<p>It’s on the MC sometimes, but they expect you to know that half-life is just 1st order kinetics, so you have to use the first order integrated rate law.</p>
<p>ln(A)[at a specific time] = -kt + A(initial)</p>
<p>But on the MC, since you don’t use a calculator, the math is REALLY basic and you can honestly just count “how many half lives” have passed without using an equation.</p>
<p>^Ah, I see. That makes sense. </p>
<p>Thanks for your help :]</p>
<p>T.T im self studying and it’s so harrrrrrrrrrrd!!!</p>
<p>What’s ur guys’ weakest part</p>
<p>i gusss mine’s redox</p>
<p>lol</p>
<p>ohhhh</p>
<p>and i don’t get descriptive chemistry at all!!!</p>
<p>my tutor’s telling me to only focus on sections like</p>
<p>acid and base and solution</p>
<p>how should i prepare for descriptive chemistry within a week???</p>
<p>redox isnt that bad but i hate enthalpy and thermodynamics. </p>
<p>and our teacher is making us do 17-20 & 22 by ourselves and is making us take a test this friday. is this normal?</p>