Answer:
metals-
-ductile
-malluble
-can be drawn into wired
-can be hammered into thin sheets
-good conductors of heat/ electricity
non-metal-
-brittle
-poor conductors of heat/electricity
-non ductile
-non maluble
-gasess at room temperature
The letter T represents groundwater
Answer:
The pH os the substance is 1,92.
Explanation:
The pH is a measure that gives us an idea of the acidity or alkalinity of a solution. It is calculated as:
pH = -log (H +)= -log (1.2 x 10^-2 )=1,92
The pH scale ranges from values of 0 to 14 (less than 7.0 is acidic and greater than 7.0 is basic, a pH = 7.0 is neutral). In this case, the substance is acidic.
Answer : The correct option is,
Solution :
Formula used :
where,
E = change in energy
h = Planck’s constant =
c = speed of light =
= wavelength = 2.21 m
Now put all the given values in the above formula, we get the energy of an atom.
Therefore, the energy of an atom is,
The Ka of the solution is 8.1 * 10^-9.
<h3>What is the pH?</h3>
The pH of a solution is the concentration of hydrogen ions in the solution.
Number of moles of the acid = 26.816g/153.483g/mol = 0.175 moles
Concentration of the acid = 0.175 moles/0.5 L = 0.35 M
Now we know that the acid reacts with water as follows;
HA(aq) + H2O(l) ------> H3O^+(aq) + A^-(aq)
[H3O^+] = Antilog (-4.274)
[H3O^+] = 5.32 * 10^-5 M
Since;
[H3O^+] = [A^-] = x
Ka = x^2/[HA]
Ka = (5.32 * 10^-5)^2/( 0.35)
Ka = 8.1 * 10^-9
Hence, the Ka of the solution is 8.1 * 10^-9.
Learn more about Ka:brainly.com/question/16035742
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