A certain compound is made up of three chlorine atoms, one phosphorus atom, and one oxygen atom. What is the chemical formula of
1 answer:
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Answer:
the frequency of photons
Explanation:
Given: first ionization energy of 1000 kJ/mol.
No. of moles of sulfur = 1 mole
We know that plank's constant
Let the frequency of photons be ν
Also we know that ΔE = hν
this implies ν = ΔE/h
Hence, the frequency of photons
The kinetic energy of the emitted electrons of cesium when it is exposed to UV rays of frequency is
Further Explanation:
Photoelectric effect:
When light is made to fall on any substance, electrons are emitted from it. This is known as the photoelectric effect and the emitted electrons are called photoelectrons. The electrons are emitted because of the transference of energy from light to the electrons.
Cesium is a member of the alkali metal group so it is highly reactive and shows photoelectric effect to the maximum extent. It can remove its electron so easily because of its atomic size. Due to large atomic size of cesium, its outermost electrons are held very less tightly to the nucleus and therefore removed easily.
According to the Planck-Einstein equation, the energy is proportional to the frequency and is expressed as follows:
......(1)
Here,
is the energy.
is the Plank’s constant.
is the frequency.
The frequency of UV rays is or
The value of Planck’s constant is .
Substitute these values in equation (1)
But when electrons are ejected out from the surface of the substance, all of its energy is considered as kinetic energy.
So the kinetic energy of the electrons is .
Learn more:
1. Statement about subatomic particle: brainly.com/question/3176193
2. The energy of a photon in light: brainly.com/question/7590814
Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Structure of the atom
Keywords: kinetic energy, frequency, energy, photoelectric effect, Planck's constant, light, electrons, photoelectrons, proportional, transference, reactive, cesium.
Answer:
114 kPa
Explanation:
Using Gay-Lussac's law you get the equation and converting celcius you get the final equation of
. After dividing 85.5 by 27+273(300) you get 0.285 and then you multiply 0.285 by 127+273 (400). You finally get 114 kPa