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Author Question: The term "proof" is defined as twice the percent by volume of pure ethanol in solution. Thus, a ... (Read 47 times)

dmcintosh

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on: Mar 21, 2021

Question 1

The solubility of O2 in water is 0.590 g/L at an oxygen pressure of around 15.5 atm. What is the Henry's law constant for O2 (in units of mol/L·atm)?

◦ 3.81 × 10–2
◦ 1.19 × 10–3
◦ 8.41 × 102
◦ 2.86 × 10–1
◦ None of these are within 5% of the correct answer.

Question 2

The term "proof" is defined as twice the percent by volume of pure ethanol in solution. Thus, a solution that is 95% (by volume) ethanol is 190 proof. What is the molarity of ethanol in a 92 proof ethanol/water solution?
 
density of ethanol
= 0.80 g/cm3
 
density of water
= 1.0 g/cm3
 
mol. wt. of ethanol
= 46 g/mol
 


◦ 0.46 M
◦ 0.80 M
◦ 0.92 M
◦ 8.0 M
◦ 17 M
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Marked as best answer by dmcintosh on Mar 21, 2021

Laurenleakan

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Reply #1 on: Mar 21, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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dmcintosh

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Reply 2 on: Mar 21, 2021
Great answer, keep it coming :)

frankwu0507

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Reply 3 on: Yesterday
Gracias!

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