Answer:
Coal is a sedimentary deposit composed predominantly of carbon that is readily combustible. Coal is black or brownish-black, and has a composition that (including inherent moisture) consists of more than 50 percent by weight and more than 70 percent by volume of carbonaceous material.
Explanation:
The particle size is important because the more finely divided the solid is , the faster the reaction happen. A powdered solid will normally produce a faster reaction because it has greater surface area than the single lump
Hope this helps
A heifer
I dont know if this is a joke or not but the correct term is heifer
The answers are:
Zinc ,Iron , Copper , silver , lead , mercury .