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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the closeness of a measurement to its actual value is a measure of its? A. precision B. accuracy.

Weegy: The closeness of a measurement to its actual value is a measure of its B. accuracy. (More)

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Asked 9/30/2011 12:09:10 PM

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Express the sum of 5762.7 and 67.2 to the correct number of significant digits.
A. 5829.9
B. 5830
C. 583 × 101
D. 5.83 × 103

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Asked 9/30/2011 12:41:38 PM

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A. 2500 km
B. 2550 km
C. 2550. km
D. 2555 km

Weegy: Express the sum of 2222 km and 333 km using the correct number of significant digits. D. 2555 km User:
Express the sum of 5762.7 and 67.2 to the correct number of significant digits.
A. 5829.9
B. 5830
C. 583 × 101
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Asked 9/30/2011 12:36:44 PM

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Sulfur dioxide is _____ compound.
A. not a
B. an ionic
C. a diatomic
D. a molecular

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Asked 9/30/2011 2:52:57 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

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ArslanBasit

Ca2+ has 18 electrons. This is correct.

Added 10/1/2011 2:44:26 PM