5. For the titration of 50.00 mL of 0.0500 M Ce4+ with 0.1000 M Fe2+ in the presence of 1 M H2SO4, please calculate the system potential while 3.00 mL of Fe2+ is added.
Ce4+ + e <==> Ce3+, E0 = + 1.44 V (in 1 M H2SO4)
Fe3+ + e <==> Fe2+, E0 = + 0.68 V (in 1 M H2SO4).
Answer is 1.49 V
5b) In the above titration, what's the electrode potential after 28.90 mL of Fe2+ is added?
Answer is 0.73 V.
Just wondering, how they got that?
In: Chemistry
•• A meter stick is moving with speed relative to a frame S. (a) What is the stick’s length, as measured by observers in S, if the stick is parallel to its velocity v? (b) What if the stick is perpendicular to v? (c)What if the stick is at to v, as seen in the stick’s rest frame? [HINT: You can imagine that the meterstick is the hypotenuse of a 30–60–90 triangle of plywood.] (d) What if the stick is at 60° to v, as measured in S?
Not hand-writing please (only if it is very clear).
I only need part c and d.
In: Physics
2. A 15-MΩ resistor and a 48-nF capacitor get connected in series to a 15-V battery. a. How long will it be until the capacitor is “fully” charged? b. If the battery is then disconnected from the circuit, how long will it be until the capacitor’s voltage is 9.0 V? What is the charge of the capacitor at that moment? c. If we’d like the capacitor’s voltage in this circuit to decrease from 15-V to 9.0-V in 1.5 seconds after the battery gets disconnected, how should the capacitance of the capacitor change (increase or decrease, and by how much)?
In: Physics
A capacitor of unknown capacitance C is charged to 130 V and connected across an initially uncharged 75 uF capacitor. if the final potential difference across the 75 uF capacitor is 47 V what is C? After you find the value of C, you charge this capacitor C to a potential difference V=140 V between its plates. The charging battery is now disconnected and a slab material ( k=7.20 is slipped between the plates. what is the potential energy of the device, both before and after the slab is introduced?
In: Physics
ive an example of a simple, undirected graph that has a single source shortestpath tree which breadth-first search will not return for any ordering of its vertices.Your answer must
(a) Specify the graphG= (V, E)by specifying V and E.
(b) Specify the single source shortest path treeT= (V, ET) by specifying E T and also specifying the roots∈V.
(c) and include a clear explanation of why the breadth-first search algorithm we discussed in class will never produce T for any orderings of the vertices.
In: Computer Science
Determine the quality (if saturated) or temperature (if superheated) of the following: (show details of your answer, not just write the final answer)
a) Water at p=50 kPa, v=1 m3/kg
b) Water at p=1.6 MPa, v=0.15 m3/kg
c) Water at p=7 MPa, h=3160 kJ/kg
d) Refrigerant R-134a at p=200 kPa, v=0.009 m3/kg
e) Refrigerant R-134a at p=0.2 MPa, v=0.12 m3/kg
In: Mechanical Engineering
Annotate these equations
v=d/t a=∆v/t average speed =total distance/total time v=v0+at d=v0t+1/2at² Fnet=ma w=mg ac=v²/r Fc=mv²/r W=Fd P=W/t
EK=1/2mv² W= ∆EK Es=1/2kx² Eg=mgh TC=5/9(TF−32) TF=9/5TC+ 32 TK=TC+ 273 Q=mc∆t Q=±mL
In: Physics
Vapor pressure of a pure liquid lab experiment
Why is the value of the heat of vaporization for sucrose greater than water? comment on the effect of a non-electrolyte such as sucrose on the vapor pressure and delta vap H.
What can be the possible systematic source of error in this experiment?
In: Chemistry
In: Mechanical Engineering
There are four classical experiments provided below. Select one experiment. Evaluate the method of studying this topic. Do you agree with the conclusions?
- Milgram's study on obedience
- Asch's study of conformity
- Zimbardo's Stanford Prison Experiment
- Stanley Schacter's Fear and Affiliation Study
In: Psychology