How many moles are 2.78 x 1025
compounds of potassium chloride, KCI?

__can be defined as which velocity changes

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

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.