Which of the compounds below is not an example of a molecular solid?

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy

If a gas has an initial pressure of 101kpa and a volume of 10l, then it expands to a volume of 20l, what is the new pressure?

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.