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2011
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Questions Asked on May 2, 2011

What intermolecular force exists between the CH3CH2CH3 , CH4 , or the "CH3CH2"end of the ethanol molecule and the water
1. 3 answers
2. asked by ChemLover
3. 7,981 views
You wish to know the enthalpy change for the formation of liquid PCl3 from the elements shown below.P4(s) + 6 Cl2(g)--> 4
1. 1 answer
2. asked by Kat
3. 6,080 views
A solution is made by mixing exactly 500 mL of 0.178 M NaOH with exactly 500 mL of 0.100 M CH3COOH. Calculate the equilibrium
1. 5 answers
2. asked by Martina
3. 5,692 views
Based on the types of bonding in the following compunds, explain why you would expect: 1) calcium chloride (CaCl2) to be soluble
1. 1 answer
2. asked by James
3. 4,065 views
Electricity may be generated by rotating a loop of wire between the poles of a magnet. The induced current is greates when:a.Pla
1. 3 answers
2. asked by Annie
3. 2,714 views
An airplane heads due south with an air speed of 480km/h. Measurements made from the ground indicate that the plane's ground
1. 2 answers
2. asked by Anonymous
3. 2,705 views
howw would you define the speaker's love for annabel lee ?would you want to feel or be the object of such a love ? explain why
1. 1 answer
2. asked by ana
3. 2,612 views
$3,000,000,000,000,000 how much is this in words?
1. 12 answers
2. asked by sammy
3. 2,483 views
A 300. kg roller coaster car is traveling at a constant speed of 15 m/s over a hill with a radius of curvature of 30. m.b. What
1. 2 answers
2. asked by robert
3. 2,282 views
why does the equation x^2=-9 has no real solutionwhy does the equation x^2 = 9 has two solutions
1. 1 answer
2. asked by Wendy Q
3. 2,066 views
A tennis player places a 55 kg ball machine on a frictionless surface. The machine fires a 0.065 kg tennis ball horizontally
1. 2 answers
2. asked by em
3. 1,906 views
What is the pressure exerted by a .500 mol sample of nitrogen in a 10.0L container at 20C?
1. 2 answers
2. asked by Morgan
3. 1,882 views
How many ways can a committee of 4 people be selected from a group of 10 people?
1. 1 answer
2. asked by ALAINI
3. 1,808 views
Hi... well anyways so I am in 7th grade but I'm taking 8th grade science...I think...I know for sure that I am in Accelerated
1. 6 answers
2. asked by Pate
3. 1,798 views
Supply the missing atomic symbol to complete the equation for the following nuclear fission reaction.1/0n +235/92U ------>
1. 1 answer
2. asked by Blaze
3. 1,783 views
A couple purchasing a home budget $1700 per month for their loan payment. If they have $15,000 available for a down payment and
1. 1 answer
2. asked by Anonymous
3. 1,729 views
A glucose (C6H12O6) solution is 2.5% glucose by mass. If the density of thesolution is 1.10 g/mL, what is the molarity of
1. 5 answers
2. asked by Samantha
3. 1,630 views
A 10.0-mL solution of 0.30 M NH3 is titrated with a 0.100 M HCl solution. Calculate the pH after the following additions of the
1. 3 answers
2. asked by Martina
3. 1,618 views
A tennis player places a 55 kg ball machine on a frictionless surface. The machine fires a 0.065 kg tennis ball horizontally
1. 1 answer
2. asked by em
3. 1,545 views
10% (m/m) Sodium Hydroxide solution, NaOH(aq) is used to break down wood fibre to make paper.A) What mass of the solute is
1. 1 answer
2. asked by Saman
3. 1,541 views
Lakes that have been acidified by acid rain can be neutralized by the addition of limestone how much limestone in kilograms
1. 2 answers
2. asked by Jarred
3. 1,538 views
Two charges are separated by a distance d = 5 m. The charge q1 has a charge of q1= 7.0 µC (microcoulombs) and q2 has a charge
1. 2 answers
2. asked by marissa
3. 1,408 views
A beam, B1, of mass M1 = 0.6887 kg and length L1=1 m is pivoted about its lowest point at P1. A second beam, B2, of mass
1. 0 answers
2. asked by Catherine
3. 1,408 views
Clathrate hydrate research is done by Professor Ken Janda here at UC Irvine. Look up clathrate hydratewith a general search of
1. 1 answer
2. asked by CHEMBOB
3. 1,384 views
Mr. Badger bought 12 pens every month until their price rose to 15 cents each. Now he can only afford to buy 10 pens at the same
1. 1 answer
2. asked by Crissy XD
3. 1,343 views
What is the unit cell of calcium sulfide?anti-fluorite cesium cholride diamond fluorite graphite rutile sodium chloride zinc
1. 2 answers
2. asked by Lala
3. 1,342 views
A dentist has a 5.00 L cylinder of N2O at 20.0 atm and 25 degrees C what is the mass of gas in the cylinder
1. 1 answer
2. asked by tadd
3. 1,319 views
how much heat is required to melt an ice cube that is 4.2 cm x 2.1 cm x 2.9 cm? The density of ice is 0.92 g/cm3
1. 1 answer
2. asked by Sam
3. 1,310 views
A 120-V motor has mechanical power output of 3.20 hp. It is 81.0% efficient in converting power that it takes in by electrical
1. 1 answer
2. asked by iva
3. 1,293 views
An executive invests $24,000, some at 7% and some at 5% annual interest. If he receives an annual return of $1600, how much is
1. 1 answer
2. asked by Maerika
3. 1,285 views
An object of mass 1.5 kg is placed on a rough horizontal surface, as shown in Figure 1. Force F acts on the object. When the
1. 2 answers
2. asked by mimi
3. 1,281 views
3Ca(NO3)2(aq)+2Na3PO4(aq)->Ca3(PO4)2(s)+6NaNO3(aq)(a) the grams of Ca3(PO4)2 that can be obtained from 126 mL of 0.750 M
1. 0 answers
2. asked by Sam
3. 1,280 views
You have a tuning fork of unknown frequency. When your ring it alongside tuning fork with frequency of 360Hz, you hear beats at
1. 2 answers
2. asked by silly
3. 1,277 views
which of the following properties of a sound wave determines its pitch: wavelength, speed, amplitude, or frequency?Plese show
1. 1 answer
2. asked by silly
3. 1,256 views
can you please help me with compare and contrast Lans, Wans, Cans,Mans, Hans
1. 1 answer
2. asked by belinda
3. 1,197 views
A truck traveling at a constant speed of 30.6 m/s passes by a police car which is at rest. The police officer catches up to the
1. 0 answers
2. asked by alya
3. 1,194 views
OK, I know, I'm postin this way too many times but I'm halfway there now....Newton’s Law of Gravity specifies the magnitude of
1. 2 answers
2. asked by Abi
3. 1,178 views
Sound waves in iron have a speed of about 5100 m/s. If the waves have a frequency of 400 Hz, what is their wave length?I am
1. 1 answer
2. asked by silly
3. 1,132 views
how much heat is required to melt an ice cube that is 4.2 cm x 2.1 cm x 2.9 cm? The density of ice is 0.92 g/cm3
1. 0 answers
2. asked by Sam
3. 1,132 views
Hi, I'm writing this essay on whether it is better to know the truth or it is not. And I said it is better to know because the
1. 3 answers
2. asked by Kat
3. 1,128 views
If acoin roll at 1.5m/s and later rolls at 4.5m/s with an acceleration of 2 meters per squared second how long will it take to
1. 0 answers
2. asked by Clueless
3. 1,118 views
what is the theme in the poem phenomenal women by maya angelou
1. 2 answers
2. asked by lrihj
3. 1,112 views
You tie a battery powered, fixed-frequency buzzer to the end of a string and swing it around in a large horizontal circle. Your
1. 0 answers
2. asked by silly
3. 1,107 views
what is self delusion? the definitions online are very confusing..Can someone explain it to me in simpler terms. Also would
1. 5 answers
2. asked by aria
3. 1,104 views
500 grams of water at 0 degrees C was heated to a boiling in a large pot. how much energy was needed? what was the temperature
1. 1 answer
2. asked by amanda
3. 1,093 views
if you kick a football at a 30 degree angle, how many seconds is it in the air, and how high does it go
1. 0 answers
2. asked by johnny
3. 1,086 views
In chemistry, we did a lab using zinc as the standard and forming galvanic cells with it and another solution. We determined the
1. 1 answer
2. asked by Sam
3. 1,076 views
Sorry to repost this, again, but I still don't understand.Newton’s Law of Gravity specifies the magnitude of the interaction
1. 0 answers
2. asked by Abi
3. 1,058 views
Decide on what substitution to use, and then evaluate the given integral using a substitution. HINT [See Example 1.] (Round your
1. 3 answers
2. asked by Ashley
3. 1,057 views
Default risk) You buy a very risky bond that promises a 9.5% coupon and return of the$1,000 principal in 10 years. You pay only
1. 0 answers
2. asked by Anonymous
3. 1,051 views
Sorry to repost this, again, but I still don't understand.Newton’s Law of Gravity specifies the magnitude of the interaction
1. 1 answer
2. asked by Abi
3. 1,036 views
A box 5 m long, 2 m wide, and 2 m high applies 12 Pa of pressure to the table that it is resting on. How much force does the box
1. 1 answer
2. asked by Anonymous
3. 1,033 views
A developer is interested in a parcel of land for a small mixed use development. Similar developments are worth $15 million and
1. 0 answers
2. asked by Courtney
3. 1,030 views
A rocket carrying a weather satellite is launched. As it moves through space, the rocket is tracked by two tracking stations
1. 2 answers
2. asked by Mhy
3. 1,024 views
Compute f'(e) where f(x)=3^(xlnx)
1. 1 answer
2. asked by Morris
3. 1,008 views
Sodium carbonate can be made by heating sodium bicarbonate:2NaHCO3(s) �¨ Na2CO3(s) + CO2(g) + H2O(g) Given that ƒ¢H�‹ =
1. 1 answer
2. asked by Nicole
3. 1,004 views
The Apollo 8 mission in 1968 included a circular orbit at an altitude of 111 km above the Moon’s surface. What was the period
1. 1 answer
2. asked by Cora
3. 998 views
A mixture of Nitrogen and Argon gases in a balloon exerted a pressure of 2.55 atm. Given that there were 1.0 g nitrogen gas and
1. 1 answer
2. asked by Mandy
3. 998 views
-1 minus 8 equals? is 7 the correct answer
1. 3 answers
2. asked by cassandra
3. 987 views
What does the term "ethics" mean? With what ethical standards must students comply? Are ethical standards higher for those in
1. 1 answer
2. asked by Brea
3. 983 views
what do they mean? could you please change into a modern language?ROM: If I profane with my unworthiest hand This holy shrine,
1. 1 answer
2. asked by kim
3. 977 views
can someone please explain how to indicate where a label appears in a product? for example:where the label appears in
1. 0 answers
2. asked by ana
3. 962 views
How will the current in a wire change as the wavelength of light changes?I have no idea how to do this.
1. 0 answers
2. asked by ashley --- HELP PLEASEE!!!
3. 955 views
If molly tosses a coin and rolls a number cube, what is the probability of the coin landing heads up and the number cube
1. 5 answers
2. asked by jill
3. 950 views
How do I solve a problem like this:p^3m^2/7 + p^2m^3/21 - p^4m/14 Can you please help?
1. 1 answer
2. asked by Diana
3. 950 views
A 50 lb bar rotates clockwise 2 rad/s. The spring attached to its end always remains vertical due to the roller guide at C. If
1. 0 answers
2. asked by help please
3. 947 views
Given that 2x + 7 greater than 11, x cannot be equal to?
1. 1 answer
2. asked by Tony
3. 942 views
If a stone is tossed from the top of a 250 meter building, the height of the stone as a function of time is given by h(t) =
1. 1 answer
2. asked by carol
3. 940 views
Jessica weighs 540 Newtons, According to Newton's 3rd law, if the Earth pulls on Jessica 540 N, then Jessica pulls on the Earth
1. 1 answer
2. asked by Kelli Kenyon
3. 937 views
In 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community
1. 28 answers
2. asked by Katlego
3. 931 views
A Norman window has the shape of a rectangle surmounted by a semicircle (see the figure below). If a Norman window is to have a
1. 2 answers
2. asked by Anonymous
3. 921 views
Hello, I need this question explained. You don't have to give me the answer ,but I just need a break down ..in order to know
1. 2 answers
2. asked by Natalie
3. 898 views
Name two institution organization that are involved in supporting or giving redress to these disaster.Eplain how these
1. 31 answers
2. asked by Mahlatse
3. 896 views
assume that the spool is a solid cylinder of radius 0.5m and a mass 5.0kg, and m=5.0kg. Find the angular speed of the spool
1. 0 answers
2. asked by Anonymous
3. 893 views
Two point sources produce waves of the same wavelength and are completely out of phase (that is produces a crest at the same
1. 1 answer
2. asked by silly
3. 889 views
Data:freezing point of pure cyclohexane: 6.0 degrees celcius Freezing point of unknown soluton: 1.6 degrees celcius weight of
1. 1 answer
2. asked by Tina
3. 888 views
Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in
1. 0 answers
2. asked by Bon Oncle
3. 883 views
A farmer has 200 acres of land suitable for cultivating crops A, B and C. The cost per acre of cultivating crop A, crop B and
1. 1 answer
2. asked by TALOFA
3. 882 views
3.5 X 10________ 7 x 10^-9
1. 1 answer
2. asked by john
3. 877 views
What are the steps of the order of operations? Why is it important that you follow the steps rather than solve the problem from
1. 1 answer
2. asked by Sammyg
3. 873 views
HCl(g) HBr(g) HF(g)Which of these gases has the fastest average speed? Which has the highest average kinetic energy?
1. 0 answers
2. asked by Mandy
3. 871 views
How does a search engine work?List the four main parts of an e-mail header.
1. 1 answer
2. asked by jason
3. 859 views
a nickle is what percent of a dollar
1. 2 answers
2. asked by Tracy
3. 854 views
a bootlenose dolphin jumps out of the water. the path the dolphin travels can be modeled by h=-0.2d^2+2d, where h represents the
1. 1 answer
2. asked by bob HELP NEEDED HELP NEEDED HELP NEEDED
3. 851 views
A homeowner planning a kitchen remodeling can afford a $200 monthly payment. How much can the homeowner borrow for 3 years at
1. 1 answer
2. asked by Anonymous
3. 837 views
we have a cube shaped box with a volume of 125 cubic centimeters. what is the least amount of wrapping paper you would need to
1. 1 answer
2. asked by lynn
3. 835 views
name att least 3 aspects that contribute through visual means. Give examples?
1. 2 answers
2. asked by tiffany
3. 826 views
Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in
1. 0 answers
2. asked by Bon Oncle
3. 811 views
The resultant vector of two particular displacement vectors dose not equal the sum of the magnitudes of the individual vectors.
1. 0 answers
2. asked by Becky
3. 808 views
A particular guitar string is supposed to vibrate at 192 Hz, but it is measured to actually vibrate at 212 Hz. By what percent
1. 0 answers
2. asked by ben
3. 804 views
To determine the mass percentage of an iron sample, the dissolved sample [iron exists at the start as iron(II)] was titrated
1. 0 answers
2. asked by Anna
3. 803 views
The Meredith Corporation issued $100 par value preferred stock 10 years ago. The stock provided an 8 percent yield at the time
1. 0 answers
2. asked by Sam
3. 798 views
The disney Golf classic starts with 64 golfers. the golfes form pairs and each pair plays amtch. the losers drop out nad the
1. 2 answers
2. asked by Alejandro
3. 793 views
what is the adverb in this sentence: pete sometimes pretends he is a strong, silent cowboy.
1. 1 answer
2. asked by nancy
3. 774 views
Sorry to repost this, again, but I still don't understand.Newton’s Law of Gravity specifies the magnitude of the interaction
1. 2 answers
2. asked by Abi
3. 771 views
Cry, the Beloved Country refers at various points to the fear that exists in South African society. According to the novel, what
1. 1 answer
2. asked by bob
3. 760 views
calculate the pH of a 1.25 x 10^-3 M HNO3 solution
1. 1 answer
2. asked by kathy
3. 750 views
Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in
1. 1 answer
2. asked by Bon Oncle
3. 746 views
What would happen the the wavelength of an organ pipe if you fill it with helium instead of air? What would happen to the
1. 1 answer
2. asked by silly
3. 739 views
When writing a paragraph, it is important that the topic sentence and supporting points within that paragraph be directly
1. 1 answer
2. asked by Elaine
3. 739 views

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