# paul

1. ## 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 ?
2. ## Chemistry

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

how do you convert volume of gas to moles of solid?
4. ## chemistry

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

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

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

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

What is the best HTML attribute in the world?

35. ## 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
36. ## 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
37. ## 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?
38. ## 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?
39. ## 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
40. ## 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?
41. ## 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?
42. ## 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
43. ## 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
44. ## 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
45. ## math

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

How far will a 4ft diameter wheel travel while making 100 revolution?
47. ## Math

95 is the product of vidya's savings and 5
48. ## 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
49. ## 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! !😣
50. ## 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...??
51. ## 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,
52. ## Math

Find two consecutive odd integers whose product is 323. Would the two numbers be 17,19 and -17,-19???
53. ## 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
54. ## 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

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?
56. ## 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
57. ## 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?
58. ## 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.
59. ## 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
60. ## 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
61. ## 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?
62. ## 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)
63. ## 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
64. ## 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
65. ## Math

x=natural gas it dropped by 2cent then increased by 25cents then dropped 43cents...how do I set up this equation?
66. ## 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??
67. ## 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?
68. ## Introduction to computers

Which type of updates should be installed in a test environment before being installed in a live enterprise environment?
69. ## 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.

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?
71. ## 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
72. ## Math

What is the standard deviation for the given data. Round your answer to one more decimal place 3,5,6,6,9,1
73. ## 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
74. ## 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
75. ## 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?
76. ## 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?
77. ## 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
78. ## 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
79. ## spelling

I need to make a sentence using the word renaissance.
80. ## 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?
81. ## 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
82. ## 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.
83. ## Math

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

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

My 10 digit double the one digit I am less than 50 and greater than 40
86. ## math

Need help figuring out what is the largest amount: 3000 c 400 pt 250 qt 500 gal
87. ## 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.
88. ## 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
89. ## 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.
90. ## 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
91. ## 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)
92. ## chemistry

would NBr3O be polar or nonpolar?
93. ## 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,
94. ## 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,
95. ## 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??
96. ## Physics Lorentz contraction

This seems like a pretty straightforward question but it's just not making sense at the moment. A meter stick is projected into space at so great a speed that its length appears to have contracted only 50 cm. How fast is it going? So you want the velocity,
97. ## math

you have 2 positive numbers. One number is one-fifth of the other number.The difference between the two numbers is 152, find the numbers.
98. ## chemistry

back again with another analytical Q, the question tells you to prep a 50 mL solution of a 750 ppm iron solution using ammonium iron III oxalate trihydrate (MM: 428.06 as a source of iron. Determine the mass of compound required. I'm assuming you would
99. ## Dimensional Analysis Chemistry

want someone to check if this is right, Q: The concentration of lead in drinking water in a home was found to be 2.1x10-9 M. What is the concentration in ppm? ppb? MM=207.2 g/mol. 1 ppm = 1 mg/L. A: 2.1x10^-9 mol/L x 207.2 g/ 1 mol x 1000 mg / 1 g =
100. ## physics

A bicycle is rolling down a circular portion of a path; this portion of the path has a radius of 8.73 m. As the drawing illustrates, the angular displacement of the bicycle is θ = 0.979 rad. What is the angle (in radians) through which each bicycle wheel