What I do is convert everything to moles (mmoles) in order to figure it out.
19.62 mL * 0.341 M NaOH = 6.69 mmoles OH-
To completely neutralize that, you need an equivalent in H+, so you need 6.69 mmoles H+. However, H2C2O4 produces 2 H+ per dissociation, so you would need half that amount, or...
A 0.0450 M solution of para-aminobenzoic acid had an absorbance of 0.844 at 267 nm in a 1.00 cm cuvet, and an absorbance of 0.034 at 240 nm. A 0.0366 M solution of nicotinic acid had absorbances of 0.010 and 0.755 at 267 and 240 nm, respectively. A MIXTURE of PABA and...
The magnetic field is uniform and out of the page inside a circle of radius R, and is essentially zero outside the circular region (see the figure). The magnitude of the magnetic field is changing with time; as a function of time the magnitude of the magnetic field is...
A neutral metal rod of length 0.35 m slides horizontally at a constant speed of 9 m/s on frictionless insulating rails through a region of uniform magnetic field of magnitude 0.6 tesla, directed into the page as shown in the diagram. Before answering the following...
Write the loop rule for each of the following circuits:
Depending on the loop:
-emf + IR1 + IR2 + .... + IRn = 0
V = IR
If in series: R1 + R2 + ... Rn = R
If in parallel: 1/R1 + 1/R2 + ... 1/Rn = 1/R
The Attempt at a Solution
I solved it all on my own. I'll post the solution here so people will know how to do it if they come across it.
i = naME
i = electron current
n = electron density
a = area
M = electron mobility
E = electric field
For the thin and thick wire, the electron current for both of them is...
The circuit shown above consists of a single battery, whose emf is 1.4 V, and three wires made of the same material, but having different cross-sectional areas. Each thick wire has cross-sectional area 1.4e-6 m2, and is 21 cm long. The thin wire has cross-sectional area...
If the total charge on a rod of length 0.4 m is 2.6 nC, what is the magnitude of the electric field at a location 1 cm from the midpoint of the rod?
[(2QK)/(Y)](1/sqrt(L^2 + 4[(Y)^2]), K = 8.99E9
I don't know if the above equation is actually correct...
Thanks for that. It says that sparks occur when the electric field strength is 3x10^6 N/C.
So if you have that, then:
E = E1 + E2
E = [Q/(A/2e)] + [Q/(A/2e)] (R>>Z)
3x10^6 = 2[Q/(A/2e)]
3x10^6 = 2[Q/(pi(2.4)^2/2(8.58E-12)]
Q = 3E20 N/C.
What am I doing wrong here?
A capacitor consists of two large metal disks of radius 2.4 meters placed parallel to each other, a distance of 0.7 millimeters apart. The capacitor is charged up to have an increasing amount of charge +Q on one disk and -Q on the other. At about what value of Q does a spark...