5.40 g of copper oxide was obtained by treating the 4.32 g of copper with nitric acid and subsequent ignition. Similarly 2.3 g of copper oxide on reduction gave 1.84 g of copper in another experiment. Show that these data illustrate the law of constant composition.​

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 %