<ul>
<li>by the way gravity woud affect it on the way UP after hitting the ground</li>
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<p>As best as I can tell, it seems it was air resistance because the air resistance provides the resistive force on the ball proportional to the weight force (mass x gravity) and as mass changes (with different densities), the weight force would changes thereby changing the air resistance. And withe the change in ressistive force, you’d have a change in final acceleration and velocity with which the balls hit the ground which would very much change the heights of rebound.</p>
<p>This is all speculation though, I didn’t take the test</p>
<p>I would like the end the dispute over the titration one: the more moles added to the item being titrated, the more moles needed to titrate it. This is because titrations deal with mole-to-mole ratios.</p>
<p>^Umm no, you are wrong, as confirmed by three of my friends who got 5’s on AP chem. If the molarity is doubled, that means the number of mols is doubled, so it will require <em>LESS</em> mols to reach equilibrium with the base.</p>
<p>“the more moles added to the item being titrated, the more moles needed to titrate it”</p>
<p>The question stated that the molarity of the titrant was increased, not acid’s.</p>
<p>It was less and Greenmamba is wrong</p>