Jina Kwon
Posts: 100
Joined: Fri Aug 09, 2019 12:15 am

For one question I got the answer 13.8, but the answer is 13.5. Will I be docked off a lot of points for this?

Jacey Yang 1F
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

I think you will be docked off a little since it is off in the 0.1 decimal place, which is far off and probably a result of rounding too early on in the problem. We need to be as precise as possible when solving chemistry problems, so only round to the correct number of sig figs when you reach the final answer.

Robert Tran 1B
Posts: 118
Joined: Thu Jul 11, 2019 12:15 am

I'm not sure if points will be deducted for this, but the way you can avoid this error is by storing all calculated values in your calculator until the final value is reached. If you round the values before the final step, you may obtain an error in your final calculation.

905385366
Posts: 54
Joined: Sat Jul 20, 2019 12:16 am

I am not sure about grading, but rather use unrounded values until the end to ensure you come out with the correct answer. Your answer may be a tad off because you may have been using rounded values throughout.

Minh Ngo 4G
Posts: 137
Joined: Thu Jul 25, 2019 12:17 am

You probably have that answer due to the fact that you round every time. Don't round every time. As in grading, probably cause it is kinda significant but i don't think much tho.

Kavee Dodampahala 4E
Posts: 51
Joined: Sat Jul 20, 2019 12:17 am

I remember my TA saying that you should have the exact answer if a problem was done correctly so you would get a point off if it was a little off.

Megan Vu 1J
Posts: 101
Joined: Thu Jul 25, 2019 12:15 am

For this, make sure you check with the other parts of your equation as well. For example, the book uses 6.022 x 10^23 as Avogadro's constant, and many students may only use 6.02 x 10^23. Or, in another example, the book also uses more values for elements under the periodic table, whereas Professor Lavelle placed 4 significant figures on the molar mass of each element.

It is also better to take the full number and round off at the very end as the last step to get the most precise answer.

PriscillaLi_3G
Posts: 63
Joined: Fri Sep 27, 2019 12:30 am

How far off is too far off?

Shail Avasthi 2C
Posts: 101
Joined: Fri Aug 30, 2019 12:17 am

Try to avoid rounding the numbers you use for your calculation, and only round at the end of the problem. Excess rounding while solving a problem leads to significant discrepancies between your answer and the correct answer.

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