51. Math

    How far will a 4ft diameter wheel travel while making 100 revolution?

    asked on July 20, 2016
  52. Math

    95 is the product of vidya's savings and 5

    asked on July 16, 2016
  53. Physics

    “A rifle shot with a velocity of 270m/s at a target that is 400m away.if the shooter wants to directly hit target and what angle he must gire

    asked on July 10, 2016
  54. regents

    I have to take the Regents exam, but there are a great number of math regents exams. If I am in 11th grade,which one should I take??plz help , this is urgent! !😣

    asked on June 8, 2016
  55. Math

    I am asked to graph a translated parabola,ok, that's pretty easy, but, then,it says that it must be dobe with a dilatation of 2, does that mean that my axis is going to be this way:2,4,6,8,10...??

    asked on June 5, 2016
  56. chemistry

    I was given the following problem: what is the normality of a solution containing 6 grams of H2SO4 in a 200ml solution? my teacher obtained a normality of 39normals while I took into account that I had two hydrogen free and obtained a result of 0.6 N,

    asked on June 2, 2016
  57. Math

    Find two consecutive odd integers whose product is 323. Would the two numbers be 17,19 and -17,-19???

    asked on May 8, 2016
  58. Math

    A baseball is thrown upward. The path of the baseball models the equation h= -4.9t^2 + 9.2t + 1.6, where h is height of the ball, in metres, after t seconds. How long does it take the baseball to fall to the ground? Plzzz help

    asked on May 8, 2016
  59. math

    50 people purchase raffle tickets 3 winning tickets are selected at random if the first prize is $1,000, second prize is $500, and third prize is $100 in how many different ways can the prizes be awarded and is this a permutations or a combinations

    asked on May 7, 2016
  60. math 5th grade

    The width of a picnic table is 3 times its length. If the length is 5 6 -yd long, what is the area of the picnic table in square feet? sides are 2 1/2 yd and 5/6 yard. then to find area 2 1/2 x 5/6 = 2 5/12 y2 how do I find square feet?

    asked on May 5, 2016
  61. english

    1. Reich says, “When we see the contrast between the values we share and the realities we live in, that is the fundamental foundation for social change.” What do you think about that statement? How would you describe the disconnect between American

    asked on April 24, 2016
  62. math

    A ladder is placed against a wall with an angle between the ladder and the ground of 76°. If the ladder must reach 10 m up the wall, how long does the ladder need to be?

    asked on April 22, 2016
  63. Math

    The perimeter of a rectangular field is surrounded by 94 meters of fencing. If the field is partitioned into two parts as shown, a total of 113 meters of fencing is required. Find the dimensions of the field.

    asked on April 13, 2016
  64. Visual Basic

    how to use formula b=p (1+r)^n, to calculate annual interests for a savings account in visual basic project This is my code so far>>>>>>>>>>>>>> Option Explicit On Option Strict On Option Infer Off Public Class MainForm Private Function FV(ByVal p As

    asked on March 27, 2016
  65. Calc/Physics

    Find the following questions at the depth of 25\text{m}. The gravitational acceleration is g = 9.8\text{m/s}^2 and the density of water is \rho = 1000\text{kg/m}^3. a. Find the hydrostatic force on a square steel plate with sides 2\text{m} placed

    asked on March 14, 2016
  66. Math

    On a map, two cities are four and one-fourth inches apart. The scale of the map is one-half inch = three miles. What is the actual distance between the towns?

    asked on March 8, 2016
  67. Chemistry lab

    1)Why is it necessary to heat the alum until its mass does not change by more than 2mg? 2)Why its it necessary to store the alum in a disccator while it cools before measuring the mass? ( systhesis and analysis of alum crystals experiment)

    asked on February 23, 2016
  68. Science

    A flatt horizontal road is been designed for 60km/hr speed limit if the maximun acceleration of the car travelling on the road is to be 15m/s at the above speed limit.what is the minimun radius of the curvature of the curve on the road

    asked on February 2, 2016
  69. Machine

    Jack & Jill went to a well to fetch a bucket of water. The full bucket was 500N. Jack weighed 50kg and Jill weighed 40kg. How would you get bucket from the well

    asked on January 30, 2016
  70. Math

    x=natural gas it dropped by 2cent then increased by 25cents then dropped do I set up this equation?

    asked on January 29, 2016
  71. Math

    400 exercise books are arranged into 3 piles.The first has 5 more books than the 2nd pile.The number of books in the second pile is twice the number of books in the third pile.How many books are there in the third pile??

    asked on December 23, 2015
  72. PrimaryMatheMatics 4A textbook

    3000 Exercise books are arranged into 3 piles.The first pile has 10 more books than the second pile.The Number of books in the second pile is twice the number of books in the third pile.How Many books are there in the third pile?

    asked on December 22, 2015
  73. Introduction to computers

    Which type of updates should be installed in a test environment before being installed in a live enterprise environment?

    asked on December 14, 2015
  74. math/phys

    someone tell me why this answer is wrong...u are given final wavelength of 0.0022 nm, u want to solve for the intial wavelength using the compton scattering equation which is final wl -intial wl= 0.002426(1-cos(theta)) theta is 45 degrees. so initial w.l.

    asked on December 9, 2015
  75. chemistry please help me understand this

    What is the charge on Pd when it is coordinated with triphenylphosphine? PPh3. Pd(PPh3)4 .... Google tells me the PPh3 is a neutral ligand, how can this be if the metal has to have a charge associated with it?

    asked on November 30, 2015
  76. Physics

    A container is initially partitioned by a wall into two compartments. The left compartment has volume V1 and the right compartment has volume V2. Both compartments are filled with identical ideal gases at the same temperature T and with an equal number of

    asked on November 19, 2015
  77. Math

    What is the standard deviation for the given data. Round your answer to one more decimal place 3,5,6,6,9,1

    asked on November 15, 2015
  78. Math

    Each morning, the baker gets up early to bake products for the shop to sell throughout the day. He likes to have 36 boxes of each item available in the shop. How much of each item will he need to bake? (Remember to use equations with a letter standing for

    asked on November 12, 2015
  79. Math

    Please check to see if I did this correctly. This is a 2 part math problem. 1. Janelle has d dimes and n nickles. Her sister has 5 times as many dimes and 6 times as many nickles as Janelle has. Write the sum of the number of coins they have, and then

    asked on November 7, 2015
  80. Math

    A rectangle has a perimeter of 20 cm. The length of the rectangle is 1 more than twice the width. What is the measurement of the length and width of the rectangle?

    asked on November 4, 2015
  81. Finance

    What is the market price of a 5000.00 bond that matures in 9 years and pays 400.00 interest till maturity compounded semi annually?

    asked on October 25, 2015
  82. stats

    so the question is: the weights of fish in a certain lake are normally distributed with a mean of 10, a standard deviation of 6. if 4 fish are selected what is the probability that the mean weight will be between 7.6 and 13.6? so usually to find prob, we

    asked on October 25, 2015
  83. physics eq check

    just wanted to know if this is a correct substitution, we are given kinetic energy, and want the debroglie wavelength, that eq is lamba = h / p. = h/ mv Momentum in terms of KE: 1/2 m (p/m)^2 1/2 m p^2/m^2 KE = p^2/2m so... mv can be substituted as

    asked on October 22, 2015
  84. spelling

    I need to make a sentence using the word renaissance.

    asked on October 20, 2015
  85. Science

    The speed of a motorcycle increases from 10.0 km/hr to 50.0 km/hr in 9.0 seconds. What is the acceleration?

    asked on October 19, 2015
  86. science

    An aircraft lands with an initial velocity of 85 m/s and decelerates at 9.0 m/s2 until it travels at 4.0 m/s. (a) Calculate the distance travelled along the ground by the aircraft as it decelerates. (b) How long does this deceleration take? (First decide

    asked on October 16, 2015
  87. Computer Science

    Create an array to record the results of rolling a 6-sided die. The user determines the number of rolls. Output the results of each roll and the sum of all rolls. The rolls should produce a random integer from 1-6.

    asked on October 15, 2015
  88. Math

    Your friend is 1.2 times taller than you. Your friend is 64.5 inches tall. How tall are you?

    asked on October 14, 2015
  89. chemistry

    what does this mean: is (a molecule) sigma or pi in symmetry? the molecule in question is c triple bond c. has 2 pi bonds and 1 sigma bond....which is symmetrical?

    asked on October 12, 2015
  90. math

    My 10 digit double the one digit I am less than 50 and greater than 40

    asked on October 11, 2015
  91. math

    Need help figuring out what is the largest amount: 3000 c 400 pt 250 qt 500 gal

    asked on October 10, 2015
  92. physics

    in the compton scattering event, the scattered photon has an energy of 120 keV and the recoiling e- has an energy of 40 keV. Find the wavelength of the photon.

    asked on October 10, 2015
  93. physics (Compton effect)

    need helppp. Find the energy of an x-ray photon that can impart a maximum energy of 50 keV to an electron by Compton collision. Max energy being Kinetic Energy? do I just plug the 50*10^3 eV (convert to J) into the E=h (c/lambda) equation?? We are not

    asked on October 10, 2015
  94. chemistry (inorganic) reflection planes

    how many planes of reflection (sigma v) does the letter "H" have? an infinite amount? this is for an intro to group theory / symmetry operations.

    asked on October 7, 2015
  95. chemistry uncertainty rule

    if I want to find the uncertainty for a certain molar mass containing 4 atoms of Oxygen, do I multiply the error and the MM by 4: like this 4(15.9994 plus of minus .0003) = 63.9976 plus or minus .0012 (distribute the 4?) or follow the rules for mult. of

    asked on September 25, 2015
  96. 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 on September 19, 2015
  97. chemistry

    would NBr3O be polar or nonpolar?

    asked on September 18, 2015
  98. chemistry polarity

    would one consider the molecule NBr3O to be nonpolar or polar? I feel like all of the dipole moments will cancel, when you draw the VSPER structure the Br atom in the plane and out of the plane cancel, however O going up and the Br coming out of the plane,

    asked on September 17, 2015
  99. chemistry vsper/lewis polarity

    would one consider the molecule NBr3O to be nonpolar or polar? I feel like all of the dipole moments will cancel, when you draw the VSPER structure the Br atom in the plane and out of the plane cancel, however O going up and the Br coming out of the plane,

    asked on September 17, 2015
  100. physics relativistic energy

    I'm not too good with these special relativity problems :/ The question is: A 20 kiloton bomb releases 8 x 10^13 joules. How much mass must be converted into other forms of energy? You are already given Energy, would I still use the E=mc^2 formula??

    asked on September 12, 2015


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