Which of these is true about the angle of incidence and angle of reflection

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

Ethanol (c2h5oh) is produced from the fermentation of sucrose in the presence of enzymes. c12h22o11(aq) + h2o(g) 4 c2h5oh(l) + 4 co2(g) determine the theoretical yield and the percent yields of ethanol if 680. g sucrose undergoes fermentation and 326.5 g ethanol is obtained. theoretical _ g _ percent %

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