What is the mass of ethane at STP with a density of 2.1 g/L.

What is the volume occupied by 10.0 dm3 of gas at standard pressure after it has been compressedat constant temputure to 500.0 kpa?

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure