For every action there is an opposite and equal reaction. Your foot pushes on the boat and the boat pushes against the water which doesn't have much friction, so the boat moves backward instead of you moving forward. On land, the land pushes back up at you with the same force so you move forward.
Answer:
(It's C)
Solid particles become evenly dispersed among liquid particles.
Explanation:
Just did the quiz on Edgenuity 2020
Answer A
Chlorine is usually prepared by electrolysis of molten NaCl or by electrolysis of brine.
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Answer:
1.14kg of chalcopyrite
Explanation:
In 1 mole of chalcopyrite, CuFeS₂, there is 1 mole of Cu. Thus, to solve this question we need to convert the mass of pure Cu to moles using molar mass (Cu = 63.546g/mol). Then, the moles of Cu are equal to moles of chalcopyrite that must be converted to grams and then to kg (CuFeS₂: 183.54g/mol)
<em>Moles Cu:</em>
395g Cu * (1mol / 63.546g) = 6.216 moles Cu = 6.216 moles CuFeS₂
<em>Mass chalcopyirite:</em>
6.216 moles CuFeS₂ * (183.54g/mol) = 1140.9g
<em>In kilograms:</em>
1140.9g * (1kg / 1000g) =
<h3>1.14kg of chalcopyrite</h3>
Answer:
The protonated form is predominant when aspirin is absorbed more readily. The ratio of conjugate base to acid is 1 to 100.
Explanation:
Aspirin is more readily absorbed when it is protonated, that is when pH is lower than pKa (<em>more H⁺ available in the medium</em>). We can confirm this using Henderson-Hasselbalch equation for pH = 1.5:
![pH = pKa +log(\frac{conjugate base}{weak acid} )\\1.5=3.5 +log(\frac{conjugate base}{weak acid} )\\-2.0=log(\frac{conjugate base}{weak acid} )\\10^{-2.0} =\frac{conjugate base}{weak acid}\\\frac{conjugate base}{weak acid}=0.01=\frac{1}{100}](https://tex.z-dn.net/?f=pH%20%3D%20pKa%20%2Blog%28%5Cfrac%7Bconjugate%20base%7D%7Bweak%20acid%7D%20%29%5C%5C1.5%3D3.5%20%2Blog%28%5Cfrac%7Bconjugate%20base%7D%7Bweak%20acid%7D%20%29%5C%5C-2.0%3Dlog%28%5Cfrac%7Bconjugate%20base%7D%7Bweak%20acid%7D%20%29%5C%5C10%5E%7B-2.0%7D%20%3D%5Cfrac%7Bconjugate%20base%7D%7Bweak%20acid%7D%5C%5C%5Cfrac%7Bconjugate%20base%7D%7Bweak%20acid%7D%3D0.01%3D%5Cfrac%7B1%7D%7B100%7D)
When aspirin is absorbed more readily the ratio of conjugate base to acid is 1 to 100, being the acid the <em>predominant</em> form.