I think Magnesium not sure because the relative atomic mass of magnesium is 24,31.
Answer:
division of atoms are neither created nor destroyed therefore atoms can only be rearranged
The binding energy of the electron is 1.237 ×10^(-16) kj/ mol.
The given parameter
wavelength of photon,
λ = 0.999nm
= 0.999x10⁻⁹ m
K.E of emitted photon,
K.E = 940 ev
The binding energy of electron is calculated as follows:
From Einstein's mass defect equation=
ΔE = Δmc²
Also, from Einstein's photo electric equation=
E = Ф + K.E
Where;
Ф is binding energy of electron on metal surface.
The energy of on mole of electron, the emitted is calculated as:
![E = hf =h \frac{c}{λ} = (6.626×10^{-34} ) × \frac{{3×10^{8} }}{0.999×10^{-9} } \\\\E= 1.989×10^{-16}](https://tex.z-dn.net/?f=E%20%3D%20hf%20%3Dh%20%5Cfrac%7Bc%7D%7B%CE%BB%7D%20%3D%20%286.626%C3%9710%5E%7B-34%7D%20%29%20%C3%97%20%5Cfrac%7B%7B3%C3%9710%5E%7B8%7D%20%7D%7D%7B0.999%C3%9710%5E%7B-9%7D%20%7D%20%5C%5C%5C%5CE%3D%201.989%C3%9710%5E%7B-16%7D)
The K.E of emitted electron in Joules is
![K.E = 940 × \frac{1}{2} ×1.602 ×\ 10^{-19} J\\\\ = 0.752 × 10^{-16} J](https://tex.z-dn.net/?f=K.E%20%3D%20940%20%C3%97%20%5Cfrac%7B1%7D%7B2%7D%20%C3%971.602%20%C3%97%5C%2010%5E%7B-19%7D%20J%5C%5C%5C%5C%20%20%20%20%20%20%20%20%20%20%20%20%20%20%3D%200.752%20%C3%97%2010%5E%7B-16%7D%20J)
The binding energy is electron is calculated as:
![Ф = E - K.E\\= (1.989 - 0.752) ×10^{-16}\\ =1.237 × 10^{-16} J](https://tex.z-dn.net/?f=%D0%A4%20%3D%20E%20-%20K.E%5C%5C%3D%20%281.989%20-%200.752%29%20%C3%9710%5E%7B-16%7D%5C%5C%20%3D1.237%20%C3%97%2010%5E%7B-16%7D%20%20J)
Question: An X-ray photon of wavelength 0.999nm strikes a surface. The emitted electron has a kinetic energy of 940 eV. What isthe binding energy of the electron in kJ/mol? (KE=1/2mv2; 1 electron volt (eV) = 1.602 x10-19J)
Learn more about binding energy: brainly.com/question/15718710
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Assuming that the conditions are standard and that the alkanes are in a gaseous state, then we can simply use stoichiometry and molar masses.
366 mL C5H12 x 1 mole C5H12/ 22.414 x 10^3 mL x 1 mole C5H8 / 1 mole C5H12 x 22.414 10^3 mL / 1 mole C5H8
= 366 mL of C5H12<span />
Answer:
I) Toward reactants
II) Toward products
Explanation:
In order to predict the shift in the equilibria with a temperature increase, we need to consider Le Chatelier's Principle: if a system at equilibrium suffers a perturbation, it will react to counteract the effect of such perturbation.
I) CO(g) + H₂O(g) ⇆ CO₂(g) + H₂(g), ∆H° = −41 kJ
Since ∆H° < 0, the reaction is exothermic. If the temperature is increased, the equilibrium will shift toward the reactants, to absorb heat and reduce the temperature.
II) N₂O₄(g) ⇄ 2 NO₂(g), ∆H◦ = +57 kJ
Since ∆H° > 0, the reaction is endothermic. If the temperature is increased, the equilibrium will shift toward the Products, to absorb heat and reduce the temperature.