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Express the product of 4.0 × 10-2 m and 8.1 × 102 m using the correct number of significant digits. A. 3.2 × 101 B. 3.24 × 101 C. 32.4 D. 30
C. 32.4 is the answer
Expert answered|migzptz|Points 2360|
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Asked 9/30/2011 1:11:10 PM
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In which of the following is number of electrons the ion contains given correctly? A. H+ has 1 electron. B. Br- has 34 electrons. C. Al3+ has 16 electrons. D. Ca2+ has 18 electrons.
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Education|No Subcategories|Not Answered
Updated 10/1/2011 2:44:26 PM
1 Answer/Comment
Ca2+ has 18 electrons. This is correct.
Added 10/1/2011 2:44:26 PM
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