His model of the hydrogen atom led to an accurate calculation of the wavelengths of light emitted by an excited hydrogen atom.

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Which position represents spring in the southern hemisphere? a) b) c) d)

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.