Monday
December 22, 2014

Posts by Anna


Total # Posts: 2,061

chemistry
i figured out part C as well t1/2 = 1/K(A) t1/2 = 1/(0.04)x(0.02) t1/2 = 1/8x10^-4 t1/2 = 1250sec t1/2 = 1250s/60m half life = 20.833min Still do not know how to set up part B. Can anybody help out?
April 22, 2010

chemistry
Need some help. have the A part of the question but do not know how to set B or C. Butadiene (C4H6) reacts with itself to form a dimer with the formula C8H12. The reaction is second order in butadiene. If the rate constant at a particular temp is 0.04/(M s) and the initial ...
April 22, 2010

Social Studies
Can you please explain how trade affected the power of kings during the 1500s and the 1600? Thanx
April 22, 2010

5th grade
name at least two suspensions
April 20, 2010

12th grade agebra 2
find all real roots: x^4-6x^2+8=0 and the other polynomial is: 8x^3+1=0
April 20, 2010

algebra 2
any body? need help a.s.a.p
April 19, 2010

algebra 2
find all rational roots of the polynomial 6x^3-13x^2-41x-12=0
April 19, 2010

Algebra
t=5
April 19, 2010

i need some tips
i worked hard this year thank you all for your help ;)
April 16, 2010

i need some tips
but my teachers didn't tell me anything to study oh and btw is there anything online that has similar test questions and is there any tips that would help me on the test **i am in the 7th grade**
April 16, 2010

i need some tips
okay so now i have this test called tcap and there is A LOT to study and i only have 2 days to study i need help do u have any tips that would help me study or help me ON my tcap test please respond i need as many people to respond because i really need help thank you
April 16, 2010

science
THANK YOU MS. SUE ,YOU ARE ALWAYS ANSWERING MY QUESTIONS :)
April 16, 2010

science
i need to make a gold rube berg simple machine(i think that is what it is called) and i need some ideas and some tips THANK YOU
April 16, 2010

language
victory-victories multiply-multiplies tiny-don't know thirsty-thirstness? justify-justified pray-prays or prayed dry-dryness anniversary-anniversaries? body-bodies rainy-not really sure comedy-comedies crazy-crazyness industry-industries decay-decayed? heavy-heaviness ...
April 15, 2010

language
you take away the y and add an i and then add es and i am sorry :(
April 15, 2010

language
yeah because there is a lot of questions but luckily i am almost done :)
April 15, 2010

language
victory-victories baby-babies country-countries multiply-don't understant enemy-enemies marry-married highway-highways tiny-don't understant thirsty-thirstiness? carry-carries family-familys justify-justifies pray-prayed vary-varies dry-dryness anniversary-...
April 15, 2010

science help please
i don't understant what sexual reproduction is and what asexual reproduction is could please help me understand
April 15, 2010

chemistry
The reaction SO2 + 1/2O2 -->SO3 has kp equal to 6.55 at 627C. what is the value of kc at this temperature? how do you set this up?
April 14, 2010

Chemistry-check my work
great thanks
April 14, 2010

Chemistry-check my work
The equilibrium constant kc for the equation CS2 + 4H2 <--> CH4 +2H2S at 900 C is 27.8. what is the value of kc for the following equation? 1/2CS2 + 2H2 <---> 1/2CH4 +H2S sqr root of 278=5.27?
April 14, 2010

chemistry check my work
sorry new to typing in math or chem problems so i dont really understand the first part of your answer. but is [NO][H]over[N][H2O] right or did i mess up somewhere
April 14, 2010

chemistry check my work
the equilibrium-constant expression for a reaction is kc= [N2][H2O]2 ---------- [NO]2[H2] what is the equilibrium-constant expression when the equation for this reaction is halved and then reversed? 2NO + 2H2 --> N2 + 2H2O NO + H2 ---> N + H2O N + H2O --> NO + H [NO][...
April 14, 2010

math please check my work
a license plate has 2 letters followed by 4 digits.how many license plates are possible if the digits and letters can be repeated? f-8 g-92 h-676000 i-6760000 i think it is i(the 4th one) am i correct thank you for helping me
April 14, 2010

math check my work
but these r the only choices a-8 b-92 c-676000 or d-6760000 so what would it be
April 14, 2010

math check my work
but these are the only answers and there is 26 letters in the alphabet
April 14, 2010

math check my work
a license plate has 2 letters followed by 4 digits.how many license plates are possible if the digits and letters can be repeated? f-8 g-92 h-676000 i-6760000 i think it is i am i correct thank you for helping me
April 14, 2010

ms. sue
i am sorry ms. sue i still don't get it could you please give me an explanation for 'dummies' thank you
April 14, 2010

ms. sue please check
can it be c
April 14, 2010

language could you please check my work
answers are on the bottom 1)A person's hobby a.can be physical recreation b.can be mental recreation c.both a and b 2)A good hobby is is a.exciting b.satisfying c.both a and b 3)Some hobbies are a.lifelong b. given up for something more interesting c. both a and b 4)...
April 14, 2010

language please check my work
In 2000 an experimental robot performed operations on the damaged valves of ten patient's hearts. in this true: -robot is a noun -performed is a verb -damaged is a noun
April 14, 2010

Chem
The equilibrium constant kc for the reaction N2(g)+ 3H(g)---2NH3(g) at 450C is 0.159. Calculate the equilibrium composition when 1.00 mol N2 is mixed with 3.00 mol H2 in a 2.00-L vessel. need help setting up the problem
April 14, 2010

reading/language
which of the following is a word? a)croad b)cread c)craid d)creed thank you
April 13, 2010

English
Hi;-) 1)--I would put what it is. Ex. The main themes of Shakespeare's play; "The Tempest", are forgiveness, reconcilation....... 2)Are you referring to the play? The play ends in peace with music intensifying the atmosphere 3)Yeah, it works out 4)The most ...
April 12, 2010

social studies
If -then clauses If an air mass originates over an ocean.... if an air mass originates over an continent... If a large body of water is cooler than the land next to it... If a large body of water is warmer than the land next to it...
April 11, 2010

English
They all see to be fine, however you have a lot of spelling errors. Im not accurately sure of the second one.
April 9, 2010

exciting school!
16a/4 (divided by 4) how would u do this?
April 7, 2010

physics
Dirk pushes on a packing box with a horizontal force of 67.0 N as he slides it along the floor. The average friction force acting on the box is 3.00 N. How much total work is done on the box in moving it 3.10 m along the floor?
April 4, 2010

physics
how do i go about in solving this? Sean climbs a tower that is 84.6 m high to make a jump with a parachute. The mass of Sean plus the parachute is 66.8 kg. If U = 0 at ground level, what is the potential energy of Sean and the parachute at the top of the tower?
April 4, 2010

Physics
Two infinitely long slits, S1 and S2, each of width d=0.1 cm are used to prepare a box-shaped electron beam with energy E=400 eV. At what distance x from the slit S2 will the thickness of this electron beam double due to Coulomb's repulsion? The linear density of electron ...
April 4, 2010

Chemistry
Why do we put a minus sing in front of the bond enthalpies of the bonds that are being formed? And why are the enthalpies of formation negative in general? I also don't understand why we subtract the enthalpy of formation of the reactants from the enthalpy of formation of ...
April 3, 2010

science i don't get it
Where is constructive interference in a standing wave?
April 2, 2010

physics
A harpsichord string of length 1.60 m and linear mass density 25.0 mg/m vibrates at a (fundamental) frequency of 450.0 Hz. (a) What is the speed of the transverse string waves in m? (b) What is the tension in N? (c) What are the wavelength and frequency of the sound wave in ...
March 31, 2010

physics help
Michelle is enjoying a picnic across the valley from a cliff. She is playing music on her radio (assume it to be an isotropic source) and notices an echo from the cliff. She claps her hands and the echo takes 2.6 s to return. (a) Given that the speed of sound in air is 343 m/s...
March 31, 2010

Elementary math College
A bag contains 7 red chips and 9 blue chips. Two chips are selected randomly without replacement from the bag. What is the probability that the two chips are the same color?
March 30, 2010

Math
what are the steps on how to balance Al + O2 -----> Al2O3
March 28, 2010

math
its two i'm looking for it to equal 10
March 25, 2010

social studies
how did mountains both help and hurt ancient greece ?
March 25, 2010

English
Are these two sentences good: The hall of mirrors gave me a confound feeling. Confound- to throw into confusion or perplexity I told my mom that i was going to the movies but, she gave me one circumstance and that was to call her when i get there. Circumstance-a condition, ...
March 23, 2010

English
Thank You :)
March 23, 2010

English
What are good sentences using the words: frivolous, coy and conceive Frivolous- of little weight or importance; having no sound bases Coy- shrinking from contact or familiarity Conceive- to take into ones mind Using these definitions, can you come up with three sentences for ...
March 23, 2010

Science
what is the electron arrangement for boron? and how do you find the valence electron for it? i know it has 3 v.e. but how do you find it
March 17, 2010

Science
Im doing this element project and my element is boron. i need to theme my poster with whatever element i get. example: for helium you can draw balloons on your poster... ive got no ideas for boron. help please.. something creative THnks
March 16, 2010

Science
im doing this project on boron and one fact says that if we didnt have boron we would die, but why is that? .. plz gimme detailed explanation .. thx
March 16, 2010

Economics
Pls help me to sole micro problem.Production function is Y=K^0.5L^0.5 and w=$1 (wage) and r=$2 (rent) P=$5 I need to find the long term optimum amount for K and L. Also long term optimun output and a cost function. Thank you.
March 13, 2010

chemistry
A chemist has 12.0 M HBr and would like to use it to make 500.0 mL of 3.5 M HBr. describe how she should do this
March 11, 2010

geo
thank you :)
March 6, 2010

geo
i was looking for the absolute location... so it is 35 degrees North and 105 degrees East?
March 6, 2010

geo
that isn't the absolute location. is it??
March 6, 2010

geo
what is china's absolute location??
March 6, 2010

Chemistry
What are induced dipoles?
March 4, 2010

Tcp
In the second segment sent from Host A to B, what are the sequence number, source port number and destination port number
March 2, 2010

math
Write a linear equation to model the situation. Use unit analysis to check your model. You borrow $40 from your sister. To repay the loan, you pay her $5 a week.
March 2, 2010

spanish
can somebody put the following spanish words into correct simple spanish sentences. One each. Detras de-behing Delante de-front Debajo de-underneath sobre/en-on encima de-over/on al lado de-side/next lejos de-far from cerca de-near dentro de-inside duera de-outside
March 2, 2010

Chemistry
Awesome. Thanks!
February 28, 2010

Chemistry
A student heats 5.128g of the sodium carbonate/sodium bicarbonate mixture to a constant mass of 4.256g. Determine the mass of sodium bicarbonate present in the mixture.
February 28, 2010

Accounting
what is the best formula to use? do I add the operating revenues to expenses.?/ please help thank you
February 25, 2010

Accounting
It says in the textbook total margin, the ratio of profit to the sum of revenues and non-operating gains... I'm confused...
February 25, 2010

Accounting
how do I calculate total margin?
February 25, 2010

Accounting/Financing
I am so weak at this new class I started no matter how many times I read my textbook, I cannot understand how to calculate ratios can someone please show me or guide me how to work these problems, I would really appreciate it, thank you please help me.. Compute the following ...
February 25, 2010

Accounting/Financing
I am so weak at this new class I started no matter how many times I read my textbook, I cannot understand how to calculate ratios can someone please show me or guide me how to work these problems, I would really appreciate it, thank you please help me.. Compute the following ...
February 25, 2010

geo
what are china's major imports and exports?
February 21, 2010

geography
is there a chart or information showing where these people immigrate/migrate the most?
February 21, 2010

geography
immigration and emigration patterns of china
February 21, 2010

Financing and Accounting
can someone please show me an easy formula for these problems?
February 18, 2010

Financing and Accounting
How would I find the formula for these problems? Please help me.. I would really appreciate it.. thank you Calculate the present value of the following: $7,000 in 5 years at an annual discount rate of 6% $7,000 in 5 years at a semiannual discount rate of 6% $7,000 in 5 years ...
February 18, 2010

Accounting
How would I find the formula for these problems? Please help me.. I would really appreciate it.. thank you Calculate the present value of the following: $7,000 in 5 years at an annual discount rate of 6% $7,000 in 5 years at a semiannual discount rate of 6% $7,000 in 5 years ...
February 18, 2010

Finances
Assume that you have two contracts to choose from: Contract A pays $5,000 per year for 5 years starting one year from today. Contract B pays $5,000 per year for 5 years starting today. The discount rate for each is 6%. Which annuity contract would you choose for your ...
February 18, 2010

Finances and Math
How did you get 1.015?
February 18, 2010

Finances and Math
Thank you Reiny
February 18, 2010

Finances and Math
Can someone please help me solve these problems or help me find an easy formula?..No matter how many times I read or try calculating I can't get it please help me..I would really appreciate it thank you.. Calculate the future value of the following: $5,000 compounded ...
February 18, 2010

algebra
Show a complete algebraic solution for the following: find 4 consecutive multiples of 11 with the sum of 2178
February 17, 2010

geo
what are china's major imports and exports?
February 13, 2010

geo
oh, ok thank you!!
February 13, 2010

geo
would it be under economy?
February 13, 2010

geo
china's political information
February 13, 2010

geo
china's immigration and emigration patterns
February 13, 2010

geo
can you please list some sites that would help me get the answer?
February 13, 2010

geo
china's immigration and emigration patterns
February 13, 2010

geo
what is china's population density patterns ?
February 13, 2010

geo
i meant the population density patterns
February 13, 2010

geo
umm, do you happen to know the patterns?
February 13, 2010

geo
ok. thank you ms.sue :)
February 13, 2010

geo
what is china's population density?
February 13, 2010

geo
thanks alot!
February 13, 2010

geo
what are the human characteristics in china?
February 13, 2010

geo
thanks
February 13, 2010

geo
can you give me some on china?
February 13, 2010

geo
what are the human characteristics in china?
February 13, 2010

geo
thanks for helping me
February 12, 2010

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