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Chemical Formulas Quiz
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chromium(II) nitrate
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A
Cr(NO3)2
💡 Explanation:
Chromium(II) indicates Cr^2+ ion. Nitrate is NO3^- with a -1 charge. To balance the +2 charge of chromium, two nitrate ions are needed, giving the formula Cr(NO3)2. Parentheses are required around NO3 to show two complete nitrate groups.