A good yield of photosynthesis for agricultural crops in bright sunlight is 20 kg of carbohydrate (for example, sucrose) per hectare per hour. (1 hectare = 10 4 m 2 ). The net reaction for sucrose formation in photosynthesis can be written 12CO2(g) + 11H2O(l)S C12H22O11(s) + 12O2(g) . a. Use standard enthalpies of formation to calculate D r H ° for the production of 1 mol of sucrose at 25°C by the reaction above. b. Calculate the energy equivalent of photosynthesis that yields 20 kg of sucrose (hectare −1 h −1 ) . c. Bright sunlight corresponds to radiation incident on the surface of Earth at about 1 kW m −2 . What percentage of this energy

2points why do scientists need governmental funding? o a. government politicians ask all the important scientific questions. o b. scientists have to pay taxes to the government on the money they make. o c. the cost of doing scientific research can be very high. o d. the government is controlled by scientists. submit

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.