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Answer is a little off?

Posted: Tue Oct 01, 2019 1:04 pm
by Doris Cho 1D
Would it be fine if my final answer is off by a little? my rounding gets mixed up in the middle when I do problems and I end up with an answer that's a thousandth/hundredth of a number too high/low...
For example in the problem F1, the mass I get for hydrogen ends up as 10.58% but the answer says it as 10.59%... is this ok?

Re: Answer is a little off?

Posted: Tue Oct 01, 2019 1:15 pm
by Shivam Rana 1D
Yes this is fine; I asked my TA on Friday

Re: Answer is a little off?

Posted: Tue Oct 01, 2019 1:46 pm
by saigorijavolu2k
My answers also have been of because depending on which periodic table you use the masses are a little different and also how you round and when you round affects your answer as well.

Re: Answer is a little off?

Posted: Tue Oct 01, 2019 10:59 pm
by LBacker_2E
Yes it is okay iff your answer is off by that much. It is probably just a rounding difference or as mentioned, a difference in the molar masses used. However, if you start rounding to the number of significant figures while solving the problem, then your answers may be more off, which is why you should not worry about having the right amount of significant figures until your answer.

Re: Answer is a little off?

Posted: Wed Oct 02, 2019 3:15 pm
by Abhi Vempati 2H
@LBacker_4F put it perfectly. I'd like to add that when I'm showing my work on my paper, I like to round off in order to keep track of the number of sig figs I'll have in my final answer. However, on my calculator, I keep everything unrounded to have a more accurate answer.