Zn2+(aq) + 2e- -> Zn(s) E = -0.76
Br2(aq) + Zn(s) -> Zn2+(aq) + 2Br-(aq)
E cell = E cathode - Eanode = 1.06-(-0.76) = 1.82 V
Calculate the shedd eledtac hemical patential D n-Br.baties. ?(the 2+ 2
hemical Calculations Section O r CotentUn ry ▽ Asselret, ▽ Communication ▽ Resores ▽ Design ▽ Chapter 9 and 10 homework- Quiz Chald Williams: Acempe D) 6.02 x 1023 moles Question 3 (10 points) Balance the following eguatice Question 4 (10 points) a chemical reaction of sulfur and iron, how many moles of sulfur are needed to react with 1.42 moles iron? The unbalanced equation is 2.13 moles S s3 moles S c 0.950 moles S D 119 mole S...
24. Calculate the energy d) change associated with an electron transition from n-2 to n 5 in a Bohr hydrogen atom A) 6.5 x 10-19 J B) 5.5x 10-19 J C)8.7x 10-20 J D) 4.9x 10-19J E) S.8x 10-53 I
A capacitor consists ot two charged disks ot radius 4.1 m separated by a distance s-2 mm (see the tiqure) The magnitude of the charge on each disk is 45 uC. Consider points A, B, C, and D inside the capaditor, as shown in the diagram, The distance s1.3 mm, and the distance s2-0.7 mm. (Assume the +x axis is to the right, the ty axis ls up, and the +z axis ls out R> S +0 -0 (a) What...
Problem 3 (20 points) Calculate the 2x2 DCT of the following 2-D signal x[n,n,]=1 L'z 01 et en moderne dhe nuket 2.3.4. sepertirely where ai, ai, a3, and as are the numbers: 2, 3, 4, 5, respectively. (Show your steps)
a) Calculate ?̂2.
b) Briefly interpret ?̂2.
c) Calculate ?̂1.
d) Calculate ???(?̂2).
e) Calculate ???(?̂1).
f) Calculate ???(?̂1, ?̂2).
g) Calculate the sample variance of the error term.
h) Calculate the sample variance of the slope coefficient
???̂(?̂2) .
i) Compute TSS.
j) Compute ESS.
k) Compute RSS.
l) Calculate the coefficient of determination, ? 2 .
m) Briefly interpret ? 2 .
n) Calculate the correlation coefficient, ?.
o) Test the hypothesis ?2 = 2.
p) Construct a...
Calculate the convolution sum x{n]=x[n]*x,[n]: 3. a). xn] S[n]+36[n-1]+28[n-2], x,[n]- u[n]- u[n-3) b). [n]- S[n]+ d[n=1]+S[n-2]+0.58[n-3]+ S[n-51,x,[n]- x,[2n] 4. An LTI system is described with the following LCCDE: In]=x[n]+2y[n-1] a). Plot a block diagram to show the input-output relationship. b).With the input x[n]= S[n], and known y[0] = 0 . Find out the output sequence In] using recursive calculation. 5. A system is described with the following figure, find out a suitable LCCDE to express the input-output relationship y[n] [n]...
Calculate ΔE in kJ/mol if the electron "falls" from n = 2 to n = 1 (known as a 2→1 transition). A. -1 B. -984 C. 984 D. 1
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6. (a) Calculate the difference in energy, AE, between the n=3 and n 2 energy levels in a Bohr hydrogen atom. I (b) Calculate the wavelength (in nm) of the light emitted when an electron drops from the n=3 to the n 2 energy level of a Bohr hydrogen atom. 7) Of the following transitions in the Bohr hydrogen atom, the results in the absorption of the highest-energy photon. A) n 1-n= 6 B) n-3n-6 C) n 1n=4 transition...
3. N is the rating of a diffraction grating in lines/centimeter. Calculate d, the distance between adjacent lines, in micrometers. 4.5000E + 2 lines/cm
calculate the unit step response of a system with the difference equation y[n]+1.5y[n-2]=x[n]-x[n-1], y[-1]=2 ,y[-2]=1 which one of these choose a)0.5(-0.5)^n-3(-1)^n b)0.75(-0.5)^n-2(-1)^n c)0.5(-0.25)^n-3(-1.5)^n d) 1(-0.5)^n-3(-1)^n