Which choice is an element? carbon dioxide water carbon air

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

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 %

An observation that requires measurement is called quantitative observable or qualitative