The kinetics of the decomposition of dinitrogen pentaoxide is studied at 50°c and at 75°c. which of the following statements concerning the studies is correct? answer the rate at 75°c will be greater than the rate at 50°c because the activation energy will be lower at 75°c than at 50°c. the rate at 75°c will be greater than the rate at 50°c because the activation energy will be higher at 75°c than at 50°c. the rate at 75°c will be less than the rate at 50°c because the molecules at higher speeds do not interact as well as those at lower speeds. the rate at 75°c will be greater than at 50°c because the concentration of a gas increases with increasing temperature. the rate at 75°c will be greater than the rate at 50°c because the number of molecules with enough energy to react increases with increasing temperature.

Can someone me with questions 12 and 13 plz.

Straightforward questions answered in the powerpoint slidesreaction: heating the starting materials under refluxwhat does it mean to heat under reflux? why do we choose water as the reflux solvent? what are boiling chips used for? why do we put a condenser on top of the reaction? why do we add heat and let the reaction stir for 30 minutes? why do we add sulfuric acid to the reaction after it cools as opposed to when it’s still hot? separation: filtration of precipitatewhy don’t we do an aqueous and organic extraction in the separatory funnel? why do you rinse the salicylic acid on the filter with ice cold water? purification: recrystallization of salicylic acid (no hot filtration needed)what is the difference in the amount of room temperature water vs. boiling water needed to dissolve the salicylic acid (assume a 1.2 gram yield of salicylic acid)? remember, in the lab if you need x ml of boiling water to dissolve a solid, then you should add a little more (definitely no more than 1.5 times the theoretical amount) to ensure it doesn’t recrystallize prematurely. analysis: melting point of salicylic acidwhat can you conclude if the melting point of the salicylic acid you just synthesized is 152-155oc and the 1: 1 mix of your product and “synthetic” salicylic acid is 151-154oc?

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth