Gasoline contains only hydrogen and carbon atoms, yet nitrogen oxide and nitrogen dioxide are produced when gasoline burns. What
2 answers:
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Answer:
275.3 nm is the wavelength of light required for mercury.
Mercury can not be used to generate electricity from the sun because wavelength at which mercury will emit an electron is smaller than 500 nm.
Explanation:
The wavelength of light required for mercury to emit an electron.
The wavelength of the radiation =
Energy required fro mercury to to emit an electron = E
Energy required fro mercury to to emit an electron will the energy if the radiation = E' =
E' = E
To calculate the wavelength of light, we use the equation:
where,
= wavelength of the light
h = Planck's constant =
c = speed of light =
Wavelength of the sun light in the visible region = 500 nm
500 nm > 275.3 nm
Less energy < more energy
So, this means that mercury can not be used to generate electricity from the sun.
Explanation:
It is known that molality is the number of moles present in kg of solution.
Mathematically, Molality =
The given data is as follows.
Molar mass of ammonia = 17 g/mol
Concentration = 1.002 mg/L =
= mol/L
Also, density = = 1 kg/L
Therefore, molality will be calculated as follows.
Molality =
=
And,
Molar mass of nitrite = 46 g/mol
Concentration = 0.387 mg/L =
= mol/L
And, density = = 1 kg/L
Hence, molality =
= mol/kg
Now, Molar mass of nitarte = 62 g/mol
Concentration = 1352.2 mg/L
=
= 0.02181 mol/L
Also, density = = 1 kg/L
Hence, molality will be calculated as follows.
Molality =
= 0.02181 mol/kg
Therefore, molality of given species is for ammonia,
mol/kg for nitrite, and 0.02181 mol/kg for nitrate ion.