Answer is a little off?

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Doris Cho 1D
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Joined: Thu Jul 11, 2019 12:16 am

Answer is a little off?

Postby Doris Cho 1D » Tue Oct 01, 2019 1:04 pm

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?

Shivam Rana 1D
Posts: 106
Joined: Fri Aug 09, 2019 12:16 am

Re: Answer is a little off?

Postby Shivam Rana 1D » Tue Oct 01, 2019 1:15 pm

Yes this is fine; I asked my TA on Friday

Posts: 108
Joined: Sat Sep 28, 2019 12:15 am

Re: Answer is a little off?

Postby saigorijavolu2k » Tue Oct 01, 2019 1:46 pm

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.

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Re: Answer is a little off?

Postby LBacker_2E » Tue Oct 01, 2019 10:59 pm

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.

Abhi Vempati 2H
Posts: 104
Joined: Fri Aug 09, 2019 12:17 am

Re: Answer is a little off?

Postby Abhi Vempati 2H » Wed Oct 02, 2019 3:15 pm

@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.

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