do significant figures matter on the ap chemistry exam?

Test Preparation AP Test Preparation
1

<p>Hi,
I was wondering:
do significant figures matter on the ap chemistry exam?</p>

<p>Thanks!</p>

2

<p>I don’t think it matters at all. Just round to 2 or 3 decimal places and you’ll be fine in most cases.</p>

3

<p>took it last year… Sig Figs do matter on the free response. A part of the scoring key will say 1 point for correct sig figs</p>

4

<p>i heard from my ap chem teacher that sig figs are being deemphasized this year.</p>

5

<p>Last year, you could have +/- 1 sig fig in the final answer than the given variable with the lowest # of sig figs. </p>

<p>So if you had a problem with 8135 moles of nitrous oxide, a 35.1 M HCl solution, and 7.1x10^8 degrees celcius, and the answer was 93432 seconds, you would have to round that to 1-3 sig figs, since 7.1x10^8 degrees only has 2 sig figs. Correct answers would include 93000 seconds (two sig figs), 90000 seconds (one less sig fig), or 93400 seconds (one more sig fig). Otherwise, you’d lose a point on the problem.</p>

6

<p>Sig figs count on the AP Chem test (you need to be within in 1 sig fig; see above post for an examples). For AP Calc, decimal answers always get 3 decimal places, no matter how many sig figs. And for AP Physics, 2 to 3 decimal places is fine; sig figs don’t matter there.</p>

7

<p>ok, thanks!!! :)</p>