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yselahernandez02
09.10.2019 •
Chemistry
How many valance elton’s does aluminum have
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Ответ:
13
Explanation:On the periodic table of elements 13 is the atomic number,which is the amount of protons and electrons
Ответ:
Actually, the valence electron number for aluminum is 3
Ответ:
pH = 3 (though the option is missing)
Explanation:
We have a solution with a concentration of the hydrogen ion, [H⁺] = 0.001 mol/L = 0.001 M. We can calculate the pH using its definition.
pH = -log [H⁺]
pH = -log 0.001
pH = 3
Since the pH < 7, the solution is acid. Other way to recognize that a solution is acid is when [H⁺] > 10⁻⁷ M at 25°C.