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2012
April

Questions Asked on April 10, 2012

You are planning to use a ceramic tile design in your new bathroom. The tiles are blue-and-white equilateral triangles. You
1. 4 answers
2. asked by Alexandra
3. 10,192 views
A 0.450-gram sample of impure CaCO3(s) is dissolved in 50.0 mL of 0.150 M HCl(aq). The equation for the reaction is:CaCO3(s)+2HC
1. 1 answer
2. asked by Katherine
3. 8,955 views
What NaCl concentration results when 209 mL of an 0.660 M NaCl solution is mixed with 492 mL of a 0.270 M NaCl solution?__
1. 2 answers
2. asked by Katherine
3. 6,220 views
12. In a calorimeter, 10 g of ice absorbs heat with an enthalpy of fusion of 334 J/g. What is the heat absorbed?q = mCHf I am
1. 2 answers
2. asked by JoJo
3. 4,623 views
Find the area of a decagon with a radius of 4mm.Find the area of an octagon with a radius of 10 cm.
1. 2 answers
2. asked by hope
3. 3,972 views
Calculate the solubility of cadmium sulfide, CdS, in mol/L, given the Ksp value as 8.0 x 10^-27.
1. 1 answer
2. asked by Anonymous
3. 3,937 views
A championship golfer uses a nine iron to chip a shot rightinto the cup. If the golf ball is launched at a velocity of 20 m/s at
1. 1 answer
2. asked by sayan
3. 3,760 views
A professional baseball diamond is a square. The distance from base to base is 90 ft. To the nearest foot, how far does a
1. 1 answer
2. asked by Cassie
3. 3,643 views
A square has diagonal length 13 m. What is the side length of the square to the nearest centimeter?
1. 1 answer
2. asked by Cassie
3. 3,510 views
An equilateral triangle has a height of 26 inches. What is the length of each side of the triangle to the nearest centimeter?
1. 2 answers
2. asked by Cassie
3. 3,461 views
Forces with magnitudes of 2000 newtons and 900 newtons act on the machine part at angles of 30 degrees and -45 degrees
1. 1 answer
2. asked by Cydni
3. 3,339 views
. Ksp for Fe(IO3)3 is 10-14. Two solutions, one being iron(III) nitrate and the other being sodium iodate, were mixed. At the
1. 1 answer
2. asked by Hannah
3. 3,256 views
17. You have the following equations:2S (s) + 3O2 (g) 2SO3 (g), H = 792 kJ 2S (s) + 2O2 (g) 2SO2 (g), H = ? 2SO2 (g) + O2 (g)
1. 1 answer
2. asked by JoJo
3. 3,087 views
HOBr (aq) <----> H+ (aq) + OBr- (aq), Ka = 2.3 x 10^-9Hypobromous acid, HOBr, is a weak acid that dissociates in water, as
1. 4 answers
2. asked by Confused
3. 2,990 views
thank you ms.sue.i will remember you forever! here's a special poem for you!ms.sue, she's my favorite teacher too. she gives me
1. 49 answers
2. asked by Celest
3. 2,967 views
Determine the mass of calcium hydroxide produced when calcium carbide (CaC2) reacts with 0.64 grams of water according to the
1. 4 answers
2. asked by Halie
3. 2,915 views
You set up a makeshift greenhouse by leaning a square pane of glass against a building. The glass is 4.5 ft long and it makes a
1. 1 answer
2. asked by Cassie
3. 2,864 views
Need help in AP chemistry on EquilibriumWhen heated, hydrogen sulfide gas decomposes according to the equation 2 H2S(g) ⇄ 2
1. 2 answers
2. asked by Sam
3. 2,552 views
What mass of sodium chloride is produced when chlorine gas reacts with 0.29 grams of sodium iodide? Unbalanced equation is given
1. 1 answer
2. asked by Halie
3. 2,500 views
16. You have a series of four chemical reactions (1--> 2 --> 3 --> 4). How do you calculate the H2 if you know the other H
1. 2 answers
2. asked by JoJo
3. 2,351 views
A square has a side length of 95. What is the length of the diagonal of the square? Express your answer in simplest radical
1. 4 answers
2. asked by Cassie
3. 2,349 views
Find the volume of a rectangular prism whose dimensions are twice those of another rectangular prism that has a volume of 120
1. 4 answers
2. asked by bianca
3. 2,320 views
How long will it take a 1630 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above?
1. 6 answers
2. asked by Amelia
3. 2,280 views
1.What is a reasonable estimate for the area of a circle with radius 4 cm?A. Area=12cm^2 B. Area=16cm^2 C. Area=24cm^2 D.
1. 5 answers
2. asked by Lauren
3. 2,276 views
An equilateral triangle has a perimeter of 120 inches. What is the area of the triangle? Express your answer in simplest radical
1. 2 answers
2. asked by Cassie
3. 2,176 views
A firm that sells e-books – books in digital form downloadable from the Internet – sells all e-books relating to
1. 2 answers
2. asked by Anonymous
3. 2,113 views
Calculate the net charge on a substance consisting of a combination of 4.3 multiplied by 1013 protons and 2.5 multiplied by 1013
1. 1 answer
2. asked by brooke
3. 2,001 views
.Two automobiles are equipped with the same single-frequency horn. When one is at rest and the other is moving toward an
1. 1 answer
2. asked by Anonymous
3. 1,946 views
A gun with a muzzle velocity of 1200 feet per second is fired at an angle of 6 degrees with the horizontal. Find the vertical
1. 4 answers
2. asked by Cydni
3. 1,867 views
A line has Cartesian equation 3x-2y+3=0 .Determine a direction vector for a line that is parallel to this line.Could someone
1. 1 answer
2. asked by Antia
3. 1,847 views
One enzyme- catalyzed reaction in a biochemical cycle has an equilibrium constant (K1) that is 10 times the equilibrium constant
1. 2 answers
2. asked by harry
3. 1,710 views
The amount of vitamin c in the breakfast cereal varies directly with the serving size. If 1 and 1/4 cups of cereal provides 10%
1. 2 answers
2. asked by Lizzy
3. 1,633 views
A square tablecloth has a line of embroidered flowers along the diagonal. The tablecloth is 48 inches on each side. How long is
1. 2 answers
2. asked by Cassie
3. 1,620 views
A 12 kg toboggan is pulled along at a constant velocity on a horizontal surface by a horizontal force of 11 NHow much horizontal
1. 1 answer
2. asked by Melissa
3. 1,594 views
A U-shaped tube is partly filled with water and partly filled with a liquid that does not mix with water. Both sides of the tube
1. 4 answers
2. asked by Adam
3. 1,533 views
During a workout, the football players at State U. ran up the stadium stairs in 61 s. The stairs are 145 m long and inclined at
1. 1 answer
2. asked by Amelia
3. 1,533 views
Solar cells convert what type of energy into electrical energy?chemical electromagnetic nuclear thermal Can someone please help
1. 2 answers
2. asked by kevin
3. 1,517 views
An alarm clock uses 5.0 watts of electric power. If the clock is plugged into 120 volts outlet, what electric current is in the
1. 1 answer
2. asked by FRANNY
3. 1,496 views
A double-slit interference experiment is performed with light from a laser. The separation between the slits is 0.58 mm, and the
1. 4 answers
2. asked by Angel
3. 1,492 views
Boxing gloves are padded to lessen the force of a blow.(a) Calculate the force exerted by a boxing glove on an opponent's face,
1. 1 answer
2. asked by Amelia
3. 1,492 views
You have 250mL of a 0.56M solution of sodium acetate. How many mL of 0.50M acetic acid should be added to make a buffer of pH
1. 1 answer
2. asked by Hannah
3. 1,487 views
What is molar solubility of Al(OH)3 at 25 degrees C given the solubility product Ksp = 5.0e-33?I set this up as Al^3+ + 3OH^-
1. 3 answers
2. asked by Hannah
3. 1,438 views
In 6 years, Jim wants to have $47,230 to buy a new car.(a) How much must Jim save each month if the interest rate is 6%
1. 1 answer
2. asked by F0reveryoung
3. 1,400 views
A bullet mass 10 g strikes a log with a mass of 25 g suspended from a 3 meter long string. The bullet lodges in the log which
1. 1 answer
2. asked by Mary
3. 1,344 views
A converging lens (f = 12.6 cm) is held 8.55 cm in front of a newspaper, the print size of which has a height of 2.10 mm.(a)
1. 1 answer
2. asked by linds
3. 1,324 views
If a tire rotates at 150 revs/min when the truck is travelling 40km/h, what is the circumference of the tire?4.44 meters
1. 1 answer
2. asked by Jarrod
3. 1,307 views
Using energy considerations, calculate the average force a 60.0 kg sprinter exerts backward on the track to accelerate from 2.00
1. 1 answer
2. asked by Amelia
3. 1,302 views
A ball is thrown upward with an initial velocity of 6.0m/s by someone on top of the building 34m tall who is leaning over the
1. 1 answer
2. asked by jackie
3. 1,290 views
write a paragraph of 5-7 sentences to explain how to study for a test. Include at least one single word adjective, one single
1. 2 answers
2. asked by meme
3. 1,287 views
Children climb 8 ft to the top of a slide. The end of the slide is 1 ft above the ground and the slide rises at a 45 degree
1. 1 answer
2. asked by Cassie
3. 1,253 views
A patient has been trying to achieve total blood cholesterol of 175 mg or less per 100 mL. A recent test result of a 3 mL blood
1. 1 answer
2. asked by Wyatt
3. 1,248 views
So.....if Jane has a budget of$290. How do I explain how I would find the amount she spent on books. Plzzz help!!
1. 6 answers
2. asked by Aby
3. 1,242 views
Need help with AP chemistry, specifically Acids and BasesThe acid ionization constant, Ka, for propanoic acid, C2H5COOH, is 1.3
1. 1 answer
2. asked by Sam
3. 1,230 views
determine whether the statement is true or false. If it is true, explain why it is true. If it is false, give an example to show
1. 1 answer
2. asked by jhony
3. 1,230 views
Mr.lopez is putting u a fence around his vegetable garden. The garden is shaped liked a rectangle. The longer sides are 14feet,
1. 1 answer
2. asked by Mr.lopez
3. 1,187 views
Using the information on the table of van der Waals Constants of Some Common gases, calculate the pressure exerted by 4.37 moles
1. 1 answer
2. asked by Kathi
3. 1,169 views
Touch a 5000-V charged balloon and you're not harmed because, although the energy/charge ratio is high, there is
1. 2 answers
2. asked by Kristie
3. 1,169 views
how do you solve this? A dice is rolled twice. What is the probability of getting a multiple of 3 on the first roll or a total
1. 2 answers
2. asked by A
3. 1,145 views
A roller coater has a first drop of 140 meters and then enters a circular loop. Find the maximum radius of the loop such that
1. 1 answer
2. asked by Mary
3. 1,111 views
Using energy considerations, calculate the average force a 60.0 kg sprinter exerts backward on the track to accelerate from 2.00
1. 2 answers
2. asked by Amelia
3. 1,097 views
Mandy's kitchen measures eight feet by seven feet. If she is making a scale drawing of one inch = two feet, how many inches will
1. 1 answer
2. asked by please help me!!
3. 1,081 views
for each of the molecules below, show the dipole you would expect. you must show the direction of the dipole - arrow head
1. 1 answer
2. asked by Jessica
3. 1,079 views
Hugo has a job interview at Telus. He has a 56% of waking up late on the morning of the interview. When he wakes up late he has
1. 0 answers
2. asked by Anonymous URGENT PLS
3. 1,065 views
Determine the 10th and 21st terms of the arithmetic sequence- 4+7x, 5+9x, 6+11x
1. 2 answers
2. asked by Nkululeko Hadebe
3. 1,059 views
1. Calculate the acetylsalicylic acid concentration (in mg/mL) of aspirin solution #2 in the Procedure section. Assume that 300
1. 1 answer
2. asked by Cassie
3. 1,058 views
an encyclopedia on cd-rom would be most appropriste for a typicaltow year old, three year old, four year old, eight year old
1. 1 answer
2. asked by rena
3. 1,050 views
1. As a sample of matter is cooled, which property of its particles increases? (1 point)average kinetic energypressure buoyancy
1. 4 answers
2. asked by NIKE
3. 1,040 views
The far point of a nearsighted person is 5.8 m from her eyes, and she wears contacts that enable her to see distant objects
1. 0 answers
2. asked by linds
3. 1,030 views
Hemoglobin, an oxygen-carrying protein in blood, contains 4 iron atoms per molecule and the iron comprises 0.34% of the
1. 2 answers
2. asked by Mike
3. 1,022 views
Find the exact values of sin 2theta, cos 2 theta and tan 2 theta when cot theta = 4/3
1. 2 answers
2. asked by Jim
3. 1,019 views
The 2nd amendment is "the right of the people to keep and use bear arms".what does Right to keep and bear arms means??? (please
1. 5 answers
2. asked by Laruen
3. 1,015 views
If you add 0.35grams NaF to 150mL of a 0.30M HF, what is the pH of the resulting solution?To start off would I use the value of
1. 1 answer
2. asked by Hannah
3. 1,014 views
Ca(OCl)2 + 2NaCl + 2H2SO4 <=> 2Cl2 + CaSO4 + NaSO4 + 2H2O[We have to prepare 12 ml of 0.050 M Cl2 (Chlorine water) ] [We are
1. 3 answers
2. asked by Bunny
3. 992 views
is there a way to, on an online video, copy the screen? I am watching a direct instruction for schoolwork and don't know if i
1. 1 answer
2. asked by ♥rebel•stupidity=kathy♥
3. 989 views
A horizontal segment of pipe tapers from a cross sectional area of 50 cm2 to 0.5 cm2. The pressure at the larger end of the pipe
1. 0 answers
2. asked by Malika
3. 986 views
SO this is my first time doing this... lol i need help on an AP chemistry question for equilibrium.A 0.500 L tank contains 3.00
1. 2 answers
2. asked by Sam
3. 985 views
Which of these are correct for an electric field? A) It's a vector quantity, and can be cancelled.B) Three of three are
1. 1 answer
2. asked by Kristie
3. 985 views
Find the height of a cone with a volume of 138 cubic meters and a base area of 46 square meters
1. 2 answers
2. asked by bianca
3. 963 views
What is the difference between hospital claims processing and professional (provider and/or CMS 1500) claims processing?
1. 0 answers
2. asked by Meagan
3. 959 views
A volatile liquid was allowed to evaporate in a 43.298g flask that has a total volume of 253 mL. The temp of the water bath wad
1. 0 answers
2. asked by tiffany
3. 957 views
Which of the following is the x-intercept of the plane 2x-4z+1=0?a) P(2,0,-4) b) P(0,0,0) c) P(-1/2,0,0) d) P(0,0,1/4)
1. 0 answers
2. asked by Jenny
3. 920 views
What is biomass energy?the chemical energy stored in living things the electromagnetic energy stored in living things the
1. 1 answer
2. asked by kevin
3. 920 views
A 1.70 kg object attached to a spring moves without friction and is driven by an external force given by F = (3.00 N) sin(2πt).
1. 1 answer
2. asked by Anand
3. 912 views
give equations showing the commercial methods for preparations of the halogen (F2, Cl2, Br2, I2)
1. 1 answer
2. asked by Maci
3. 911 views
show how you would obtain (the orbitals used) and the possible types (the orbitals produced) for hybridization of a carbon atom.
1. 1 answer
2. asked by Amanda
3. 909 views
Figure out a persons BMI with the formula B= 703w/h^2
1. 2 answers
2. asked by Yvette
3. 907 views
help me find which reactant is the limiting reactant when 74 g NaOH and 44 g CO2 are allowed to react when the equation is
1. 1 answer
2. asked by corey
3. 900 views
Calculate the Coulomb potential due to the nuclei at a point in a LiH molecule located 200 pm from the Li nucleus and 150 pm
1. 0 answers
2. asked by harry
3. 894 views
find a function f given that (1) the slope of the tangent line to graph of f at any point P(x,y) is given by dy/dx=3xy and (2)
1. 1 answer
2. asked by mabel
3. 871 views
Light falls on a double slit with slit separationof 2.19 × 10 −6 m, and the ﬁrst bright fringe is seen at an angle of 12.7
1. 3 answers
2. asked by Angel
3. 868 views
The source of all wave motion is ____________________. A) something vibrating.B) a harmonic object, or system of objects.C) any
1. 1 answer
2. asked by Jim
3. 863 views
I need help on this 1 question i have my answer, i just need to know whats the right answer....The least desirable method of
1. 2 answers
2. asked by s.
3. 849 views
A pair of narrow parallel slits separated by adistance of 0.253 mm are illuminated by the green component from a mercury vapor
1. 2 answers
2. asked by Angel
3. 847 views
Right triangle ABC has an area of 32^3 cm^2. The measure of <A=30, and the measure of <B=90. What is the length of BC, AB, and
1. 1 answer
2. asked by Cassie
3. 827 views
Demarcus wants his friend, Alvin, to guess which planet he is describing. He tells Alvin that the planet is rocky and doesn't
1. 7 answers
2. asked by Bella help please
3. 824 views
1. The surface tension in a cup of water is caused by _____. (1 point)attractive forces between the water and its containerattra
1. 8 answers
2. asked by NIKE
3. 817 views
a prominent physical feature along the west coast of england is th
1. 1 answer
2. asked by ♥rebel•stupidity=kathy♥
3. 810 views
A study of the students taking distance learning courses at a university finds that they are mostly older students not living in
1. 2 answers
2. asked by Anonymous
3. 786 views
I don't remember sampling methods... i do know that there are three and one of them is litteraly called 'random'.if i can please
1. 5 answers
2. asked by Iva
3. 783 views
Electric potential is measured in units of ____________________. A) watts.B) joules per coulomb, or volts.C) joules.D) ohms.E)
1. 0 answers
2. asked by Kristie
3. 780 views

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