What is the de Broglie wavelength of an electron traveling at 1.27×10^5m/s?

Which statement is best described as a atom

An experimental procedure requires a 10 ml of acid to be dissolved

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.