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K⁺ and F⁻ are the more likely to form an ionic bond.
Ionic bonds are the result of the electrostatic attraction between positive and negative ions (charged atoms). Of the listed substances, the ones that are charged are K⁺ and F⁻, so they are the ones that will form ionic bonds. Some ionic substances made from K⁺ include KCl (used in fertilizers) and some ionic substances made from F⁻ include NaF (used in dental therapy).
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Neutrons have the same mass as protons
so the number of neutrons = mass number - atomic number
or for simplicity you can remember it as n=(n+p)-p
What is the frequency of radiation with a wavelength of 5.00 X 10^-8 m
Frequency F (1/s)
Wave Velocity V = 299,792,458 m/s
Wave length L = 5.00 X 10^-8 m
F = V/L = 299,792,458/0.000,000,005 = 5.99584916e+16
Answer:
5.521 × 10⁻² mol/m².s
Explanation:
Given:
Pressure of the Methane and Helium gas = 101.32 kPa
Temperature of the Methane and Helium gas = 298 K
Partial pressure of Methane, pA₁ = 60.79 kPa
Partial pressure of Methane at point 0.02 m away, pA₂ = 20.26 kPa
Now,
Molar flux is given as:
Here,
= 0.675 × 10⁻⁴ m²/s (for He-CH4 at 101.32 kPa and 298 K)
Z₂ - Z₁ = 0.02 m
R is the ideal gas constant = 8.314 J/mol.K
T is the temperature = 298 K
On substituting the respective values, we get
or
= 5.521 × 10⁻² mol/m².s
