Questions and Answers
What is the name of the compound N2O3?
Dinitrogen trioxide
What is the name of the compound Zn3(PO4)2?
Zinc phosphate
The empirical formula is always the accepted formula for a _____.
Ionic compound
The empirical formula for a component shows the symbols of the elements with subscripts indicating the _____
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What is the oxidation number of sulfur in SO2?
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Which formula correctly represents iron (III) oxide?
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What is the oxidation number of hydrogen in most compounds?
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In a compound, the algebraic sum of the oxidation numbers of all atoms equals _____.
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Which compound's name includes the Greek numerical prefixes di- and tri-?
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What is the oxidation number of carbon in NaHCO3?
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What is the oxidation number of oxygen in peroxides?
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Which is an example of a compound?
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What is the formula for nitrogen trifluoride?
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Of the following molecular formulas for hydrocarbons, which is an empirical formula?
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What is the formula for barium hydroxide?
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Which formula does NOT represent a molecule?
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What is the name of the compound whose formula is H2SO4?
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What is the correct formula for sodium oxide?
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Which statement describes a characteristic of all compounds?
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What is the correct name of the compound with the formula NH4NO2?
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What is the correct formula for calcium phosphate?
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What is the name of Sn3(PO4)4 under the Stock system of nomenclature?
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Name the compound HG2(NO3)2.
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Changing a subscript in a correctly written chemical formula ____.
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Which is the formula of a binary compound?
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What is the oxidation number of hydrogen in KH?
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Name the compound CF4.
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Study Notes
Chemical Compounds and Nomenclature
- Dinitrogen trioxide (N2O3) is an oxonitride compound consisting of two nitrogen atoms and three oxygen atoms.
- Zinc phosphate (Zn3(PO4)2) is formed from zinc ions and phosphate ions.
- Iron (III) oxide has the formula Fe2O3, indicating iron in a +3 oxidation state.
Empirical and Molecular Formulas
- Empirical formulas represent the simplest whole-number ratio of elements in a compound.
- In ionic compounds, the empirical formula is the accepted formula.
- A binary compound features two different elements, exemplified by Al2S3 (aluminum sulfide).
Oxidation States
- The oxidation number of sulfur in SO2 is +4.
- Carbon in NaHCO3 (sodium bicarbonate) has an oxidation number of +4.
- Hydrogen typically has an oxidation number of +1, except in specific cases like KH where it is -1.
Chemical Characteristics
- The algebraic sum of oxidation numbers in a neutral compound equals zero, while in charged ions it equals the charge.
- Peroxides are unique where oxygen has an oxidation number of -1.
- Compounds can be decomposed chemically, distinguishing them from mixtures.
Chemical Formulas and Naming Conventions
- Nitrogen trifluoride is represented by the formula NF3.
- Barium hydroxide is written as Ba(OH)2.
- Ammonium nitrite corresponds to the formula NH4NO2.
Stock System Nomenclature
- Tin (IV) phosphate is named for Sn3(PO4)4, indicating tin in a +4 oxidation state.
- Mercury(II) nitrate corresponds with the formula Hg2(NO3)2.
Reactions and Changes
- Altering a subscript in chemical formulas invalidates the compound identity, yielding a different substance.
- Ammonia is a recognized chemical compound, important in both chemistry and biology.
Studying That Suits You
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Description
Test your knowledge on the compounds and empirical formulas with these flashcards from Chapter 7A. Each card will help you identify compounds and understand their definitions. Perfect for reviewing essential chemistry concepts.
