Which of the following statements is true? a both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction. b neither chemical reaction rates nor nuclear decay rates vary with the conditions of the reaction. c nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not. d chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not.

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 %

Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?