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Laura

Questions (719)

A flock of geese is flying while another goose is flying past it. The goose asks the leader of the flock how many they are. The
1. 1 answer
2. 512 views
What are some examples of competitive advantages Korea possesses?I've tried searching, but didn't really find anything
1. 0 answers
2. 363 views
Help needed on a homework problem -solution of HCN and CN- , Ka 6.2x10^-10 . Is this a buffered solution? Shouldn't the pH be
1. 1 answer
2. 567 views
At an altitude of 50.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air
1. 0 answers
2. 516 views
Calculate the mass percent of methanol, ethanol, and MTBE (answers must be received in that order) that must be present in
1. 0 answers
2. 427 views
What is the fraction of NTA present after HT2- has been brought to equilibrium with solid PbCO3 at pH 7.00, in a medium in which
1. 0 answers
2. 518 views
At an altitude of 50.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air
1. 1 answer
2. 461 views
What is the calculated value of the partial pressure (atm) of O2 in acid mine water of pH 2.500, in which [Fe3+] = [Fe2+]?
1. 1 answer
2. 425 views
A stoppered flask at 25 C contains 250 mL water, 200 mL octanol, and 50 mL of air. An unknown mass of o-xylene is added to the
1. 2 answers
2. 1,441 views
The half-life of tritium is approximately 12 years. What will be the molar ratio of tritium to helium-3 in a sealed sampel after
1. 1 answer
2. 615 views
In manufacturing a fruit drink, citric acid is added to water in the amount of 0.1 mol/L. What is the pH of the resulting
1. 1 answer
2. 559 views
An analytical chemist determines that an estuarine water sample contains 1.5 g/L of sulfate ion. What is the concentration in
1. 1 answer
2. 1,007 views
a) Photosynthesis is estimated to produce 360.0 g (dry weight) of plant matter per square meter, 50% of which is carbon.
1. 1 answer
2. 867 views
How much Fe++ could be present in water containing 1 x 1e-02 M HCO3- (bicarbonate) without causing the precipitation of FeCO3
1. 1 answer
2. 519 views
Taking the mass of the atmosphere to be 4.6E15 metric tons, what mass of carbon must be burned in order to increase the average
1. 0 answers
2. 494 views
Calculate the concentration of SO2(ppm) that must be reached in polluted air (in ppm) if the dissolved gas is to produce a pH of
1. 0 answers
2. 458 views
Hello, I was considering to drop economics since i find it useless. My friends and my parents say its an easy subject and that
1. 1 answer
2. 522 views
John wants a $200,000 house. He is 40 and he retires at 65. He believes he earns 9% annually after taxes. How much must John
1. 1 answer
2. 522 views
Could you check these thanksDirections: Vrai or faux? Part 1 1. Aux Etats-Unis chaque municipalité a son bureau de poste.
1. 2 answers
2. 661 views
Bernstein writes that today, "debates about immigration often included the claim that 'my relatives came the legal way,' Hom's
1. 3 answers
2. 462 views
A cereal company finds that the number of people who will buy one of its products in the first month that it is introduced is
1. 2 answers
2. 2,663 views
hi I am having trouble with this question Why is it important to adjust the shelves to the correct position before lighting the
1. 1 answer
2. 401 views
When Dr. Farrell was a graduate student, he prepared a buffer of pH = 8.0 from Sodium Acetate. Why would the casual observer to
1. 1 answer
2. 499 views
What detector is used to pick up the x-rays in hospitals?
1. 1 answer
2. 376 views
PLEASE HELP - NOBODY ANSWERED MY QUESTION YESTERDAY.sue drives her 1452 kg car along a straight road at a constant velocity of
1. 2 answers
2. 587 views
sue drives her 1452 kg car along a straight road at a constant velocity of 30 m/s [E]. Ger brakes suddently give out. she puts
1. 0 answers
2. 554 views
(-11)(-6)/(-3)+15/(-5)-2
1. 1 answer
2. 228 views
Decrease a number by 5, divide the result by 2, then add 17 and multiply by 5. If the final result is 100, with what number did
1. 1 answer
2. 638 views
Of all U.S. fourth graders, 71% are assigned mathematics homework three or more times per week. If 5 fouth graders are randomly
1. 2 answers
2. 2,029 views
Can you please tell me what this means? Thank you.humans come and go in the continuous transformation of the universe. Indeed,
1. 2 answers
2. 463 views
why do religions that have common geographic origins tend to share common code of behavior and views of the nature and reason
1. 1 answer
2. 479 views
Multiply or divide to find an equivalent fraction: 11/22
1. 1 answer
2. 522 views
Solve for x:-(4x+4)/5= (5x-1)/2 - x/3
1. 1 answer
2. 391 views
Can someone explain 'simply' what Particle theory and Brownian motion are.I'm finding alot of websites hard to understand.
1. 1 answer
2. 570 views
prove:(cscx-cotx)^4 x (cscx+cotx)^4 = 1
1. 1 answer
2. 1,212 views
prove:(cscx-cotx)^4 x (cscx+cotx)^4 = 1
1. 0 answers
2. 1,019 views
how do i do i do y=cos(radt)+ rad(cost)?---- f(x) = (3x^2) (csc4x)^4 // f'(x)=? my notes say : f'(x) =
1. 0 answers
2. 435 views
y = sec(5x) / x^2my notes say y' = 5x^2sec5xtan5x-2xsec5x i get y'= sec5x(-2x^-3)+sec5xtan5x(5)(x^-2) when i change it to
1. 1 answer
2. 435 views
f(x) = (3x^2) (csc4x)^4 // f'(x)=?my notes say : f'(x) = (3x^2)5(csc4x)^4(-csc(4x)(tan4x)(4)+(csc4x)^5(6) I redid it and i got :
1. 0 answers
2. 431 views
In a sentence or two can you please tell me what Marbury vs. Madison was?
1. 1 answer
2. 462 views
I can't decide on an event that would have been a rational decision at one time but now is considered to be an irrational
1. 2 answers
2. 404 views
Arrays and an expanded algorithm:23 x 17
1. 17 answers
2. 907 views
Suggest two tips for creating academic documents not mentioned in the resource information.
1. 5 answers
2. 476 views
if 5.00g magnesium is combined with 10.0 g of chlorine, show by calculation which substance is the limiting reactant and
1. 3 answers
2. 4,490 views
Jules Verne in 1865 proposede sending men to the moon by firing a space capsule from a 220-m-long cannon with final velocity of
1. 1 answer
2. 450 views
The sides of a triangle are in the ratio 5:12:13. What is the length of each side of the triangle if the perimeter of the
1. 1 answer
2. 1,177 views
A random sample of 10 observations has been drawn from a normal population, and the sample variance is found to be s² = 19.5.
1. 2 answers
2. 1,108 views
For three independent samples, each with n= 100, the respective sample proportions are 0.30, 0.35, and 0.25. Use the 0.05 level
1. 1 answer
2. 1,123 views
How did human history in North Americadiffer from the events of Asia, Eurasia, and Europe before the international state of
1. 1 answer
2. 509 views
A letter was left off in my previous question, changing the meaning.What is the TONE of ee cummings Anyone lived in a pretty how
1. 0 answers
2. 399 views
What is the one of e.e. cumings poems ' anyone lived in a pretty how town' and 'old age sticks'? Where is the satire? To me,
1. 2 answers
2. 553 views
how can we prove that an exterior angle of a triangle has measure equal to the sum of the measures of the 2 interior angles
1. 4 answers
2. 3,126 views
A student's correctly calculated value for the percent recovery of the purified unknown solid in a recrystallization experiment
1. 2 answers
2. 636 views
prove triangular inequality: if P,Q, and R are not collinear, then PQ + QR is greater than PR.
1. 1 answer
2. 471 views
I need to know the difference between rhythm, beat and pitch in the song Amazing Grace
1. 2 answers
2. 495 views
4-methyl-2-pentyne show tautomerization ? i know tautomerization is done with a double bond but this one has a triple bond
1. 1 answer
2. 388 views
4-methyl-2-pentyne show tautomerization
1. 0 answers
2. 506 views
what's the derivative of cos3x
1. 1 answer
2. 456 views
what is derivative of (1-2x)^-1?is it -1/(1-2x)^2 ?
1. 0 answers
2. 301 views
i have a french exam tomorrow and i cant remember nothing, i've looked through my book like a million times and i just forget it
1. 10 answers
2. 901 views
how do you find the limit as n approaches infinity of n/(2^n + n)?
1. 1 answer
2. 493 views
how do you take a limit of [ln(1+e^n)]/2n as n goes to infinity?
1. 1 answer
2. 872 views
determine if this converges and methods used to find its covergence or divergence.The series as n = 1 to infinity of
1. 0 answers
2. 374 views
when eggs in a basket are removed 2,3,4,5,6 at a time there remain, respectively, 1,2,3,4,5 eggs. when they are taken out 7 at a
1. 4 answers
2. 2,923 views
what is the remainder when the sum 1^5+2^5+3^5+...99^5+100^5 is divided by 4? again a mod problem that I don't know how to work.
1. 3 answers
2. 2,307 views
find remainders when 2^50 and 41^65 are divided by 7. this is a mod problem but I don't know how to work it...
1. 1 answer
2. 944 views
How do you prove that any palindrome, a number that reads the same backwards and forwards, with an even number of digits is
1. 1 answer
2. 630 views
How might you go about proving that N-M is divisible by 9 when N represents an integer (such as 6923) and M represents that
1. 1 answer
2. 617 views
give an example to show that a^2 congruent to b^2 mod n need not imply that a congruent to b mod n.
1. 2 answers
2. 1,476 views
I need to write an ecological profile for an animal. What exactly is an ecological profile? What does it include? Since I am not
1. 0 answers
2. 666 views
how would you find all prime numbers that divide 50! (factorial)?
1. 1 answer
2. 687 views
what are the four quantum numbers of the last electron of Asthis is what i have n=4 l=1 ms= 1/2 i don't know how to calculate
1. 3 answers
2. 1,069 views
what's the limit as n goes to infinity of (2 + 4/n^2)^(1/3)
1. 2 answers
2. 317 views
what is the derivative of 4(x^2-1)^-1/2
1. 1 answer
2. 278 views
What is the difference between an inelastic and an elastic collision?What does kinetic energy have to do with all of this? Give
1. 1 answer
2. 547 views
find the integral of x^2 e^-xdx with the limits of negative infinity to zero.so far, I have, lim as t approaches negative
1. 1 answer
2. 465 views
Prove: there exists x and y for c=ax+by iff gcd(a,b)/c.
1. 1 answer
2. 456 views
Prove: 3/ a(2a^2 + 7)
1. 14 answers
2. 3,400 views
Hi guys,I thought it would be due to aromaticity breaking difficulty? In the bromination reaction, why are the double bonds
1. 2 answers
2. 472 views
How does this statement go: A slim to none chance or a slim to nothing chace
1. 1 answer
2. 360 views
Using L'Hospital's Rule,find, the limit as x approaches 0 of x^(sinx)
1. 1 answer
2. 598 views
Using L'Hospital's Rule, find,the limit as x approaches 0 of x^(sinx) thank you in advance to any help.
1. 0 answers
2. 452 views
how do you take the derivative of e^(x^2)?
1. 1 answer
2. 372 views
Using L'Hospital's rule:find, lim as x approaches (-) infinity of xsin(1/x)
1. 1 answer
2. 547 views
How is elasticity of supply related to elasticity of demand? Is this correct?I know that the terms supply and demand refer to
1. 1 answer
2. 1,301 views
1. The president of the United States is elected by the electoral college. What type of system is this?2. In ancient Athens
1. 2 answers
2. 787 views
What is the difference between an amino acid and a protein?How does this difference in structure affect biological function?
1. 1 answer
2. 1,027 views
State two differences between DNA and RNA.
1. 2 answers
2. 417 views
Give an example of a disaccharide
1. 1 answer
2. 939 views
The question is with a lab that I have already done. Here are my numbersmoles of malachite in 1g 221.12 moles of CuO produced
1. 0 answers
2. 734 views
I need to write a balanced equation for this problem and am having difficulty doing so.The question is this: use the mole ratio
1. 2 answers
2. 700 views
I need to write a balanced equation for this problem and am having difficulty doing so.The question is this: use the mole ratio
1. 1 answer
2. 589 views
Why do carboxylic acids generally have higher melting and boiling points than alcohols, ketones, and aldehydes of comparable
1. 2 answers
2. 1,144 views
Explain why alcohols of lower molecular weight are generally soluble in water but those of higher molecular weights are
1. 1 answer
2. 659 views
How do you prove: If a/b, then a/bcSo far I have: Since a/b, then b=ac where c is an integer. Now where do i go?
1. 0 answers
2. 384 views
What are amine salts?
1. 1 answer
2. 422 views
An alcohol has an OH functionally in it. Do you expect it to be a base? Why, or why not?
1. 1 answer
2. 368 views
How does the government participates in a mixed economy?Based on principles of the free market, allowing some government
1. 2 answers
2. 935 views
how do you integrate (cos^2 x)^4
1. 0 answers
2. 268 views
is the integral of 1/x^2, 2x ln of the absolute value of x^2?
1. 3 answers
2. 309 views

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