Animal cells do not have

Quickly what are the following of organisms that existed over a wide area but only for a limited time period called a.soft fossils b.mold fossils c.index fossils d.trace fossils

How many distinct monochlorinated products, including stereoisomers, can result when the alkane below is heated in the presence of cl2? 3 4 5 6 7?

All chemical reactions use reactants in a specific proportion or stoichiometry to form products. the reactant regulates the amount of products produced. a) excess b) limiting c) proportional d) stoichiometric