Answer:
λ = 548.7 nm
Explanation:
Hi!
First we want to know how much energy we need to remove 1 electron from the surface of the solid:
218.1 kJ/mol => 218 100 J / (6.022 x 10^23) electrons
= 3.621 x 10^-19 J/electron
That is we need 3.621 x 10^-19 J to remove one electron
Now we can calculate the wavelength that a photon must have in order to have this energy:
E = (hc) / λ
λ = (hc) / Ε
where
h = 6,626070150(69) ×10 -34 Js (wikipedia)
c = 3 x10^8 m/s
hc = 1.987 x 10^-25 Jm
Therefore:
λ = ( 1.987 x 10^-25 /3.621 x 10^-19 ) m = 5.487 x 10^-7 m
λ = 548.7 nm
Answer:
ithe bridge is about 3.01 or exactly 3.0081632653
Answer:
Brownian motion and diffusion
Explanation:
Brownian motion: taking into consideration, SMOKE. when a burning fire is kindled, smoke is seen to move in the way or direction that is not straight but keep changing continuously ( in haphazard manner). Haphazard manner of smoke is an evidence that matter are made of molecules and are constantly in motion
When sediment has built up over time layers of rock start to form, starting with sedimentry rocks, then metamorphic rocks