Questions Asked on
July 18, 2011

Chemistry
Dinitrogen tetroxide decomposes to nitrogen dioxide: N2O4 (g) > 2NO2 (g) Delta H rxn: 55.3 kJ At 298 K a reaction vessel initially containing .100 atm of N2O4. When equilibrium is reached, 58% of the N2O4 has decomposed to NO2. What percentage of N2O4
asked by Tyler 
Chemistry
A 0.100g sample of a compound containing C, H, and O is burned oxygen producing 0.1783 g of CO2 and 0.0734 g of H2O. Determine the empirical formula of the compound.
asked by San 
math
Why do Eskimos wash their clothes in tide? 10 letters (doesn't have to be one word) The answers:Cold out tide,Too Cold Out, Its cold Out, and No tap water don't work.
asked by Kallie 
phy
A 3.50 kg block on a smooth tabletop is attached by a string to a hanging block of mass 2.80 kg. The blocks are released from rest and allowed to move freely. 1Is the tension in the string greater than, less than, or equal to the weight of the hanging
asked by ivan 
phy
A child goes down a playground slide with an acceleration of 1.36 m/s^2. 1Find the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 28.0 deg below the horizontal.
asked by pop 
English
in the sentence the man in the back row brought his friends with him what are the parts of the sentence
asked by Anonymous 
math
Al's Rentals charges $25 per hour to rent a windsurfer and a wet suit. Wendy's charges $20 per hour plus $15 extra for a wet suit. Find the number of hours for which the total charges for bot would be the same. What is the cost?
asked by Anonymous 
phy
A force of magnitude 7.50 N pushes three boxes with masses m_1 = 1.30 kg,m_2 = 3.20 kg, and m_3 = 4.90 kg .The mass is side by side. 1Find the magnitude of the contact force between boxes 1 and 2, and 2Find the magnitude of the contact force between
asked by susan 
chemistry
will the following solutions be acidic, neutral, or basic? Write the net ionic equation for any reaction that takes place. NH4Cl, KHCO3, LiClO4, NH4NO3, H2CO3, LiClO2, Ba(NO3)2
asked by chelsea 
Calculus
an open box is made by cutting out squares from the corners of a rectangular piece of cardboard and then turning up the sides. If the piece of cardboard is 12 cm by 24 cm, what are the dimensions of the box that has the largest volume made in this way?
asked by Andrew 
Chemistry
Consider the rxn during the Haber Process: N2 + 3H2 > 2NH3 The equilibrium constant is 3.9 x 10^(5) at 300 K and 1.2 x 10^(1) at 500 K. Find Delta H reaction and Delta S for reaction
asked by Tyler 
Chemistry
How many grams of PbCO3 will dissolve in 1.00L of 1.00M H+ is added to 5.00g of PbCO3?? PbCO3(s) + 2H+ (aq) > Pb2+ (aq) + H2O (l) + CO2 (g)
asked by San 
physics
Pelicans tuck their wings and freefall straight down when diving for fish. Suppose a pelican starts its dive from a height of 15.0 m and cannot change its path once committed. If it takes a fish 0.25 s to perform evasive action, at what minimum height
asked by victor 
british literature
review the metrical feet box on page 35 in your study guis and the model of scanned poem in your textbook page 42. then ,scan the following sonnet 73. mark the syllables, separate the feet with shorts vertical lines, and indicate the rhythem scheme that
asked by nancy 
phys science
A space shuttle orbits at an altitude of approximately 200km above the surface of the Earth. If the radius of the Earth itself is 6380 km, what’s the acceleration due to gravity at the altitude of the space shuttle?
asked by josh 
Geometry
Triangle ABC is congruent to triangle XYZ . Angle A measures 50 , angle B measures (2x+40) and angle X measures (4x+8) . Find the value of x.
asked by kim 
Trig
A bridge is built in the shape of a parabolic arch. The bridge has a span of s= 160 feet and a maximum height of h= 25 feet. Choose a suitable rectangular coordinate system and find the height of the arch at distances of 10, 30, and 50 feet from the
asked by EVJ 
math
The image of the point (1, 2) after a rotation of 180° about the origin is
asked by janine 
Calc
A Norman window consists of a rectangle capped by a semicircular regional. The perimeter of some particular Norman window must be 30 meters. The radius of the semicircular region is "x" meters. The height of the rectangle is "h" meters. Find the values
asked by Alex 
phy
A force of magnitude 7.50 N pushes three boxes with masses m_1 = 1.30 kg,m_2 = 3.20 kg, and m_3 = 4.90 kg .The mass is side by side. 1Find the magnitude of the contact force between boxes 1 and 2, and 2Find the magnitude of the contact force between
asked by ana 
Chemistry
determine the number of grams of KCl salt contained in 1.25L of a 5.00%(W/V) KCl(aq)
asked by Lori 
geometry
A transformation T : (x, y) (x + 3, y + 1). The preimage of the point (4, 3) is
asked by mattie 
chemistry
Calculate the heat of formationof benzene if the heat of combustion of benzene is 3260 kj/mol, given the following enthalpies of formation of the product. enthalpies of formation for O2= 0k (element) enthalpies of formation CO2 = 394kj/mol enthalpies of
asked by priya 
math
A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively; each unit of B requires 3, 4
asked by anonymous 
phy
A 45 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 22 deg , the crate begins to slide downward. 1What is the coefficient of static friction between the crate and the ramp? 2At what angle does
asked by poul 
calculus
A large soup can is to be designed so that the can will hold 54pi cubic inches of soup. The radius of the can is "x" inches and the height of the can is "h" inches. Find the values for the radius and the height such that the amount of metal needed is as
asked by Ben 
math
Water is flowing at a rate of 10 m3/s into the cylindrical tank shown below. a) Find the volume V of the water as a function of the water level h. b) Find h as a function of the time t during which water has been flowing into the tank. height of cylinder:
asked by lou 
chemistry
equilibrium CO(g)+2H2(g)CH3OH(g)calculate these concentrations:CO(g) in an equilibrium mixture containing 0.933mol/L H2 and 1.32 mol?l CH3OH.
asked by rocky 
Scholarship Essay
Why do I deserve this scholarship? 250 words or less. Any advice on the paragraph itself or on grammar is greatly appreciated. Throughout my life, I have faced multiple obstacles that I have not let hold me back. I am the first person in my family to not
asked by Angelina 
biology
In Drosophila melanogaster, cut wings (ct) is recessive to normal wings (ct+), sable body (s) is recessive to gray body (s+), and vermilion eyes (v) is recessive to red eyes (v+). All three recessive mutations are X linked. A female fly with cut wings,
asked by billy 
Math
Prove each identity: a) 1cos^2x=tan^2xcos^2x b) cos^2x + 2sin^2x1 = sin^2x I also tried a question on my own: tan^2x = (1 – cos^2x)/cos^2x R.S.= sin^2x/cos^2x I know that the Pythagorean for that is sin^2x + cos^2x That's all I could do.
asked by Kate 
chemestry
nitrous oxide (N2O) is used as an anesthetic. the pressure on 2.50 L of N2O changes from 105 k Pa to 40.5 kPa. If the temperature does not change, what will the new volume
asked by Anonymous 
Physics
A 1200 kg car accelerates to the right at 7m/s2 along a special frictionless track. Determine the magnitude and direction of the force the engine exerts to accelerate the car? A wind blows heavy winds into the car's path.As a result the car's acceleration
asked by Edward 
phy
When you push a 1.82{\rm kg} book resting on a tabletop, it takes 2.21 N to start the book sliding. Once it is sliding, however, it takes only 1.52 N to keep the book moving with constant speed. 1What is the coefficient of static friction between the
asked by pop 
Physics
A 10 kg block is pushed across a rough surface by a 25N force the block moves at a constant velocity when this force is applied. A) determine the magnitude of the friction force acting on the block B) What is the coefficient of friction between the surface
asked by Edward 
math
Minimize z = 3x + 6y subject to: 4x + y ? 20 x + y ? 20 x + y ? 10 x ? 0 y ? 0 Graph the feasibility region. Identify all applicable corner points of the feasibility region. Find the point(s) (x,y) that minimizes the objective function z = 3x + 6y.
asked by anonymous 
Chem
What would a titration curve look like for 25 mL of 0.400 M NH3 (aq) with 0.200 M HCl (aq) find initial pH find 1/2 equivalence point pH and volume of HCl required to reach this point find equivalence point pH and volume required to reach this point
asked by Sharon 
Physics!!
A centrifuge is a device in which small container of material is rotated at a high speed on a circular path. Such a device is a used in medical laboratories, for instance, to cause the more dense red blood cells to settle through the less dense blood serum
asked by Kelli 
algebra
Write an equation of the line parallel to the line given by 3x2y=8 and having the same y intercept as the line given by 2y+3x=4
asked by Eugene 
Chemistry
A line in the Lyman series of the hydrogen atom emission results from the transition of an electron from the n=3 level to the ground state level. a) What n level (#) is the ground state level for the hydrogen atom? b) What is the energy of this photon in
asked by Ashley 
phy
Pulling up on a rope, you lift a 4.05 kg bucket of water from a well with an acceleration of 2.50 m/s^2. 1What is the tension in the rope?
asked by lily 
Financial Accounting
ane Doe of Creative Marketing was recording transactions into the accounting records to prepare financial statements for the bank in a loan application. Her expenses were higher than anticipated and she was concerned about the effects on net income. As she
asked by Trisha 
Physics
15kg block rests on a rough surface (u=.35) a 100N force to the left is applied to the block. what is the magnitude and direction of the net force acting on the block? How quickly will the block accelerate over the rough surface?
asked by Edward 
chemistry
for the chemical reaction A+B= C+D, the following experimental data were taken to determine the ratelaw equation at 300K. determine the rate law for the chemical reaction. fromthe experiment data i found out the exponetial value... but 300k part confuses
asked by priya 
math
Maximize z = 16x + 8y subject to: 2x + y ≤ 30 x + 2y ≤ 24 x ≥ 0 y ≥ 0 Graph the feasibility region. Identify all applicable corner points of the feasibility region. Find the point(s) (x,y) that maximizes the objective function z = 16x + 8y.
asked by ANONIMOUS 
algebra
find the following product: 5x^2y(4x^5y^4)
asked by shay 
English
Correctly identifying the part of sppeech of each of the words in the sentences. Example: The boy hit the ball. The (definte article) boy (subject) hit (past tense verb) the definite article) ball (direct object). 1. Mother gave me a card for my birthday.
asked by Singh 
geometry
How to costruct a parallelogram named HEAR.HE=5cm,EA=6cm and angle R=85 degree.I WANT answer quickly.
asked by hafees 
math
The point (5, 2) is rotated 90° about the origin. Its image is
asked by katie 6 
phy
You pull upward on a stuffed suitcase with a force of 150 N, and it accelerates upward at 0.760 m/s^2. 1What is the mass of the suitcase? 2What is the weight of the suitcase?
asked by elis 
physics
a bus is driving through traffic as it makes a number of express stops. the bus drives at a speed of 10 m/s2 for 90 seconds then drives at a speed of 15m/s for 120 seconds before stopping for 30 seconds, then drives at a speed of 5m/s for 60 seconds before
asked by Edward 
physics
Hi I need to know how much ground water presuure would be required to lift a 1.200m diameter plastic tank weighing 650kg out of the ground please, Please supply the answer in Kpa or psi Cheers
asked by Spencer 
math
A company is planning to purchase and store two items, gadgets and widgets. Each gadget costs $2.00 and occupies 2 square meters of floor space; each widget costs $3.00 and occupies 1 square meter of floor space. $1,200 is available for purchasing these
asked by anonymous 
math
A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively; each unit of B requires 3, 4
asked by ANONIMOUS 
english
write the character sketch of phyllis from the novel "the railway children"by Enesbit
asked by wali 
Asaudeen seniur high school i.e mathematics
Find the range of value of x for which 13>3x23 where all the members are integers
asked by Dosumu 
math
Deposits of $1,000, $1,100 and $680 were made into a savings account, the first two years ago, the second 18 months ago, the third 6 months ago. How much is in the account now if the interest on all deposits is 12% compounded semiannually?
asked by Anonymous* 
math
128 3x5 7x+29 solve show all your work
asked by keshia 
chemistry
Determine the final pressure of a gas that has an initial pressure of 1.00 atm and is heated from 20 °C to 30 °C. Round to the nearest hundredth. Don't forget the units.
asked by Izzie 
AP HS Chemistry
I need help. In simple english please, what is Hund's Rule, Pauli Exclusion Principal, and the Aufbau Principal? I need to know these. Please try to be simple as possible because I'm not understanding right now, haha. Thanks!! :)
asked by Jordan 
algebra
Write an equation of the line containing the specified point and perpendicular to the indicated line. (6,0), 5x+4y=1
asked by Eugene 
algebra
One of the authors of this text is moderately active, weighs 87kg, is 185cm tall and is 59 yr old. what are his daily caloric needs?
asked by Mike 
math
2,500(1.65)^12=
asked by charles 
math
Write an equation of the line parallel to the line given by 3x2y=8 and having the same y intercept as the line given by 2y+3x=4
asked by keshia 
algebra
Essay. Show all work. Find the following quotient: 36x^249y^2  6x+7y
asked by Mike 
Chemistry
I wont to get concentartion by using A weight of chemical material and chemical formula.
asked by Haider 
Calculus
Find the derivative of: y= 5^x + 15/x^6 I'm assuming I need to take the natural log of each side, but I get stuck after that part.
asked by Carly 
intermediate algebra
Short Answer. the length of the side of a rectangular desk is given by 2x6ycm. the length of the front is given by 2x+6ycm. what is an algebraic expression for the area of the top of the rectangular desk? include correct units as part of your answer.
asked by sheba 
Operations Management
Setup Times Read the case study below “HiHo YoYo, Inc.”. Write a short summary of each of the four methods for selecting the order in which to release the products to printing. Complete a short analysis for each method which provides the average flow
asked by Gabe 
Physics
two forces act concurrently on a 5kg block resting on a smooth horizontal surface a 5N force making a 40degree angle with the surface and a 10n making a 20degree angle with the surface. A) Determine the magnitude and direction of the net force acting on a
asked by Edward 
Physics
A spring scale has a spring coefficient of 400 n/m. Determine the mass of an object if it causes the scale's platform to sink .08m.
asked by Edward 
math
What is the projected population over a period of 340 years in a region which begins with three couples?
asked by andrew 
algebra
Short answer. find the following product.(x+2)^2
asked by shay 
algebra
Short answer. find the following product.(y^26y+8)(y+8)
asked by shay 
math
solve: 4+8 1/2 : (1/4) to the third power. solve 11(x+30)=412 (5x18) please show your work
asked by keshia 
Math
what is $16,000 at 5% interest amortized over 16 months
asked by Linda 
Amortized Loan
What is the interest payment on $16,000 at 5% interest amortized over 16 months with $1,000 payment per month
asked by Linda 
math
(128)(3x5)(7x+29) = solve: show your work
asked by keshia 
health
Critically DISCUSS 5 WAYS IN WHICH THE SOCIAL OR ENVIRONMENTAL PROBLEM IMPACT ON THE COMMUNITY.PROVIDE RELEVANT SOURCES TO SUPPORT YOUR CLAIM
asked by Dk 
american government
the presidents roles such as chief executive and commander in chief :
asked by sue 
algebra
The halflife of 234U, uranium234, is 2.52 105 yr. If 97.7% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed
asked by sissy 
algebra
find the following product: 5x^2y(4x^5y^4)
asked by Mike 
algebra
short answer. find the following product 7z(8z^3+3z^2+8)
asked by Mike 
algebra
find the following product:(x3)(x+3)
asked by Mike 
math
4(x5)+2+x=3
asked by Anonymous 
intermediate algebraDivide
Essay: Show all work. A gardener wants to create a rectangular garden with length of 2x3y ft. and width of x+4y ft. What is an algebraic expression for the area of the garden? Be sure to multiply this out, express in simplest correct mathematical form,
asked by sheba 
math
4(x5)5+6x+7.44x
asked by Anonymous 
Calculus
A manufacturer can produce digital recorders at a cost of 60 dollars each. It is estimated that if the recorders are sold for P dollars a piece, consumers will buy q= 150p recorders each month. What is the average rate of profit obtained as the level of
asked by Carly 
math
solve using add. method 4x=6+5y 8x+4y=3
asked by jason 
physics
A race car is able to accelerate at a rate of 14m/s2. After exiting a turn at a speed of 15m/s, the car enters a straightaway and accelerates to a speed of 96m/s just as it reaches the end of the straightaway and enters the next turn. A)how long did it
asked by Edward 
english
I needed to change my thesis statement(last sentence). It was too long. Please review. Imagine being 6’3” in the eighth grade and everyone in the school making comments about your height. There are definitely advantages and disadvantages to being tall.
asked by lizzie 
Geometryhelp please :(
Construct a truth table for the statement. (p ↔ q) → p
asked by Jen 
Language art
What is a group of people at a dance with letters bssmyale
asked by andrea 
english
define this proverb "Hooks are every thing"
asked by wali 
Life orientation
Identify one environmental factor that causes ill health &disasters in our community
asked by Identify one environmental factor that causes ill health & disasters in our community 
algebra
Short answer. find the following product. 7z(8z^3+3z^2+8)
asked by shay 
psychology
Why would it be helpful if everyone learned something about childhood development?
asked by Sharon 
english
In the morning, thousands of birds appeared.
asked by jesse 
math
write an equation of the line parallel to the line given by 3x2y=8 and having the same y intercept as the line given by 2y+3=4
asked by keshia 
math
A deposit of $2,000 earns interest at a rate of 14% compounded quarterly. After two and a half years the interest rate changes to 13.5% compounded monthly. How much is in the account after six years?
asked by Anonymous* 
arithmetic
is my answer right? Q) Using a frame rate of 25 fps, what frame number will AviSynth give to the final frame of a 6second video clip? A. 25*6=150
asked by Sub 
Literature
Where can I get study questions for the story Julie of the Wolves?
asked by Max 
Math
Construct a truth table for the statement. (p ↔ q) → p
asked by Jen 
AP CHEM
Comparing the Noble Gases to the Alkaline Metals, what are major similarities and major difference between the two?
asked by Jordan 
Diatomic Molecules?!
Why do diatomic molecules form?!! :((
asked by ashly 
math
If i put 2,500 in a bank account with 6.5% interest rate 12 years ago,how much will be in the account now?
asked by justina 
mechanics
what is the kinetic energy of an object that has a mass of 20nkilograms and a speed of 2.8 m/s
asked by tina 
business ethics
2. Reah filed a case against her employer who dismissed her from service for reporting to work under the influence of alcohol. Which of these would be valid reason to contest the dismissal? a.)Reah's employer had not listed reporting to work after
asked by vedrana 
math
2,500(1.0650)^12=
asked by tommy 
Geometry
find m_DCB, given angles A and F are congruent, angles B and E are congruent, and m_CDE=26
asked by Lydia 
algebra
short answer. find the following quotient: x^236  x+6
asked by Mike 
math
4(x5)5=6x+7.44x
asked by Anonymous 
math
A transformation T : (x, y) (x + 3, y + 1). The image of B(4, 1) under this transformation is
asked by leah 
math
a/265.5+2a=9/13+20a/13+4/13
asked by Anonymous 
business ethics
A cookie company's management wants to increase the number of employees belonging to minority groups.They implement a policy determining that a fixed percentage of recruits should be members of groups Which legal constraint is breached by this decision?.A)
asked by vedrana 
us history
what were some tension over slavery in the 1840's?
asked by kelly 
Statistics
for 95 out 0f 100 of the same size, a 95% confidence interval of a parameter will include the thrue value of that parameter
asked by Shak 
criminal similation
what is criminal similation
asked by john 
physics
A man in manhattan is told that his destination is 26 blocks east at 30 degree angle uptown from where he stood on houston street determine how many blocks east and how many blocks uptown from where he stood.
asked by Edward