Which of the following changes has a decrease in entropy? (3 points) n2o4 (g) yields 2no2 (g) c6h6 (l) yields c6h6 (g) 2liclo3 (s) yields 3o2 (g) + 2licl (s) 3fe (s) + 2o2 (g) yields fe3o4 (g)

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

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 %

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal