Problem F.1b

Moderators: Chem_Mod, Chem_Admin

Maggie Doan 1I
Posts: 61
Joined: Fri Sep 28, 2018 12:24 am

Problem F.1b

Postby Maggie Doan 1I » Thu Oct 04, 2018 3:45 pm

My calculations for the answer were off by the hundredth decimal point. For example I calculated 78.96% when the answer is 78.90%. Would I get the answer wrong?

Yvonne Du
Posts: 64
Joined: Fri Sep 28, 2018 12:23 am

Re: Problem F.1b

Postby Yvonne Du » Thu Oct 04, 2018 4:02 pm

I think as long as your answer is close enough to the book answer, TAs won't make you wrong. In this case, your answer is very close.

Emily Li 4A
Posts: 24
Joined: Fri Sep 28, 2018 12:27 am

Re: Problem F.1b

Postby Emily Li 4A » Thu Oct 04, 2018 4:09 pm

This might be from applying significant figures to the calculations made before arriving at the answer. To have a more precise result, cut off the calculations you make to four decimal places and continue to do so until you arrive at the final answer. Then apply significant figures to the latter.

You may add more decimal places to intermediary calculations as needed if the data given for the problem is especially precise.

nolansheow3G
Posts: 30
Joined: Fri Sep 28, 2018 12:26 am

Re: Problem F.1b

Postby nolansheow3G » Thu Oct 04, 2018 4:27 pm

Our TA told us that if he was grading (which he is) he would not mark us off. However, he said that if we keep the calculations running in our calculator and round at the very end, our answer should match the answer key.


Return to “Empirical & Molecular Formulas”

Who is online

Users browsing this forum: No registered users and 2 guests