
Chemistry
250cm3 of 0.400moldm3 NaOH and 250cm3 of 0.400moldm3 HCl is allowed to react in a calorie meter. If the initial temperature of the system is 17.05 degree C and the final temperature is 19.55 degree C,Find the enthalpy of neutralization for the reaction.
asked by Anonymous on February 20, 2013 
Stats
A student hands each of 300 classmates 2 chocolates side by side on a plate. Of the 300 students, 171 choose the chocolate that¢s on their right hand side, and the remaining 129 choose the chocolate that¢s on their left. The student says, “That¢s just
asked by Help please!!! on July 29, 2013 
Physics  Forces
A 10 kg block is pressed against a vertical wall and held in place by a force F of 180 N, 37° above the horizontal. The coefficient of static friction μS=0.20. Find the magnitude and direction of the frictional force. The answer is 10.3 N downward but I
asked by Serina on March 7, 2017 
AP physics
Suppose a Chinook salmon needs to jump a waterfall that is 1.50 m high. If the fish starts from a distance 1.00 m from the base of the ledge over which the waterfall flows, find the x and ycomponents of the initial velocity the salmon would need to just
asked by Tifna on August 28, 2009 
Math
I am not sure which questions I got wrong but I am not getting the link correct to the next box. The website is mathbits(dot)com/caching/holiday/H30976.html I got these answers 1.) Choice 3 2.) Choice 2 3.) a.) Choice 2 b.) 63 4.) 8 To move on I need to
asked by Johnathan on January 7, 2016 
Physics
A model airplane with a mass of 0.748 kg is tethered by a wire so that it flies in a circle 30.2 m in radius. The airplane engine provides a net thrust of 0.806 N perpendicular to the tethering wire. (b) Find the angular acceleration of the airplane when
asked by Anonymous on November 17, 2010 
Precalculus
Find the distance that the earth travels in nine days in its path around the sun. Assume that a year has 365 days and that the path of the earth around the sun is a circle of radius 93 million miles. [Note: The path of the earth around the sun is actually
asked by Laura on March 20, 2019 
equilibrium constant (Kp)
What is the equilibrium constant "Kp" at 200 C for the reaction below: P4(s) + 6 Cl2(g) >
asked by k on July 20, 2011 
mathsurgently neededplse help
A manufacturer lists the price of the goods at Rs.240 per article. The wholesaler ge6ts a discount of 25% on the goods from the manufacturer. The retailers are allowed a discount of 15% on the list price by the wholesaler. The prescribe rate of sale tax at
asked by Anonymous on February 2, 2013 
Math Binomial theorem
I'm preparing for a test and one of the questions in my text is as follows: In a trivia contest,Sam has drawn a topic he knows nothing about, so he makes random guesses for the 10 T/F questions. Use the binomial theorem to help find a)the number of ways
asked by ann on April 17, 2011 
algebra
If Sam Stevens and four other friends want to schedule a 6 hour fishing trip on Lake Ontario with Reel Easy Sport Fishing. The cost for five people is $445. The cost for six people is 510. How much money per person will Sam and each of his friends save if
asked by Katherine on August 9, 2010 
chemistry
What is the equilibrium constant "Kp" at 200 C for the reaction below: P4(s) + 6 Cl2(g) >
asked by l on July 20, 2011 
Annuity!
When Raisel's son was born, she put $7,500 in an investment that earns 5.25% compounded quarterly. This investment will mature when her son turns 18 and will go straight into an annuity at 7.25% compounded and paying out monthly at the end of the period.
asked by Thara! on April 10, 2010 
physics
TVreception antennas for VHF (channels 2 through 13) are constructed with cross wires supported at their centers, as shown in Figure 23.24. The ideal length for the cross wires is onehalf the wavelength to be received, with the more expensive antennas
asked by Amelia on May 29, 2012 
Statistics
Bookstore has a website for which 90 percent of their book sales are to out of state customers and not subject to the collection of sales tax . The sample proportion of all sales to out of state customers from samples of size 100 will vary in repeated
asked by Teresa on April 3, 2016 
precalculus
graph y=sin(xpie/4) (couldn't find pie sign on my keyboard) Use 3.1459 We can't draw graphs for you here, but you can certainly make a table of values of x and corresponding values of y, and draw the graph yourself. you might save a little time by
asked by lisa on November 13, 2006 
Economics
The manager estimates that the total revenue from the sale of her firm's product is given by the equation TR = Q^2/2 and the total cost function is estimated to be TC = 5000+60Q+Q^2 A. What are the profitmaximizing levels of price and output? B. Find the
asked by Yonas on June 18, 2019 
Physics
A curve of radius 161 m is banked at an angle of 12°. An 840kg car negotiates the curve at 94 km/h without skidding. Neglect the effects of air drag and rolling friction. Find the following. (a) the normal force exerted by the pavement on the tires (b)
asked by Alex on July 19, 2011 
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 on July 18, 2011 
statistics
It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of the mean for this group
asked by Katie on April 15, 2014 
physics
An adventurous archaeologist crosses between two rock cliffs by slowly going hand over hand along a rope stretched between the cliffs. He stops to rest at the middle of the rope. The rope will break if the tension in it exceeds 25000N, and our hero’s
asked by mega on May 17, 2015 
Calculus
please help me...for the power series summation of n^4x^n/2(n1)factorial....find the radius i am guessing the radius is either x or x/2 but i am still not sure..CAN someone help me plz? PLZ HELP ME...i don't know where to start Take the ratio of two
asked by Maria on May 7, 2007 
physics
An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 4.9 × 104 kg, and the force causes its speed to change from 7600 to 5400 m/s. (a) What is the work done by the
asked by shaknocka on February 28, 2011 
algebra
a rowing team rowed 60 miles while going with the current in the same amount of time as it took to row 10 miles going against the current. the rate of the current was 5 miles per hour. find the rate of the rowing team in still water
asked by Anonymous on April 22, 2019 
algebra
tugboat goes 160 miles upstream in 10 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without a current and the speed of the current. speed of tugboat is speed of the current is
asked by scott on March 30, 2012 
Math
A bus travels 180 miles in same time a car travels 240 miles. if cars speed is 15mph faster than speed of bus, find the speed of car and bus.
asked by Sam on May 22, 2017 
Algebra
The length of a rectangular piece of steel in a bridge is 3 meters less then double the width. The perimeter of the piece of steel is 24 meters Find the length and width of the piece of steel. l=32w? is part of the formula?
asked by Christopher on May 7, 2014 
calculus
Find an equation of the tangent line to the curve at y = cosx  sinx (pi, 1) I found y'= sinx  cosx and used the equation of the tangent y = mx +b I input the values and get 1  [(sinx  cosx) * pi] = b the answer says it is y = x  1  pi I have no
asked by Daniel on October 14, 2011 
Math
A store sells used DVDs for $8 each and used videotapes for $6 each. Write a function rule to represent total selling price of DVDs and videotapes. Then use the function rule to find the price if 5 DVDs and 3 videotapes
asked by Ty on February 24, 2014 
Statistics
A survey found that 25% of pet owners had their pets bathed professionally rather than doing it themselves. If 20 pet owners are randomly selected find the probability that between 12 and 7 pet owners, inclusive, have their pets bathed professionally.
asked by Ashley on March 14, 2011 
Math
The age of ramesh and rahim are in the ratio 5:7. If ramesh was a years oldr and rahim was a years younger,the age of ramesh would have been twice age of rahim.find their age plz gve me sltn fst
asked by Simran kaur on November 3, 2012 
Economics
Based on the total world trade share with the given information, find the nations deficit or surplus. country A exports to country B: $35 country A exports to country C: $25 country B exports to country A: $30 country B exports to country C: $25 country C
asked by Hu on March 13, 2008 
probability
Let X be a nonnegative random variable. Find the PDF of the random variable Y=lnX for each of the following cases: For general fX, fY(y)= Correct answer: fX(e^y)*e^y 2. When fX(x) = {1/4, if 2
asked by navneethc on July 15, 2019 
Physics
A canoe has a velocity of 0.410m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.510m/s east relative to the earth. Find the magnitude of the velocity v⃗ c/r of the canoe relative to the river
asked by ana on February 19, 2014 
statistics
Five percent of all items sold by mail order company are returned by customers for a refund. Find the probability that, of two items sold during a given hour by this company, a) both will be returned for a refund b) neither will be returned for a refund
asked by Mikey on October 19, 2011 
math
3/4 of the students in a school were girls and the rest were boys. 2/3 of the girls and 1/2 of the boys attended the school carnival. Find the total number of students in the school if 330 students did not attend the carnival.
asked by Nai on October 29, 2012 
math
a manufacturer's cost is given by C= 300 cube root of n + 1200, where c is the cost and n is the number of parts produced. find the cost when 8 parts are produced. help please!!!! We have C = 300n1/3 +1200 Substitute 8 for n to get C = 300*81/3 +1200 You
asked by tay on October 13, 2006 
Trig
From a point A, 30 meters from the base of a building B, the angle of elevationto the top of the building C is 56 degrees. The angle of elevation to the top of flagpole D on top of the building is 60 degrees. Find the length of flagpole CD
asked by Ellie on November 20, 2016 
Math
One shuttle service charges $10 for pickup and $0.10 per mile. The other shuttle service has no pickup fee but charges $0.35 per mile. Find the number of miles for which the cost of the shuttle service is the same. Please help me and show your work thanks.
asked by Cathy on February 21, 2012 
math
how many square inches are in a square foot A square foot has 12 inches on each side. To find the number of square inches, multiply 12 x 12. You can also go to www.google.com and type in 1 square foot to square inches and press enter.
asked by krissy on September 26, 2006 
Algebra II
A rowing team rowed 50 miles while going with the current in the same amount of time as it took to row 25 miles going against the current. The rate of the current was 2 miles per hour. Find the rate of the rowing team in still water.
asked by Brice on April 2, 2014 
Math
The surface area of a golf ball is 8.92 in ^2. The surface area of a softball is 53.78. Find the ratio of the volumes of a golf ball to a softball. Surface Area = 4π r^2 and Volume = 4/3π r^3 I don't understand this problem, could someone please help me?
asked by Brianna on February 8, 2012 
algebra
the function, p(d) =1 d + ____ 33 gives the pressure, in atmospheres (atm), at an depth d in the sea (d is in feet). Note that p(0)=1 atm, p(33) =2 and so on. find the pressure at 120 feet. The pressure at 120 fee is ____ atm.
asked by spirit73 on September 23, 2009 
math
a tailor had 9m of cloth. after making a tablecloth and 4 cushion covers, she had 90 cm of cloth left. if she used twice as much coth to make each cushion cover as the tablecloth, find the lenght of cloth she used to make each cushion cover
asked by arvi on February 18, 2013 
algebra
Maria’s garden has 24 meters of fence and she wants to fence the rectangular garden with wall on one side of the garden. She needs no fence along the wall side. Find the largest area of the Maria’s farm that can be fenced.
asked by delisia on October 23, 2014 
Physics
I'm writing a prac report, and I just need something clarified. The experiment was different masses were attached on a hanging spring, then it had to be pulled down a certain distance, then find the period by finding the time fo each oscillation for each
asked by TP on March 28, 2009 
Physics
A bowling ball encounters a 0.76m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. If the translational speed of the ball is 3.80m/s at the
asked by CJ on March 21, 2007 
Physics
I'm writing a prac report, and I just need something clarified. The experiment was different masses were attached on a hanging spring, then it had to be pulled down a certain distance, then find the period by finding the time fo each oscillation for each
asked by TP on March 28, 2009 
Algebra 2
An Egyptian Pharoah has ordered the construction of 4 pyramids. The main pyramid will be the tallest, while the other 3 will each be half its height. All 4 must have a height to base length ratio of 2:3. The maximum amount of stone for construction is 30
asked by Tigger on September 15, 2017 
physics
An elevator with a wieght of 27.8 kN is given an upward acceleration of 1.22 m/s^2 by a cable. a) what is the tension in the cable. b) what is the tension when the elevator is declerating at the rate of 1.22m/s^2 but is still moving upwards? what exactly
asked by Chris on November 13, 2006 
Math(Please help)
1)tan Q = 3/4 Find cosQ 3^2 + 4^2 = x^2 9+16 = sqrt 25 = 5 cos = ad/hy = 4/5 Am I correct? 2) Use the sum and difference identites sin[x + pi/4] + sin[xpi/4] = 1 sinx cospi/4 + cosxsin pi/4 + sinx cos pi/4  cosx sin pi/4 = 1 2 sin x cos pi/4 =1 cos
asked by Abbey on March 16, 2010 
Probablity
The life time of a certain kind of batteries has a mean life of 400 hours and standard deviation as 45 hours. Assuming the distribution of life to be normal, find i) the percentage of batteries with a life time of atleast 470 hours. Ii) Out of 10000
asked by Kruti on October 1, 2015 
Math
An aeroplane travelling from town A to town C travels 9km due west to Town B and then 12km due south to town C. Sketch a diagram to represent the movement of the diagram from Town A to Town C Calculate the distance between Town A and Town C Find the total
asked by Lloyd on May 25, 2017 
Statistics
The marks of 100 students in an examination are normally distributed with mean of 25 marks and a standard deviation of 10 marks. (a) Given that the pass mark is 20, estimate the number of students who passed the examination. (b) If 5.59% of the students
asked by Anne on October 23, 2014 
statistics
twenty light bulbs are tested to see if they claims last long as the manufacturers claims they do. three light bulbs failed the test. two light bulbs are selected at random without replacement from this collection of bulbs find the probability that both
asked by bernie on July 29, 2016 
Physics
h t t p : / / i m g 2 0 5 . i m a g e s h a c k . u s / i / c a p t u r e b b . j p g / i am stuck on part c how do i find work with out using the spring constant work equals force parallel times displacement at which the force is acted during... Work done
asked by Kate on February 28, 2010 
Calculus
A cylindrical jar of radius 5 cm contains water to a depth of 8 cm. the water from jar is poured at a constant rate into a hemispherical bowl. After t seconds, the depth of the water in the bowl is x cm and the volume, V of water is given as
asked by RK on January 26, 2016 
Physics  Electric force, field, and potential
A 2μC charge is positioned at x = 0.8m and another 2μC charge is positioned at x = 0.8m. A positive test charge of q = 1.28*10^18C is positioned at the origin x = 0m. Find (a) the electric force exerted on q, (b) the electric field at the origin, and
asked by Kid on February 15, 2017 
Barber Scotia
your planning to buy a new computer monitor and printer for your office. you received the following prices: Store 1; Computer 2500 monitor 595 printer 398 Store 2 computer 2350 monitor 435 printer 349 find the total package price from each store and then
asked by Tamela on April 28, 2014 
Calculus (help Steve plz)
1) if w = , find w? 2) which expression is equivalent to (sin x+1) (sin x 1)? A. Cos^2x B. cos^2x C. Cos^2x+1 D. Cos^2x1 E. cos^2x1
asked by Breanna on November 28, 2012 
Math
Find the exact solution(s) of the system: x^2/4y^2=1 and x=y^2+1 A)(4,sqrt3),(4,sqrt3),(4,sqrt3),(4,sqrt3) B)(4,sqrt3),(4,sqrt3) C)(2,1),(2,1),(4,sqrt3),(4,sqrt3) D)(4,sqrt3),(4,sqrt3)
asked by Jon on February 21, 2008 
Math
Find the positive number such that 1/2 of the number multiplied by 1/3 of the number, multiplied by 1/6 of the number is equal to the number itself.
asked by Mark on December 12, 2012 
physics
an object with mass 10kg is at rest. It explodes into 4 pieces. A peice with mass 3kg travels NORTH at 5m/s, another piece 5kg travels at 30(degrees) NORTH of EAST at 2 m/s, and another piece 1.1kg travels 60(degrees) NORTH of WEST at 7 m/s. Find the mass
asked by danielle on February 20, 2007 
Math
I need help with this questions. a). An overhead garage door has two springs, one on each side of the door. A force of 15 pounds is required to stretch each spring 1 foot. Because of a pulley system, the springs stretch only onehalf the distance the door
asked by Danielle on April 1, 2008 
science
A man mass 75 kg and a boy mass 25 kg dives off the end of a boat of mass 300 kg so that their relative horizontal velocity with respect to the boat is 3 m/s. if initially the boat is at rest find its final velocity if (1) the two dive off simultaneously
asked by sjeba on August 30, 2013 
physics
equal masses m of stone and wood reach thermal equilibrium at T=290. the initial temperature of the wood reach is T=285. find the initial temperature of the stone.(specific heat of wood=1764 and specif heat of stone =882)
asked by kingwendu on January 23, 2013 
statistics/probability
The supply office for a large construction firm has three welding units of Brand A and three welding units that are not Brand A in stock. If a welding unit is requested, the probability is .7 that the request will be for Brand A. Find the probability that
asked by George on January 14, 2013 
Algebra
A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results were as follows: 31 said they drove alone, 39 rode in carpool, 35 rode public transportation, 10 used both carpool and public transportation, 7 used both
asked by Jodie on October 20, 2013 
Chemistry
I am stuck in this problem I need to calculate the molality first so I could find T but I don't know which one is the solvent and which one is the solution the problem is to calculate the freezing point of a solution containing 12.2g of benzoic acid,
asked by Maria on October 27, 2008 
statistics
A person owns both her own business and her own home and purchases a cariety of insurances to protect them. In any one year the probability of an insurance claim on the business is .4 and on the home is .05. Assuming that these are independent events, find
asked by Sharon on October 2, 2009 
Calculus 12th grade (double check my work please)
2 given the curve is described by the equation r=3cos ¥è, find the angle that the tangent line makes with the radius vector when ¥è=120¨¬. A. 30¨¬ B. 45¨¬ C. 60¨¬ D. 90¨¬ not sure A or D 2.) which of the following represents dy/dx when
asked by anon on March 6, 2011 
Mathamatics
A conference centre charges £120 to hire a room, with an additional charge of £8 for each delegate. (a) Find the total cost (including room hire) of a conference with 30 delegates. (b) Write down a formula for the total cost, C,in £,ofhiring a room for
asked by S Rey on June 4, 2010 
algebra
students in a biology class just took a final exam. a formula for predicting the average exam grade on a similar test t months later is. s(t)=7815log(t+1) (a)find the students average score when they first took the final exam. (b)what would be the
asked by selina on May 11, 2010 
statistics
a company manufactures calculators in batches of 45 and claims that the rate of defects is 4%.find the probability of getting exactly 2 defects in a batch of of 45 if the rate of defects is 4%.if the store receives a batch of 45 calculators and finds that
asked by ally on December 6, 2009 
Math
A group of students are selling homemade oatmeal cookies at $3 per bag. The students spent $23 on all the supplies to make the oatmeal cookies. Which expression can be used to find the profit made from selling, w, bags of oatmeal cookies, after accounting
asked by Jerson on February 20, 2018 
Spanish Song Translation
Can someone please translate the last two stanzas of "Bonito" by Jarabe de Palo? I tried translating it but couldn't and so I tried to find a good translation that looked like a human and not a translator did it, but that didn't work out either. So now I'm
asked by Suchindram on October 31, 2009 
Physics!!!!!!
In a scene in an action movie, a stunt man jumps from the top of one building to the top of another building 5.0 m away. After a running start, he leaps at an angle of 10◦ with respect to the flat roof while traveling at a speed of 5.6 m/s. The
asked by Anonymous on December 4, 2016 
Physics
A baggage carousel at an airport is rotating with an angular speed of 0.397 rad/s when the baggage begins to be loaded onto it. The moment of inertia of the carousel is 2440 kg·m2. Ten pieces of baggage with an average mass of 16.5 kg each are dropped
asked by Ben on January 27, 2014 
physics
Oxygen diffuses from the surface of insects to the interior through tiny tubes called tracheae. An average trachea is about 2mm long and has crosssectional area of 2×10−9m^2. Assuming the concentration of oxygen inside is half what it is outside in the
asked by Anonymous on May 13, 2014 
English/Reading
I need 3 examples of metaphors and personification in the Book I am Regina by Sally M. Keehn Please tell us what you've found, and we'll be glad to critique your answer. I cannot, since I haven't ever read that book, but there are excellent explanations of
asked by ReJeana on April 10, 2007 
Physics
A baggage carousel at an airport is rotating with an angular speed of 0.397 rad/s when the baggage begins to be loaded onto it. The moment of inertia of the carousel is 2440 kg·m2. Ten pieces of baggage with an average mass of 16.5 kg each are dropped
asked by Sam on January 27, 2014 
math
three of these puzzles have more than one answer. try to find all the possible answers for each puzzle one of these puzzle is impossible. 1.my number is a factor of 20. it's also a factor of 30. 2. my number is a multiple of 10. it's a factor of 45. 3. my
asked by phil on September 11, 2008 
math
Three of these puzzles have more than one answer. Try to find all the possible answers for each puzzle. One of these puzzles is impossible. 1.My number is a factor of 20.It's also a factor of 30. 2.My number is a multiple of 10.It's also a factor 45. 3.My
asked by phil on September 11, 2008 
Calculus help and please check answer for a)
The decay of a certain substance is modeled by the function N(t)=100(3+e^(t/3), where the number of particles is represented by N in a time of t hours. a) what is the initial number of particles?  I set t as 0 and got an answer of 400 particles initially
asked by Sara on February 13, 2015 
Electric forces
An electron is released above the earth's surface. A second electron directly below it exers just enough of an electric force on the first electron to cancel the gravitational force on it. Find the distance between the two electrons. I thought if I just
asked by Sara on April 11, 2007 
Education
I need help with this assignment or some ideas please, I need to come up with an example of how two domains affect each other like physical, social, and emotional with children. I was trying to figure out how I can give an example of a 2 year old girl
asked by clark on September 1, 2006 
Physics
A military gun is mounted on a railroad car (m = 1500 kg). There is no frictional force on the car, the track is horizontal, and the car is initially at rest. The gun then fires a shell of mass 30 kg with a velocity of 300 m/s at an angle of 40° with
asked by Jessica on April 23, 2016 
math
. A drama club was performed in an auditorium that has a capacity of 540. Students had to pay $7 a ticket and adults were charged $10. On opening night, the auditorium was full and they brought in $4764 in ticket sales. Write a system of equations to model
asked by jordan on December 20, 2015 
physics 211
A deepsea fisherman struggles to bring in a big salmon (see figure below). Find the force each hand must exert on the pole if the tension in the line is 159 N. Neglect the weight of the pole and assume that the force exerted by the left hand is directed
asked by Laura on April 4, 2011 
Physics
During a storm, a tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between two fence posts. The limb exerts a downward force of 148 N on the wire. The left section of the wire makes an angle of 12°
asked by Don on October 30, 2012 
World history
Why did Europeans sail across the Atlantic Ocean during the Age of Discovery? (Select all that apply.) A.European explorers tried to find oceanic routes to Asia to trade for spices. B.European explorers wanted to gain wealth and notoriety. C.European
asked by Jarod on February 28, 2018 
ARCHIMEDES PRINCIPLE
Using archimedes principle find the depth submerged of a log in water. Diameter 2.3cm radius 1.15cm, mass 37g, length of log 10cm, density of water 1000kg/m^3. Myself I can get to the submereged volume using Fb=Pvg but I don't know an equation for the
asked by Anonymous on December 6, 2016 
Chemistry(Please help)
The vapor pressure of diethyl ether is 463.57 mm Hg at 25 degrees celsius. How many grams of aspirin C9H8O4, a non volatile nonelectrolyte (mw=180.1g/mol), must be added to 216.7g of ether to reduce the vapor pressure to 453.74 mm Hg. Ether=74.12g/mol so I
asked by Hannah on February 19, 2012 
classical mechanic
A small cube of mass m1= 1.0 kg slides down a circular and frictionless track of radius R= 0.4 m cut into a large block of mass m2= 4.0 kg as shown in the figure below. The large block rests on a horizontal and frictionless table. The cube and the block
asked by juanpro on January 10, 2014 
Chemistry 1
You carefully weigh out 17.00g of CaCo3 powder and add it to 68.85g of HCl solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 78.88g . The relevant equation is CaCo3(s)+ 2HCl(aq)>
asked by Christy on May 30, 2011 
11th grade u.s. history
Im doing a project on the 12th amendment but im having a hard time finding the questions ive been working this for like well dis will be my 5th day working on it im not good at finding stuff on the internet anyway i have to find out why was the 12th
asked by A on September 28, 2009 
chemistry
A 8.408 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 12.53 grams of CO2 and 3.849 grams of H2O are produced. In a separate experiment, the molar mass is found to be 118.1 g/mol. Determine the empirical
asked by ALAN on February 19, 2017 
physics question
If you are asked to calculate the accleration due to gravity, is that not a trick question? We did an experiment similar to Galileo's (cart down a ramp and measure time, distance, acceleration, and at diferent inclinations)...but if asked to find the
asked by McHelpmeURGENT on September 17, 2007 
math116 appendix e
4. The line represents an estimate of the average cost of gasoline each year. The line estimates the price of gasoline in January of each year (“Consumer price index,” 2006). a. Do you expect the lines to be intersecting, parallel, or perpendicular?
asked by sandy on July 15, 2010 
Math
The bar graph shows the cumulative number of death form AIDS in the US, from 1990 through each of the years 19962002. The data in the graph can be modeled by the following polynomials, in which f(x) and g(x) represent the cumulative number of AIDS deaths
asked by Anonymous on May 17, 2012
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