Decide whether each of the following is a physical property or a chemical property of the substance.
a. Salt substitute, potassium chloride, dissolves in water.
b. Seashells, calcium carbonate, fizz when immersed in vinegar.
c. The gas hydrogen sulfide smells like rotten eggs.
d. Fine steel wool (Fe) can be burned in air.
e. Pure water freezes at 0oC.