First, we write the equation of formation of potassium chloride from chlorine:
2K + Cl₂ → 2KCl
Each mole of Cl₂ produces two moles of KCl
Therefore, the conversion factor is:
Moles of chlorine = 2 x moles of potassium chloride
The diaphragm of a microscope that you are using has to adjusted when you need to vary the intensity and the size of the cone of light that is reaching the slide on which you have your specimen.
From the information provided in the question, we can see that; the electron moved up to an energy level and has an energy of 21.72 x 10-19 J.
Bohr's model of the atom tells us that electrons are found in certain specific energy levels. Energy is absorbed when an electron moves from a lower to a higher energy level and energy is released when an electron moves from a higher to a lower energy level.
Given that;
ΔE = E2 - E1
E2 = final energy level
E1 = initial energy level
E2 = ?
E1 = 16.32 x 10-19 J
ΔE = 5.4 x 10-19
E2 = ΔE + E1
E2 = 5.4 x 10-19 + 16.32 x 10-19 J
E2 = 21.72 x 10-19 J
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Answer:
because water wets stuff expect for fire.