In the 1930s a telephone-company engineer named Karl Jansky was trying to track down

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.

Classify this reaction: 2al+n2-> aln.

What does the symbol (–hfus) indicate in a phase change?