What density of oxygen gas, O2, from the air is consumed in the combustion of 702g/dm3 of octane, C8H18, one of the principal components of gasoline? 2C8H18 + 25O2 -> 16CO2 + 18H2O.

B) movement of materials into and out of the cell

The correct answer is:   [a]:   "polar easterlies move cool air to the mid-latitudes."

The internal energy of the system we can term it as total potential energy and kinetic energy. energy flows out of the surrounding from the system then we can say that the internal energy of the final state is lower than its initials. the sign of  δesystem is negative.δesystem = efinal - einitial=-ve  efinal  ∠einitial.