Homework Help: Chemistry-sig figs

Posted by Rebekah on Sunday, August 22, 2010 at 2:22pm.

Each of the following numbers was supposed to be rounded to two significant figures. For each one below, decide whether it was correctly rounded or not, and for those that were incorrectly rounded, correct them

(a) 1.249 X 10 to the 3rd power. They said it rounded to 1.3 X 10 to the third power.

Im pretty sure this is correct but i only have one submission and i need help:)

thanks

Chemistry-sig figs - bobpursley, Sunday, August 22, 2010 at 2:25pm
No it is not correct. 0.049 does not round up to 0.1
Chemistry-sig figs - Rebekah, Sunday, August 22, 2010 at 2:27pm
where did you get 0.049?
Chemistry-sig figs - bobpursley, Sunday, August 22, 2010 at 2:31pm
Look at the last two digits of your problem. 0.249 does not round up to 0.3
Chemistry-sig figs - Rebekah, Sunday, August 22, 2010 at 3:29pm
oh so is it incorrect and the answer is 1.2 or is it 1.20? does the second answer have 3 sig figs?
Chemistry-sig figs - ernest, Sunday, August 22, 2010 at 4:09pm
why does KMnO4 act as self indicator in titration invoulving KMnO4?
Chemistry-sig figs - Rebekah, Sunday, August 22, 2010 at 4:12pm
ernest y did u post that on my question? it doesn't ever pertain to my question

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