Bluetooth devices operate in the 2.4GHz range. What is the wavelength and energy of a photo of this light ? What part of the spe
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The alcohol concentration of the mixed solution is 20%
Simplification :
Based on the given condition, formulate :
35% ×0.40 + 0.6 ×10% ÷{ 0.4+0.6}
Calculate the product :
Calculate the sum or difference :
Any fraction with denominator 1 is equal to numerator : 0.2
Multiply a number to both numerator, denominator : 0.2 ×
Calculate the product or quotient :
A fraction with denominator equals to 100 to a percentage 20%.
How do you find the concentration of a mixed solution?
In general when your are mixing two different concentrations together first calculate number of moles for each solution (n=CV ,V-in liter) then add them together it will be total moles,then concentration of mixture will be = total moles / total volume(liter).
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The order of frequency is d < a < c < b
eV
where z = atomic mass number
n = energy level
For hydrogen z = 1
Therefore, Energy for n = 1
eV
= -13.6 eV
for n = 2
eV
= -3.40 eV
for n = 3
eV
= -1.51 eV
for n = 4
eV
= -0.85 eV
for n = 5
eV
= -0.544 eV
n = 2 to n = 4 (absorption)
ΔE = E4 - E2 = -0.85 - (-3.40) = 2.55 eV
n = 2 to n = 1 (emission)
ΔE = E1 - E2 = -13.6 - (-3.40) = -10.2eV
The negative sign indicates that emission will take place.
n = 2 to n = 5 (absorption)
ΔE = E5 - E2 = -0.544 - (-3.40) = 2.856 eV
n = 4 to n = 3 (emission)
ΔE = E3 - E4 = -1.51 - (-0.85) = -0.66 eV
We know that
E = h * υ
Therefore, Energy is proportional to frequency.
So increasing the order of energy is
E4 < E1 < E3 < E2
order of frequency is
d < a < c < b
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