Mass of flask and stopper: 32.276g mass of flask, stopper, and water: 57.425g (h2o=25 degrees c) mass of flask, stopper, and unknown liquid: 57.235g a. what is the mass of water that fills the flask? b. what is the density of water to 4 significant figures at 25 degrees c? c. what is the volume of the flask? d. what is the density of the liquid?

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 %

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next

What is the mass of oxygen gas is consumed in a reaction that produces 4.60mol so2