List 2 physical properties that can be used to differentiate between a Cu ( before 1982) penny and a Zn (after 1982) penny.

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Find the mass in grams of 1.37x1020 particles of h3po4

Find the missing probability in the table below a.0.10 b.40 c.0.80 d. 0.20