Answer:
E = 1.33 MeV = 2.13 x J
v = wavelength = E / h = 2.13 x / 6.626 x
= 3.2 x
m
f = frequency = c / 3.2 x m = 3 x
/ 3.2 x
= 9.375 x
Hz
Explain why the process of mining uranium involved in the use of nuclear energy has the greatest environmental impact of the ent
2 answers:
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Answer:
<u>8.08 × </u><u> atoms of hydrogen</u>
Explanation:
From the given data, we have two categories of variables (unknowns):
- Amount (moles or mass) of Caffeine
- Amount (moles or mass) of Hydrogen
The longer route would be to solve for these variables first, by determining the number of moles of the Caffeine sample (0.134 moles of C8H10N4O2) from the mass of carbon (12.89 g = 1.07 moles in 6.47 atoms) provided. And then solve for the number of atoms of H. <u><em>[N.B: 1 mole of ANY substance = 6.022 × </em></u>
<u><em> atoms ]</em></u>
Alternatively and quicker, we can use the mole ratios of the Carbon:Hydrogen atoms in the compound.
8 : 10 ≡ 4 : 5
If 4 moles -- 6.47 atoms
Then 5 moles -- ?? atoms
⇒ No. of atoms of Hydrogen =
<u>=8.08 × </u><u> atoms of hydrogen</u>
Answer:
8.533 Mev/nucleon
Explanation:
The given elements is:-
Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.
Thus, the number of protons = 25
Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.
Mass number = Number of protons + Number of neutrons
55 = 25 + Number of neutrons
Number of neutrons = 30
Mass of neutron = 1.008665 amu
Mass of proton = 1.007825 amu
Calculated mass = Number of protons*Mass of proton + Number of neutrons*Mass of neutron
Thus,
Calculated mass = (25*1.007277 + 30*1.008665) amu = 55.441875 amu
Actual mass = 54.9380451 amu
Mass defect = Δm = |54.9380451 - 55.441875| amu = 0.5038299 amu
The conversion of amu to MeV is shown below as:-
1 amu = 931.5 MeV
So, Energy = 0.5038299*931.5 MeV= 469.317552 MeV
Total number of nucleons in the atoms = 55
<u>So, Energy = 469.317552/55 MeV/nucleon = 8.533 Mev/nucleon</u>