Pyroclastic material is classified primarily by the size of the particles. What is the basis for classifying lava?

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Stage in which a typical star has completely stopped fusion

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