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Questions (16)
I can't get the right answer, where am I going wrong?
7.0x10^9= (6.7x10^9)(2.72^r*3) 1.04 = 2.72^r*3 When I solve for this, I get
4 answers
511 views
A beam of yellow laser light (590 nm) passes through a circular aperture of diameter 5.0 mm. What is the angular width of the
2 answers
489 views
A beam of yellow laser light (590 nm) passes through a circular aperture of diameter 5.0 mm. What is the angular width of the
3 answers
692 views
An old refracting telescope in a museum is 44.0 cm long and the caption states that the telescope magnifies images by a factor
2 answers
575 views
A uniform magnetic field points north; its magnitude is 3.5 T. A proton with kinetic energy 6.0 × 10-13 J is moving vertically
0 answers
523 views
A uniform magnetic field points north; its magnitude is 3.5 T. A proton with kinetic energy 6.0 × 10-13 J is moving vertically
0 answers
587 views
At 100 degrees C , a certain substance undergoes second-order decomposition with a half-life of 26 minutes.
If the initial
2 answers
502 views
If 49 m of nichrome wire is to have a resistance of 13.0 ohms at 20°C, what diameter wire should be used?
I've done this:
3 answers
1,436 views
What is the boiling point (in degrees Celsius ) of each of the solutions below? For water, Kb = 0.51 (Degrees C * kg)/mol The
0 answers
911 views
Acetone, C3H6O, and ethyl acetate, C4H8O2, are organic liquids often used as solvents. At 30 degrees C, the vapor pressure of
2 answers
2,670 views
If 0.380 mol of a nonvolatile nonelectrolyte are dissolved in 3.00 mol of water, what is the vapor pressure P(H2O) of the
2 answers
4,791 views
If 0.380 mol of a nonvolatile nonelectrolyte are dissolved in 3.00 mol of water, what is the vapor pressure P(H2O) of the
1 answer
860 views
How can i rearrange this Clausius-Clapeyron equation so that 1/T2 is on one side?
In P2/P1=delta H vaporization/R (1/T2- 1/T1) I
2 answers
3,397 views
As shown in the figure, a square has sides of 8.0 cm with a charge of +6.0 µC at one corner (a) and with charges of -2.0 µC at
2 answers
861 views
A planet has two satellite moons. Moon X has an orbital period of 2.27 days. Moon Y has an orbital period of about 3.40 days.
1 answer
726 views
which of these substances dissolve in water? and are they elements or compounds?
copper nitrate sodium hydroxide copper hydroxide
1 answer
1,228 views
Answers (16)
14
Bob, thank you. I thought I was going insane there for a minute. I guess the professor made a mistake. We are all human (but it drives me crazy when I'm trying to study haha)
No. The math he did was handwritten. I guess he must have made a mistake because this is driving me nuts. Everything listed in my post is CORRECTLY copied from the piece of paper I got it on.
Well, that was a step my teacher did so I just followed it. However, .00082 degrees is not the correct answer either (or the variant of 8.2e-4). So I am just totally lost on this one. :/
The causes of Sand Creek massacre were rooted in the decades-long conflict for control of the Great Plains of eastern Colorado. The Fort Laramie Treaty of 1851 guaranteed ownership of the area north of the Arkansas River to the Nebraska border to the
I have also tried using the positive of the angular width. But that is wrong, too. I used the same equation as i did above but with the 1.22
I just tried the problem with 1.22 and i got -1.21 as my final angular width. However, this is also incorrect. any ideas where I am going wrong?
Actually, those answers are incorrect.
You are most correct, I did not. Thank you so much.
2.27mm is the new answer I got, which is correct. Thanks for pointing that out, Bob. I was going insane trying to figure this out.
Ooo. Gosh, I must have just been looking at the wrong number or something. I feel silly now.
When I did that I got this: 2.6 for acetone mole fraction 1.4 for ethyl acetate mole fraction 119 acetate vapor 30 ethyl acetate vapor None of those answers were correct. :[
I see where i went wrong. I was trying to take the mole fraction (.405) and divide it into the 176. Thank you.
i got the mole fraction of cyclohexane in the solution but that isn't what it wants and I don't know exactly what the question is asking for. Can someone please explain to me how to do this problem?
Thank you very much!
Still couldn't get the correct answer :[
