What is enthalpy a measure of?
the heat content of a system.
the kinetic energy of a system.
the number of moles of reactant in a system.
the disorder of a system.

What elements have 2 electrons inthe 4s sublevel

The velocity of any object depends upon a) the location of the object. b) the location of the observer. c) which measurement tools are used. d) the relative motion of the observer.

Acompound has the molecular formula c3h8. which class of organic compounds does it belong to?