How many carbon atoms are present in a mole of 12c?

How manyatoms of mercury are in 1.4214e+1 ml sample

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.