The wavelength is 4.0 * 10^-13 m while the frequency is 7.5 * 10^20 s−1
Using the formula;
E =hf
Where
E = Energy of the photon
f = Frequency of photon
h = Plank's constant = 6.6 * 10^-34 Js
To obtain the energy in Joules;
E = 3.02 × 10^11 J/mol/6.02 * 10^23 mol
= 5 * 10^-13 J
f = E/h
f = 5 * 10^-13 J/6.6 * 10^-34 Js
f = 7.5 * 10^20 s−1
f = c/λ
c = speed of light = 3 * 10^8 m/s
λ = c/f
λ = 3 * 10^8 m/s/7.5 * 10^20 s−1
λ = 4.0 * 10^-13 m
The wavelength is 4.0 * 10^-13 m while the frequency is 7.5 * 10^20 s−1
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Complete Question
The complete question is shown on the first uploaded image
Answer:
The correct option is A
That is 2,4,5-Trimethyl-4-propylheptane
Explanation:
Looking at the structure the longest carbon chain is 7 as shown on the second uploaded image
Also from the diagram of the structure we can identify that is longest chain has 3 methyl group attachment and one propyl group attachment
Now going through this longest chain the numbering of this attachment them the lowest number is the correct way so as we can see
2,4,5-Trimethyl-4-propylheptane gives the lowest numbering compared to 3,4,6-Trimethyl-4-propylheptane so the correct IUPAC names is 2,4,5-Trimethyl-4-propylheptane
Because pure silicon is a perfect semiconductor.
For room temperature, it rarely conducts, you can search for the threshold temperature, the characteristic equation is fairly complicated.
if you have 1mol of NO. how many molecules of NO are there
Answer:
6.02 x 10²³ molecules
Explanation:
Given parameters:
Number of moles of NO = 1 mole
Unknown:
Number of molecules in NO;
Solution:
A mole of compound contains the Avogadro's number of particles.
1 mole of a substance contains 6.02 x 10²³ molecules
So, 1 mole of NO contained 6.02 x 10²³ molecules