AP Chem Stoic without a Calc tips?

Pre-College Issues High School Life
1

<p>So I am taking AP Chem this year and right now we are reviewing Stoichiometry. I understand all of it and I know how to set up all the problems. </p>

<p>I just have trouble doing the arithmetic without a calculator. Especially since most things in chemistry (masses, moles etc.) aren't nice numbers. That's not to say that I am bad at math. In fact I am extremely good at math, just not great at arithmetic.</p>

<p>So for those that have taken the AP Chem exam, do you have any tips for doing Stoic without a calculator. Thanks</p>

2

<p>It all depends on the amount of sigfigs you need and how strict your teacher is on them. Other than that, I have to say, if you can’t acquire a calculator, guesstimate.</p>

3

<p>Well I’m mainly referring to the multiple choice section. We have a Stoic test in a few days and there will about 19 MC questions in 25 minutes. On the review I understood how to do all of them. The only problem is that without a calculator, I am really slow at solving them.</p>

4

<p>Well then, my suggestion is to take down the answers to the fastest numbers you can multiply. Keep them relatively small.</p>

5

<p>My idea is too roughly round the numbers. Like oxygen 15.99 = 16.
Ask how accurate he wants the numbers. I’d screw the decimals and round to the nearest whole number.</p>

<p>It would be terrible if he wanted sig figs! Imagine like: 16.021 x 57.783. Three decimal places without a calculator!</p>

6

<p>O__o How are you supposed to do that kind of Stoic without a calculator? I’d assume the MC questions will be blatantly obvious if you can “guestimate” something like aStyle’s example calculation…but…dang…</p>

7

<p>what would an AP Chem Stoic look like?</p>

8

<p>AP Chem doesn’t allow a calculator for the MC part, and after the first 55 minutes of the FRQ.</p>

9

<p>Here are some arithmetic examples from Stoic MC review in my 5 steps to a 5. </p>

<p>(45.2*.12)/40</p>

<p>63/55</p>

<p>.0625/.047</p>