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Lyndsay

Questions (49)

What is the frequency range of light seenwhen you look at a black object? 1. All possible colors 2. ultra violet colors 3. no
1. 2 answers
2. 1,617 views
An excited atom emits a photon of a certainfrequency. Then two photons of this frequency fly towards the atom. Which of the
1. 0 answers
2. 590 views
Part One:The decibel level of the noise from a jet aircraft is 130 dB when measured 19.3 m from the aircraft. How much sound
1. 1 answer
2. 2,136 views
Part One:The decibel level of the noise from a jet aircraft is 130 dB when measured 19.3 m from the aircraft. How much sound
1. 8 answers
2. 939 views
Why is caffeine susceptible to analysis by reversed-phase HPLC and why couldn't it be performed by GC?
1. 0 answers
2. 875 views
I did a lab on spectrophotometric determination of iron in vitamin tablets, and I need to calculate the molarity of
1. 1 answer
2. 1,312 views
If a spectrophotometer was not zeroed before making measurements, what effect would it have on the calibration curve?
1. 1 answer
2. 497 views
What is the numerical relationship between the volume of base added to reach the first endpoint and the volume added to reach
1. 1 answer
2. 718 views
w^3 + 343/ w^11 - 49W^9 (times) w^12 -14w^11 +49w^10/ w^2-7w +49
1. 1 answer
2. 433 views
A brick is thrown upward from the top of a building at an angle of 19.3◦ above the horizontal and with an initial speed of
1. 4 answers
2. 666 views
When an objects acceleration is 0 at an instant t in time, its velocity is1. zero at t. 2. negative at t. 3. positive at t. 4.
1. 1 answer
2. 405 views
A 905 kg test car travels around a 3.34 km circular track. If the magnitude of the force that maintains the car’s circular
1. 3 answers
2. 919 views
In the 1940’s, Avery, MacCleod, and McCarty transformed nonencapsulated bacteria into encapsulated forms by growing the
1. 1 answer
2. 2,463 views
A horse of mass 187 kg pulls a cart of mass 200 kg. The acceleration of gravity is 9.8 m/s2 . What is the largest acceleration
1. 1 answer
2. 2,032 views
A block is released from rest on an inclined plane and moves 3.2 m during the next 3.9 s. The acceleration of gravity is 9.8
1. 5 answers
2. 5,194 views
Using the following bond energies, calculate the molar heat of hydrogenation, ΔHhydrogenation, for the conversion of C2H2 to
1. 1 answer
2. 3,913 views
Glycolysis produces ATP through what process?
1. 1 answer
2. 917 views
Glycolysis produces ATP through what process?
1. 0 answers
2. 582 views
The formation of tetrafluoroethylene from its elements is highly exothermic:2F2(g) + 2C(s) <-> F2C=C2F(g) b) Rare bacteria from
1. 1 answer
2. 1,365 views
A - A girl delivering newspapers covers her route by traveling 4 blocks west, 2 blocks north, then 6 blocks east. What is her
1. 2 answers
2. 1,530 views
Conclusions about the best indicator to use- Consider the pKa of indicator in relation to equivalence point of reaction, ease of
1. 1 answer
2. 637 views
The price of a popular soft drink is $0.980 for 24.0 oz (ounces) or $0.780 for 0.500 L. 1 qt = 32.0 oz. What is the price per
1. 1 answer
2. 3,949 views
A dye has a λmax = 460 nm (ε = 70,000 L/(mol*cm)). What is the concentration of dye in a sample whose absorbance at 460 nm is
1. 1 answer
2. 511 views
Calculate the concentration of a solution prepared by adding 15.00 mL of 2.10 X 10^-3 M KMnO4 from a buret into a 50.00 mL
1. 1 answer
2. 535 views
Phosphoric acid, H3PO4, has some important applications. It can be used to produce fertilizers and it is present in soft drinks.
1. 2 answers
2. 750 views
Potassium perchlorate decomposes as follows: KClO4 (s) --> KCl (s) + 2 O2 (g)If 269 mL of wet O2 (g) is collected over water at
1. 3 answers
2. 617 views
Potassium perchlorate decomposes as follows: KClO4 (s) --> KCl (s) + 2 O2 (g)If 269 mL of wet O2 (g) is collected over water at
1. 1 answer
2. 616 views
What volume of N2O (s) will be generated if 3.13 g of NH4NO3 (s) decomposes at 1.00 atm and 50 degrees celsius, given the
1. 1 answer
2. 644 views
Why doesn't acetylation occur twice on the same ring?Please help, I have no idea.
1. 2 answers
2. 636 views
In a rectangular coordinate system, a positive point charge 5.0 nC is placed at the point x=0, y=2.0 cm, and a negative point
1. 0 answers
2. 983 views
draw the product of di-acetylation of biphenyl. Explain why acetylation does not occur twice on the same ring.I have no idea how
1. 1 answer
2. 730 views
Consider compounds trans-4-tert-butylcyclohexanol and 4-tert-butylcyclohexanone below. Using silica gel TLC plates, which of
1. 4 answers
2. 2,233 views
Based on chemical structures, explain why acetophenone is only separated at the end by distillation.The mixture was acetophenone
1. 0 answers
2. 766 views
Explain why the formation of one geometric isomer is favored over the other?
1. 0 answers
2. 672 views
find the point on the plane 5x+4y+z=12 that is nearest to (2,0,1)
1. 1 answer
2. 578 views
What is the value for Kb for the formate anion, HCOO-? Ka(C7H5O2)=2.1x10^-4.
1. 1 answer
2. 4,017 views
Compute the curvature.r(t)=(t^2,2t^3/3) t >0 The answer is 1/2t(1+t^2)^3/2 I have tried multiple times but i cannot arrive to
1. 1 answer
2. 389 views
If all of the SCN- was not converted completely converted to FeNCS^2+ when the calibration curve was prepared, would this raise
1. 1 answer
2. 6,929 views
Use your understanding of natural selection to describe how the following trait might have evolved:Plants have pores on the
1. 1 answer
2. 672 views
What is the pressure of 1.78 g of nitrogen gas confined to a volume of .118 L and 25 degrees Celsius?
1. 2 answers
2. 3,618 views
Write the molecular,complete ionic, and net ionic equations for the reactions that occur, if any, when solutions of the
1. 3 answers
2. 1,499 views
How many oxygen atoms are in 3.90 g of quartz?
1. 0 answers
2. 1,039 views
I am solving a problem and have -cos(a)=-1/2. How do I solve for a?
1. 1 answer
2. 383 views
Find the area of the shaded region, bounded by the parabola 16y=5x^2+16 and the lines y=0, y=6, and x=5.I broke the figure up
1. 1 answer
2. 868 views
If y= (e^x-e^-x)/(e^x+e^-x), then y'=I took the derivative and got: y'=(e^x+e^-x)(e^x+e^-x)-(e^x-e^-x)(e^x-e^-x)/(e^x+e^-x)^2 I
1. 1 answer
2. 423 views
What is one specific example of why a person would be summoned to the Erie County Supreme Court?I know that the Erie County
1. 1 answer
2. 522 views
Introduction to Hypothesis TestingIn an article entitled “Science and ethics in conducting, analyzing, and reporting
1. 2 answers
2. 677 views
Dorothy and Rosanne are baking cookies for a party. Working alone, Rosanne can finish the cookies in 6 hours. Dorothy can finish
1. 21 answers
2. 6,483 views
I need a little help with an analogy for Nephrogenic diabetes insipidus. I'm not sure excatly how to make an analogy for that. i
1. 1 answer
2. 600 views

Answers (14)

5. all visible colors 6. No possible colors
yes, the quest does not care about significant figures
When I plug in the answers to that equation and do the work the quest says thats incorrect
It says this is incorrect
I am unsure how to solve for V when given the circumference instead of the radius.
Can someone please walk me through what equation I need to use to do this?
I tried this problem with a=2(l)/t^2, a=2(3.2)/3.95^2 = 0.41019 and the answer is not correct and I am not sure what is wrong with it or how to do it.
I figured that out but I need help with this one: How many moles of P4 would be required to produce the number of moles of H3PO4 determined from the question above which the answer is 2.34 for above.
How would you know which one is the polar solute?
yes it is a polar solvent
nevermind i figured them out
this was not very helpful but thanx anyways.
Things don't get fixed over night. Sounds like some people need to get a little more patience. Obama is doing a fine job.
Things down get fixed over night. Sounds like some people need to get a little more patience. Obama is doing a fine job.

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