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Author Question: The half-life of 131I is 0.220 years. How much of a 500.0 mg sample remains after 24 hours? A) ... (Read 145 times)

WWatsford

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on: Aug 27, 2018
The half-life of 131I is 0.220 years. How much of a 500.0 mg sample remains after 24 hours?
 
  A) 496 mg
  B) 560 mg
  C) 219 mg
  D) 405 mg
  E) 337 mg

Question 2

The vapor pressure of pure ethanol at 60 C is 0.459 atm. Raoult's Law predicts that a solution prepared by dissolving 10.0 mmol naphthalene (nonvolatile) in 90.0 mmol ethanol will have a vapor pressure of ________ atm.
 
  A) 0.498
  B) 0.413
  C) 0.790
  D) 0.367
  E) 0.0918


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JaynaD87

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Reply #1 on: Aug 27, 2018
Answer to Question 1

A

Answer to Question 2

B


WWatsford

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Reply 2 on: Aug 27, 2018
Excellent

epscape

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Reply 3 on: Yesterday
Gracias!

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