Answer:
A ratio is a way to compare quantities of things.
Explanation:
by dividing the number of moles of each by the smallest number of moles.
<span>The charged balloon will stick to a neutral wall because of the Static Electricity:
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The matter is formed by atoms and these atoms are composed of electrons, protons and neutrons (the electrons have a negative charge, the protons have a positive charge and the neutrons have no charge).
As the balloon is charged (It gained electrons), and the charge of the same sign repel each other, when it approaches the wall, the electrons of this wall will move away, and the positive charges (protons) will remain in the nearest area to the balloon. As the charges of different signs are attracted, the balloon will be stuck to the wall.
Answer:
Explanation:
Using the given equation, we calculate the energy associated with the excited state 
and 
Helium has an atomic number (Z) equal to 2, for n=8:
For n=4:
When an electron jumps from an energy level with greater energy 
to one with lower energy 
the wavelength of the emitted photon is given by:
h is the Planck constant and c the speed of light in vaccum. So, we have:
