Reaction type and Chemical Equation Balancing

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

Amethod of separation that employs a system with two phases of matter, a mobile phase and a stationary phase, is called