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Round each number to four significant figures. 427801 kg
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roddas001

by roddas001 at October 11, 2010

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427800
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Stoichiometry Stoichiometry October 12, 2010

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easy, 428000 :) you get this because you want FOUR significant figures, so we leave the 42 alone, and look at "7801" 801 is more than 500(obviously) so we round that up to the nearest thousand so, we have 427900.
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Death Death October 12, 2010

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427800 kgThe zeros are not significant, so you just plug in this value to get 4 sig figs (look specifically at the non-zero digits in the number)
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yankeekid yankeekid October 12, 2010

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427800
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singh singh October 15, 2010

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427800
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heroefan heroefan October 17, 2010

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