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Practice problems involving include nomenclature (naming) and formula writing. This answer will focus on the nomenclature and formula writing for binary covalent .

Problem 1. Give the common name for each of the following covalent compounds.
a. $"H"_2"O"$ Answer: water
b. $"NH"_3$ Answer: ammonia
c. $"CH"_4$ Answer: methane
d. $"H"_2"O"_2$ Answer: hydrogen peroxide
e. $"HCl"$ Answer: hydrogen chloride or hydrochloric acid

Problem 2. Write the names of the binary compounds in Problem 1 using prefixes.
a. dihydrogen monoxide
b. nitrogen trihydride
c. carbon tetrahydride
d. dihydrogen dioxide
e. hydrogen monochloride

Problem 3. Write the formulas for the following binary covalent compounds.
a. diphosphorus pentoxide Answer: $"P"_2"O"_5$
b. silicon tetrafluoride Answer: $"SiF"_4$
c. dinitrogen trisulfide Answer: $"N"_2"S"_3$
d. sulfur hexachloride Answer: $"SCl"_6$

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