How many atoms are specified by each of these prefixes: mono-, di-, tri-, tetra-, penta-, hexa-?

Calculate the percentage by mass of oxygen in the following compounds: e. digitoxin, C41H64O13

Determine the number of each type of atom in each formula. a. Sr2HPO4

Determine the number of each type of atom in each formula. b. Co(ClO4)2

Determine the number of each type of atom in each formula. c. Cr2(SO4)3

Write a chemical formula for each molecular model. (See Appendix IIA for color codes.) (a)

Write a chemical formula for each molecular model. (See Appendix IIA for color codes.) (c)

Classify each element as atomic or molecular. a. bromine b. titanium c. oxygen d. potassium

Identify the elements that have molecules as their basic units. a. nitrogen b. argon c. hydrogen d. helium

Classify each compound as ionic or molecular. a. CO₂ b. NiCl₂ c. Nal d. PCl₃