Questions Asked on
May 11, 2012

Chemistry 2B  UC Davis
Now calculate Kb the base dissociation constant for [C2H3O2], acetate anion, for each of your trials from the concentrations of species at the equivalence point. Report 3 significant figures, e.g. 5.97E10.
asked by Tim 
Chemistry
Write the balanced chemical equation for each of these reactions. Include phases. When aqueous sodium hydroxide is added to a solution containing lead(II) nitrate, a solid precipitate forms. However, when additional aqueous hydroxide is added the
asked by Sarah 
gEoMeTrY iNsCrIbEd AnGlEs MuLtIpLe ChOiCe QuEsTiOn
A satellite, B, is 17,000 miles from the horizon of Earth. Earth’s radius is about 4,000 miles. Find the approximate distance the satellite is from the Earth’s surface. {The picture is a circle with point O in the center, point C is on the top center
asked by aYaMe ;) 
physics
A hair dryer draws a current of 9.7 A. (a) How much charge passes through the hair dryer in 3.5 min? 1 C (b) How many electrons does this represent? 2 electrons
asked by Alice 
Chemistry
For the oxidationreduction reaction equation given here, 2Rb+Br2 > 2RbBr Indicate how many electrons are transferred in the formation of one formula unit of product.
asked by Jematormal91 
Chemistry
For the following battery: Cd(s)  CdCl2(aq)  Cl–(aq)  Cl2(l)  C(s) Write the reduction half reaction for the C(s) electrode.
asked by Jematormal91 
Chemistry!!
Calculate the pH at the equivalence point for the titration of 0.180 M methylamine (CH3NH2) with 0.180 M HCl. The Kb of methylamine is 5.0Ã— 10^â€“4.
asked by Sarah 
PHY
A dragracing car accelerates forward because of the force exerted on it by the road. Why, then, does it need an engine? Explain. what is the answer plz
asked by MHD 
math
write 0.000436 in scientific notation answer 4.36 X 10^4
asked by pls check 
math
A ball is kicked from ground level into the air. Its height y, in feet, after x seconds can be represented by the equation y = 40x 16x^2. What is the total elapsed time, in seconds, from the time the ball is kicked until it reaches grond level again? Is
asked by Jane 
chemistry
As a technician in a large pharmaceutical research firm, you need to produce 200 mL of 1.00 M a phosphate buffer solution of pH = 7.06. The pKa of H_2PO_4}^ is 7.21. You have 2.00 L of 1.00 M KH_2PO_4 solution and 1.50 L of 1.00 M K_2HPO_4 solution, as
asked by teja 
Math 12
A hard rubber ball is dropped from a moving van with a height of 5 metres. The ball rises to 80% of the previous height after each bounce. a) determine the total vertical distance the ball has traveled when it strikes the ground the eighth time. b)
asked by Steven 
Physics 6A
A 330 piano slides 3.8 down a 23 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. a.Determine the work done by the force of gravity. b.Determine the work done by the man on the piano.
asked by Daisy 
sociology 100,social structure
You are walking down the street and in looking around, you can’t help but notice that half or more of the people you see are overweight. How do you explain this observation? Is obesity a personal issue or a societal one? If you were C. Wright Mills, how
asked by sarah 
geomtry
The base of a 6inch long ice cream cone with a diameter of 2 inches, is cut 0.25 inches from the base. The left over shape resembles a cylinder. What is the BEST estimate for this shape's volume?
asked by kelle 
physics
A skydiver jumps out of a hovering helicopter, so there is no forward velocity. Use this information to answer questions 1 to 9. Ignore wind resistance for this exercise. What is the skydiver's acceleration?
asked by kelly 
Math
A bag of hard candy contains 8 cherry candies, 6 grape candies, 7 pineapple candies, and 4 lime candies. Juan takes one candy from the bag without looking. What is the probability that he chooses a cherry candy?
asked by Christ B 
physics
A 20.0kg model plane flies horizontally at a constant speed of 12.2 m/s. (a) Calculate its kinetic energy. . J (b) The plane goes into a dive and levels off 20.0 m closer to Earth. How much potential energy does it lose during the dive? Assume no
asked by Brianna 
ellipses
If the major axis is vertical and has a length of 10 units,the minor axis has a length of 8 units,and the center C=(4,2).Fill in the missing denominators for the equation and determine the distance from C to the foci (c).
asked by Daniel 
chemistry
a balloon is filled to a volume of 7.00 x 10 to the second mL at a temperature of 20.0 degrees celcius. the balloon is then cooled at a constant pressure to a temperature of 100 k. what is the final volume of the balloon?
asked by karen 
Math
Each fence section has a post at each end. How many posts are needed to build a fence with 10 sections? Is it 8, 11, 10 or 9 posts ?? Please explain to really want to understand this!!
asked by Mack 
Chemistry
A 0.140mole quantity of CoCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Co^2+ ions at equilibrium? Assume the formation constant of Co(NH3)6^2+ is 5.0Ã— 10^31.
asked by Sarah 
Geography
volcanic activity that formed much of the Malay Archipelago also created what? typhoons, tropical rainforests, fertile soil, all of the above? I think tropical rain forests, am I right?
asked by poisoned thorn 
economics
The ownermanager of Good Guys Enterprises obtains utility from income (profit) and from having the firms behave in a socially conscious manner, such as making charitable contributions or civic expenditures. Can you set up the problem and derive the
asked by Ashaki 
business
What are the advantages of having an ethics office or officer report to a company’s chief executive officer, the legal department, human resources, or audit? What are the disadvantages?
asked by Priscilla 
Chemistry
Calculate the [H+] of a solution obtained by mixing 1 L of hydrochloric acid 1.0 M with 1 litre of sodium hydroxide 0.990 M.
asked by Katie 
physics
A 17kg rock is on the edge of a 103m cliff. (a) What potential energy does the rock possess relative to the base of the cliff? . J (b) The rock falls from the cliff. What is its kinetic energy just before it strikes the ground? J
asked by Brianna 
Geometry
Find the volume of the given prism 17m 2m 1m
asked by Eduardo 
Physics
An archer puts a 0.26kg arrow to the bowstring. An average force of 200 N is exerted to draw the string back 1.4 m. (a) Assuming no frictional loss, with what speed does the arrow leave the bow? m/s (b) If the arrow is shot straight up, how high does it
asked by Brianna 
scince
One molecule of water (H2O) contains two atoms of hydrogen and one atom of oxygen.A hydrogen atom has a mass of 1.0 u and an atom of oxygen has a mass of 16 u, approximately. (a) What is the mass in kilograms of one molecule of water? (b) How many
asked by teja 
Chemistry
A 100 mL container is filled with 0.01 mol of A2B3. At equilibrium, it also contains 0.006 mol of B. Find the value of K. A2B3(g) > 2A(g) +3B(g)
asked by Sandra 
physics
what is the net electrostatic force on the charge q3 48ìc due to charges q1 (+78µC) and q2 (+50µC)
asked by Rodney 
Ap physics
Four resistors are connected to a battery with a terminal voltage of 12.0 V, (R1 = 40.0 , R2 = 80.0 , R3 = 140.0 and R4 = 15.0 ) (a) Determine the equivalent resistance for the circuit. 1 (b) Determine the current in the battery. 2 V (c) Determine the
asked by Amelia 
Math 4
A bowl contains 3 apples, 4 pears, 2 bananas, and 1 peach. Hal chooses a piece of fruit without looking. What is the probability he chooses an apple or a peach?
asked by cindy 
Art
What are the similarities and differences between scroll paintings in China and Japan?
asked by Bella 
physics
A net charge of 47 mC passes through the crosssectional area of a wire in 19.0 s. (a) What is the current in the wire? 1 A (b) How many electrons pass the crosssectional area in 1.0 min? 2 electrons
asked by Alice 
Physics
When light of wavelength 391 nm falls on a potassium surface, electrons are emitted that have a maximum kinetic energy of 1.72 eV. 1) What is the cutoﬀ wavelength of potassium? Answer in units of nm 2)What is the threshold frequency for potassium? Answer
asked by Jason 
science
Explain the concepts of phyletic gradualism and punctuated equilibrium. What predictions about the fossil record does punctuated equilibrium make? In this model, what are the processes that produce rapid evolution? Which evolutionary factors are
asked by kamelia 
Statistics
A research center claims that 50% of people believe that drivers should be allowed to use cellular phones with hands free devices while driving. In a random sample of 150 U.S. adults 58% say that drivers should be allowed to use cellular phones with hands
asked by Amber 
chem
How many grams of NaOH must be dissolved in water to make 750ml of 1.7 M solution? (molecular weight of NaOH = 4Og/mol)
asked by nero 
physics
Calculate the cost of operating a 65 W light bulb continuously for a 30day month when electrical energy costs $0.23/kW·h. $ 1 How do you calculate cost? whats the equation?
asked by Alice 
Ap physics
A steam iron draws 6.5 A when connected to a potential difference of 120 V. (a) What is the power rating of this iron? 1 W (b) How many joules of energy are produced in 20.0 min? 2 J (c) How much does it cost to run the iron for 20.0 min at $0.014/kW·h? $
asked by Amelia 
Life Orientation
What are the factors contributing to lack of physical fitness and proper nutrition in the adolescent
asked by Faith 
physics
An archer puts a 0.26kg arrow to the bowstring. An average force of 200 N is exerted to draw the string back 1.4 m. (a) Assuming no frictional loss, with what speed does the arrow leave the bow? m/s (b) If the arrow is shot straight up, how high does it
asked by Brianna 
statistics
a final exam in statistics has a mean of 73 with a standard deviation of 7.73. Assume that a random sample of 24 students is selected and the mean test score of the sample is computed. What percentage of sample means are less than 70?
asked by erica 
math (2nd Try)
You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range are reasonable for the function? These are my options: domain: 1
asked by Jane 
Math
If two number cubes are tossed, what is the probability of getting a sum that is less than 6, given that 1 number cube shows a 3 ?
asked by Ana 
genetics
A browneyed man marries a blueeyed woman and they have eight children, all with brown eyes. Can you be sure whether the man is homozygous or heterozygous for eye color?
asked by Anonymous 
geometry
the area of a parallelogram is 36 in squared and its height is 3 in . How long is the corresponding base?
asked by Hdjdhdhdhs 
physics
In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.9 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity of +3.4 m/s. The
asked by chelsea 
statistics
A construction zone on Kings Road has a posted speed of 45 kilometers per hour. The speeds of vehicle passing through this construction zone are normally distributed with a mean of 46 kilometers per hour and a standard deviation of 4 kilometers per hour.
asked by Nesa 
Statistics
In 2002, the average price of new homes in a certain suburb was $145,000. Assume that this mean is based on a random sample of 1000 new home sales and that the sample standard deviation is $24,000. Construct a 95% confidence interval for the 2002 mean
asked by Nesa 
Statistics
A random sample of 16 midsized cars tested for fuel consumption gave a mean of 26.4 kilometers per liter with a standard deviation of 2.3 kilometers per liter. i) Assuming that the kilometers per liter given by all midsized cars have a normal
asked by Nesa 
chemistry
Haber process at 127C: 1N2 + 3H2 > 2 NH3 [NH3] @ equilibrium= 0.031M [N2] @ initial =0.85 M [H2] @ initial =0.0031 M Calc Keq for the reaction. This is how I did it: 1N2 + 3H2 > 2 NH3 i:0.85 0.0031 0 c: X 3X +2X e: 0.85X 0.00313X 0.031=2X
asked by Holly 
physics
How much charge passes through a crosssectional area of a copper wire in 0.8 s if I = 3.5 A? 1 C Work equation?
asked by Alice 
Math
A sequence is called an arithmetic progression of the rst order if the di erences of the successive terms are constant. It is called an arith metic progression of the second order if the di erences of the successive terms form an arithmetic progression of
asked by Bhupendra 
Physics
Two persons A and B are walking with a speed of 4 km/h and 5 km/h respectively in the same direction. Find how far will B be from A after 3 hours ?
asked by Catherine 
physics
two objects of masses m1 and m2 fall freely from height h1 and h2 in a vertical plane respectively.The ratio of time taken by them is how much by reaching the ground?
asked by snigdha 
Ellipses Part 2:)
4x^2+y^248x4y+48=0 what is the distance from c to foci of this equation The center is (6,2) major is 10 i think and minor is 5 but they might be wrong
asked by Honey 
arithmetic
On a blueprint in which 2inches represent 5ft, the length of a room measures 7 1/2inches. The actual length of the room is
asked by Chris reed 
Art (plzzz read!)
What is Art therapy? What do you do as a art therapist? Do you get paid a lot? (curious) How does it change people lives?
asked by Laruen 
English
1. What is the name for the hat which a coook wears when he cooks? 2. He is wearing swimming goggles. 22. He is wearing swimming glasses. (Are both the same?) English  Writeacher, Thursday, May 10, 2012 at 10:46pm 1  toque 2  goggles, but not glasses
asked by rfvv 
Physics
In a computer monitor, an electron beam with a current of 4x10^6 A is directed at the screen. How many electrons are transferred to the monitor in 2 minutes.
asked by Yvonne 
physics Electromagnetic waves
A long hollow nonconducting cylinder of radius 0.060 m and length 0.70 m carries a uniform charge per unit area of 4.0 C/m^2 on its surface. Beginning from rest, an externally applied torque causes the cylinder to rotate at constant acceleration of 40
asked by Rams 
physics
A color television has a power rating of 325 W. How much current does this set draw from a potential difference of 120 V? 1 . A i got 2.42 but its wrong?
asked by Alice 
English
1. At the singing club, we meet at 9 every Saturday and sing classical songs together. We have to present somee songs before students and teachers at the school festival every year. 2. We practice singing children's songs together each Saturday. Every year
asked by rfvv 
Chemistry
25 mL of NaOH 0.16 M is added to 50 mL of 0.1 M HCl. What is the concentration of hydroxide ions in the solution?
asked by Katie 
statistics
A fair die is tossed and the number facing up is noted. If the probability of getting at least one ‘six’ is to exceed 0.9, how many times should the die be tossed.
asked by Nesa 
Writing
Can you proofread my writing? Wrong Place, Wrong Time On February 26, a 17yearold boy named Trayvon Martin was murdered. Why? Why? Why? Was George Zimmerman defending himself or committing a hate crime? I believe George Zimmerman committed a hate crime.
asked by Stonie 
Science
Table salt has a solubility of 36 g of salt in 100 g of water at 40°C. If 15 g of the salt are added to 50 g of water at the same temperature, is the resulting solution saturated or unsaturated? Explain your answer
asked by Andrew 
Spanish
"¿Conoces a mi amigo Alfredo?" "Sí, pero no ___ muy bien." a. lo conoces b. la conozco c. lo conozco d. la conoce C? "¿Se permite usar la calculadora en el examen de matematicas?" "Por suerte, sí! Debes _____!" a. explicarla b. contestarla c. hacer
asked by mysterychicken 
Chemistry
Calculate the volume of NaOH 0.5 mol/L necessary to neutralize 300 mL of HCl 0.2 M.
asked by Katie 
math
ice forms on a refrigerator ice box at the rate of (406t)g per minute after t minutes. if initially there were2g of ice, find the mass of ice formed in 5 minutes.
asked by chima 
math
in triangle abc ad is bisector of angle a and angle b is twice of angle c prove that angle bac is equal to 72
asked by priyanka 
statistics
a mean score on a standardized test is 50 with a standard deviation of 10. What are the following: 1. what scores fall between 1 and +1 standard deviation? 2. what percent of all scores fall between 1 and +1 standard deviation? 3. what score falls at +2
asked by erica 
Physics
A pair of masses are attached by a string that runs over a pulley. The larger mass is on a frictionless incline that makes an angle of 18 degree with the ground. the smaller mass is hanging in the air off the pulley. the larger mass is given an initial
asked by Jay 
science
How many moles of oxygen in a litre of air which has 21% oxygen by volume?
asked by Kanika 
Art
Describe features found in the early buildings of the International Style of architecture. Who was responsible for its start and what has it developed into?
asked by Bella 
Literature
Who did Hans Christian Andersen dedicated The Little Mermaid to?
asked by anon 
Algebra
The body mass index I can be used to determine an individuals risk for heart disease. An index less than 25 indicates low risk. the formula for body mass index is I=700w/H^. W=weight and H=height, Jeromine is 67 inches tall. What weights will keep his body
asked by Tom 
Chemistry
What mass of NaOH(s) must be added to 300 mL of HCl 0.25 M in order to completely neutralize this acid?
asked by Katie 
Math Help!
What is the probability that 3 will be spun on the spinner below? The sections in the circle are 8 sections with numbers, 1,3,2,4,2,4,2,3 My answer is 1/4 is this correct? The choices were 2, 1/4, 1/8, 3/8. I almost think to pick 2 but it doesn't seem
asked by Missy 
English
1. We sing beautiful songs together. 2. We learn classical songs and present at the school festival. 3. We sing pop songs and practice some songs so that we act on in front of teachers, students and parents at the school festival every year. (Would you
asked by rfvv 
math
Solve by Factoring 2a^2  3a = 5
asked by kayla 
aspriation
What are your future academic and career aspirations? what does this mean?
asked by bkue 
Chemistry
5.6 x 106 mol of A and 5 x 105 mol of B are mixed in a 200 mL flask. The system is represented by the equation: 2A(g) + B(g) > 3C(g) At equilibrium, there is 4.8 x 105 mol of B. Calculate the value of the equilibrium constant.
asked by Sandra 
Chemistry
A system is represented by the following equation: 2A(aq) + B(aq) > 3C(aq) At equilibrium, [C]=0.6 M. Calculate the value of K if initially 1 mol of A and 2 mol of B were placed in a 1 L flask.
asked by Sandra 
Chemistry
In the experiment of electroplating of copper, how could I remove the copper plate from my key a) Electrically? b) Chemically
asked by Chamy 
physics Electromagnetic waves
A square piece of foil with area A = 5.0 × 10^4 m^2 and mass m = 5.0 × 10^5 kg is suspended along one edge and hangs under its own weight. When light is incident perpendicular to the foil,the foil bends and reaches an equilibrium angle of 2 degrees. If
asked by Rams 
math
Solve the following polynomial inequalities. 4x  5 ≤ 2(x  7)
asked by rick 
human resources
The R&D organization has decided it wants to promote total involvement and create a learning organization. The communitybuilding meeting is the mechanism to move this forward. You have decided to bring in other consultants from the Working Better Group to
asked by Fred 
physics
Suppose we have Bob the astronaut sitting without a space suit in a spaceship full of air on a mission to Mars. Bob is very fond of balloons and is holding on to a nice, big, red helium balloon via a piece of string. Bob is sitting facing the front of the
asked by Kay 
chemistry
Given the consentration of either hrgrogen ion or hydroxide ion, use the product constant of water to calculate the consentration of the other ion at 298 K. A: [H+]=1.0x10^4M B: [OH]= 1.3x10^11M
asked by Liz 
ellipses
8x^2+y^2+80x6y+193=0 Find the center (which i think is (5,3) Find the major axis Find the minor axis && find the distance from C to foci
asked by Daniel 
math
Shela's room is 16 feet by 8 feet. If she is buying carpet squares that are 2 feet by 2 feet, how many squares does she need to purchase?
asked by EH 
ESL 33B (English)
Hi, I have a outline homework to do. The problem is I don't know a thing about this topic. The topic is about "Financial Crisis in the U.S." I spent a day on ProQuest, and I got not a hair about it. Help, I am really frustrated.
asked by Willy 
THE AGE OF JEFFERSON TO THE AMERICAN EXPANSION
Which of the following was true of the WebsterAshburton Treaty?
asked by kisha davis 
MATH PLS HELP
A research center claims that 50% of people believe that drivers should be allowed to use cellular phones with hands free devices while driving. In a random sample of 150 U.S. adults 58% say that drivers should be allowed to use cellular phones with hands
asked by Amber 
English
1. Write "Do not come in" on the star on the paper. 2. Write "Do not come in." on the star on the paper. (Do we have to add 'a full stop' after 'in' or not?)
asked by rfvv 
textile
what happened if I add ch3cooh to hypochlorite?
asked by hoor 
math
When Ms. Jackson told her students that the circumference of a circle divided by the diameter of the circle is ð, Jarrod asked how this could be true for all circles. Of the following, which provides the best basis for explaining why this is true for all
asked by joe 
History
What is the similarities and differences between Inuit art and that of the Southwestern Native Americans? So far i wrote down that.. they both use dark colors to make stuff stand out. Like, in Inuit art they use dark colors in the engraved lines, and in
asked by Maria <3 
Calculus
can someone help me find the antiderivative of: f(x)=4x times the squareroot of (1x^2)
asked by Ken 
Math
At his school’s field day, 7 of Jake’s classmates won a bronze trophy, 14 won a silver trophy, and 10 won a gold trophy. If you choose one trophy winner at random, what is the probability that you would choose someone who won a bronze trophy?
asked by Christ B 
Probability
Roberto has 10 different colored sheets of paper and 3 different colored envelopes. How many different letters can he make consisting of one colored sheet of paper and one colored envelope??? Please explain!
asked by Mack 
Math
Virginia will spin each spinner once. What is the total number of different outcomes of a color and a number that can occur? the first color wheel is three sections of red, blue and green the other circle has sections of 18. Any help would be great and if
asked by Missy 
ALGEBRA
Give the numbers of elements in the regions marked I, II, III, IV, V, VI, VII, VIII in the figure. U = 220, A = 20, B = 14, C = 12 A∩B = 2, A∩C = 2, B∩C = 6, A∩B∩C = 1  I  =  II  =  III  =  IV  =  V  =  VI  =  VII  =
asked by Monic 
Notation'
write 8,350,000 in scientific notation my answer: 8.350 X 10^3
asked by pls check 
the book animal farm
I have to put characters into groups and explain why ?
asked by mich 
math
5(2z1)4(z+9)=4(z+1) type an intriguer or a simplified fraction this is a liner equation
asked by Taffany 
Geometry
34
asked by Silandraniesha 
math
solve this 8/11+2/37/9
asked by miss c 
calculus
how to convert these into slope intercept form and graph? f(x)1/3x+5 g(x)1/3x2
asked by cass 
types of business writing
how do You suppose to start an email using a word pad i m not sure how to start it off
asked by hazel 
algebra
BreakEven Analysis: A Look at Profit and Loss: As an entrepreneur, there are going to be many decisions that you need to make, such as the price to charge your customers for your goods and services. You have just graduated from college and recently opened
asked by larry 
expressions
evaluate the expressions 2(4/7)^0 my answer 2 (8)^0 my answer 1
asked by pls check 
composition(paraphrase this paragraph)
selfservice procurement. self service business intelligence. selfservice recovery. user provisioning in private clouds. it's a wondrous world for end users today as IT departments roll out tools that hand them the reins to the data and services they
asked by maria 
chemistry
howdoimakehydrochloricacidmoreconcentrated
asked by joy 
Maths
How do yo calculate a number to the power of 2.08 i.e. not a whole number. so 4 to the power of 2.08 Thanks.
asked by Colin 
law
You are interested in buying a new car and Bob let's you borrow one of the new cars on his lot for a week to test drive. You decide you like the car and when you visit Bob to drop off the car, he hands you the following document and a pen:
asked by Anonymous 
Algebra 2
Evaluate little 9 C little 9
asked by Jason 
social health
5 ways in which human problem impacts on community.and the relavent sources to support claims.
asked by Nelly 
Calculus
which of the following integrals results from making the substitution u=x^3 in orer to find (squiggly vertical line)x^2cos(x^3)dx ~cos u du ~u^2 cos u du ~u^(2/3) cos u du1/3 os u du ~3 cos u du
asked by Ken 
Art
In my book it says that, The Navajo were using European cloth and dyes to create weavings that matched the quality of work produced on the best looms in Europe. Does that mean they were trying to imitate the works that were done in Europe?
asked by Bella 
trig
cos(πx)=
asked by Anonymous 
eng 225
i need help writing a outline for the movie blindside
asked by shelia 
Religion
Hello, for On the road to Emmaus in Luke 24: how would bias possibly played a role with the follower's. can you steer me in right direction. thanks
asked by Thomas