Sublimation.
Since evaporation is liquid into gas, melting is solid into liquid and deposition is the geological process where sediments are added to land forms.
The percent abundance of the post-1982 pennies is 56%.
<h3>What is percent abundance?</h3>
Percent abundance is the percentage amount of all naturally occurring isotopes of an element.
<h3> Percent abundance of the post-1982 pennies</h3>
The percent abundance of the post-1982 pennies is calculated as follows;
percent abundance = number of post-1982 pennies / total number of pennies x 100%
percent abundance = (28) / (50) x 100%
percent abundance = 56%
Thus, the percent abundance of the post-1982 pennies is 56%.
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When PH = ㏒(H^+)
[H+] = 10^-3.67
[H+] = 2.14x 10^-4
so according to the reaction equation:
HF ↔ H^+ + F^-
at equilibrium X-(2.14x10^-4) (2.14x10^-4) (2.14x10^-4)
by substitution in Ka formula:
Ka = [H+][F]-/[HF]
6.8x10^-4 = (2.14x10^-4)*(2.14x10^-4) /(X-2.4x10^-4)
X-2.4x10^-4 = (4.58x10^-8)* (6.8x10^-4)
∴X = 2.4x10^-4
∴[HF] = X- (2.14x10^-4)= (2.4x10^-4)-(2.14x10^-4) = 2.6 X 10^-5
