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Author Question: Calculate the mole fraction of nitric acid of a 18.6 (by mass) aqueous solution of nitric acid. ... (Read 332 times)

Haya94

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on: Aug 27, 2018
Calculate the mole fraction of nitric acid of a 18.6 (by mass) aqueous solution of nitric acid.
 
  A) 0.0484
  B) 0.0508
  C) 0.0967
  D) 0.0242
  E) The density of the solution is needed to solve the problem.

Question 2

Carbon-11 is used in medical imaging. The half-life of this radioisotope is 20.4 min. What percentage of a sample remains after 50.0 min?
 
  A) 66.5
  B) 8.62
  C) 18.3
  D) 40.8
  E) 2.45
Chemistry: The Central Science ¦ Brown, LeMay, Bursten ¦ 14th Edition
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bimper21

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Reply #1 on: Aug 27, 2018
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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Haya94

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Reply 2 on: Aug 27, 2018
Gracias!

yeungji

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Reply 3 on: Yesterday
Wow, this really help

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