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例子问题ns
例子问题n #1 :Help With Polyatomic Ions
Which of the following polyatomic ions has a net charge of?
Possible Answers:
Correct answer:
Explanation:
For this question, you need to have the charges of polyatomic ions memorized. This will tell you that of the answer choices only the carbonate ion has a net charge of.
Chlorate:
Nitrite:
Phosphate:
Carbonate:
例子问题n #2 :Help With Polyatomic Ions
When the ionic compoundis put in water, it dissociates to produce which of the following ions?
Possible Answers:
Correct answer:
Explanation:
andare known as polyatomic ions. When a compound made up of polyatomic ions ionizes in water, it separates into the original polyatomic ions, not the individual elements.
例子问题n #3 :Help With Polyatomic Ions
What is the correct molecular formula for phosphoric acid?
Possible Answers:
None of the answer choices are correct
Correct answer:
Explanation:
Phosphoric acid combines a single phosphate ion with three hydrogen ions. The correct molecular formula is.
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