Which of the following describes a crystal? * A homogeneous solid
has a highly ordered microscopic structure
has a geometrically regular form
All of the options describe crystals

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

Tell me the iupac names of the following alcohols:

Scientists are often interested in knowing the molar heat of combustion – the heat released during the combustion of one mole of a substance. use the periodic table to find molar masses. how many moles of ethanol are present in the sample?