Answer: 1,102.91 °C
Explanation; 1,376.06 - 273.15 = 1,102.91
Explanation:
The given data is as follows.
Energy needed for 1 mole = 279.7 kJ = ![279.7 \times \frac{1000 J}{1 kJ}](https://tex.z-dn.net/?f=279.7%20%5Ctimes%20%5Cfrac%7B1000%20J%7D%7B1%20kJ%7D)
= 279700 J
Therefore, energy required for 1 atom will be calculated as follows.
![\frac{279700}{6.022 \times 10^{22}}](https://tex.z-dn.net/?f=%5Cfrac%7B279700%7D%7B6.022%20%5Ctimes%2010%5E%7B22%7D%7D)
= ![4.645 \times 10^{-19} J](https://tex.z-dn.net/?f=4.645%20%5Ctimes%2010%5E%7B-19%7D%20J)
As relation between energy and wavelength is as follows.
E = ![\frac{hc}{\lambda}](https://tex.z-dn.net/?f=%5Cfrac%7Bhc%7D%7B%5Clambda%7D)
where, h = planck constant = ![6.62 \times 10^{-34} Js](https://tex.z-dn.net/?f=6.62%20%5Ctimes%2010%5E%7B-34%7D%20Js)
c = speed of light = ![3 \times 10^{8} m/s](https://tex.z-dn.net/?f=3%20%5Ctimes%2010%5E%7B8%7D%20m%2Fs)
= wavelength
Therefore, putting given values into the above formula as follows.
E = ![\frac{hc}{\lambda}](https://tex.z-dn.net/?f=%5Cfrac%7Bhc%7D%7B%5Clambda%7D)
=
=
or, =
m
= 428 nm
Thus, we can conclude that the maximum wavelength of light that can remove an electron from an atom on the surface of lithium metal is 428 nm.
Ρ=19.3 g/cm³
a=5.00 cm
the volume of a cube is:
v=a³
the mass of the cube is:
m=vρ=a³ρ
m=5.00³*19.3=2412,5 g
Answer:
Save the *minerals* used to extract metals.
Answer:
Can you get a closer picture, then I can help! It looks like it says something on rain, hail and something else. I cant see it though! :)
Explanation: