Atomic weight and atomic number of an element is 35 and 17 respectively

Which substance absorbs 58.16 kj of energy when 3.11 mol vaporizes? a)ch4 b)h2s c)co2 d)nacl

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel

Which change to the system wood cause the freely-moving piston to lower?