Cesium metal is frequently used in photoelectric cells because the amount of energy necessary to eject electrons from a cesium s
urface is relatively small-only 206.5 kJ/mol. Part A What wavelength of light (in nanometers) does this correspond to?
1 answer:
You might be interested in
Answer:
E.
Explanation:
From the ideal gasses equation we have:
PV=nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
The number of moles is also expressed as:
If replacing this in the ideal gasses equation we have:
If we pass V to divide, we have:
And the density d = , so replacing, we have:
Solving for d, we have:
Now we have to be sure that we have the correct units, so we need to convert the units for pressure and temperature:
-Convert P=98kPa to atm
-Convert T=-25.2°C to K
Finally we can replace the values in the equation: