Draw all staggered and eclipsed conformations using Newman projections (looking down the C2-C3 bond) as well as line-and-wedged structures of 2-methylbutane. Determine the most stable and least stable conformations. Use the following chart to estimate the relative energies of each conformation.

Adepositional also feature that forms where a stream enters a lake or an ocean is a

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]