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Question 1 of 7
1. Question
1 point(s)Which of the followings is the formula of calcium hydroxide ion?
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Question 2 of 7
2. Question
1 point(s)Which of the followings is the formula of ammonium nitrate?
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Question 3 of 7
3. Question
1 point(s)X reacts with bromine to form a bromide compound with the formula XBr₂. A possible molecular formula for the compound of X sulphate is
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Question 4 of 7
4. Question
1 point(s)Which of the following is true about the molecular formula of a compound?
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Question 5 of 7
5. Question
1 point(s)In an experiment, 21g of lithium combined with exactly 14g of nitrogen. Find the empirical formula of lithium nitride. (Relative atomic masses: Li = 7 and N = 14)
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Question 6 of 7
6. Question
1 point(s)A hydrocarbon X contains 86% of carbon by mass. Which of the followings are the possible molecular formulas of X?
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Question 7 of 7
7. Question
1 point(s)Given that the empirical formula of cyclo-hexene is C₃H₅. Which of the following are the possible molecular formula of cyclo-hexene?
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