Multiple Choice
Which of the following is the correct chemical formula for barium acetate?
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following is the correct chemical formula for manganese(II) oxide?
A
Mn2O3
B
MnO
C
Mn3O4
D
MnO2
Verified step by step guidance1
Identify the oxidation state of manganese in manganese(II) oxide. The Roman numeral II indicates that manganese has a +2 charge (Mn^{2+}).
Determine the charge of the oxide ion. Oxygen typically forms an oxide ion with a -2 charge (O^{2-}).
To write the correct formula, balance the total positive and negative charges so the compound is electrically neutral.
Since Mn^{2+} and O^{2-} have charges of equal magnitude but opposite sign, they combine in a 1:1 ratio.
Therefore, the correct chemical formula for manganese(II) oxide is MnO.
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