AP Chemistry questions

Pre-College Issues High School Life
1

<p>Hi I'm self-studying the test and have a few questions...</p>

<p>1: In the free-response portion, how do we show that we haven't done intermediate rounding without violating significant figure conventions?</p>

<p>2: To how many places to the right of the decimal should we use when using atomic masses? Like, 1.008 or 1.01 for hydrogen?</p>

2

<p>While I cannot comment on the exact policies of AP Exam, I can give you the general sig fig rules:</p>

<ol>
<li>Significant figures only matter for the final number.</li>
<li>Use the most accurate numbers possible unless told to do otherwise. Thus, use 1.008 unless told to use 1.01.</li>
</ol>