Is the number of atoms in one mole is so large thst it is expressed in sceintific notarion true or false

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

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

What is the measured amount of a product obtained from a chemical reaction?