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Author Question: The half-life of 222Rn is 3.80 days. If a sample contains 36.0 g of Rn-222, how many years will it ... (Read 77 times)

kaid0807

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  • Posts: 515
on: Aug 27, 2018
The half-life of 222Rn is 3.80 days. If a sample contains 36.0 g of Rn-222, how many years will it take for the sample to be reduced to 1.00 mg of Rn-222?
 
  A) 19.7
  B) 0.1597
  C) 8.53
  D) 0.0234
  E) none of the above

Question 2

What is the concentration (M) of 39.88 mL of an unknown NaOH solution if it required 46.08 mL of 0.6592 M HCl to neutralize?
 
  A) 0.7617
  B) 2788
  C) 1211
  D) 1.313
  E) 1.211


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spencer.martell

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

B

Answer to Question 2

A


kaid0807

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Reply 2 on: Aug 27, 2018
YES! Correct, THANKS for helping me on my review

shewald78

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  • Posts: 340
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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