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Author Question: There are ________ hydrogen atoms in 25 molecules of C4H4S2. A) 25 B) 3.8 1024 C) 6.0 1025 ... (Read 197 times)

bb

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on: Aug 27, 2018
There are ________ hydrogen atoms in 25 molecules of C4H4S2.
 
  A) 25
  B) 3.8  1024
  C) 6.0  1025
  D) 100
  E) 1.5  1025

Question 2

The LD50 value is the amount of a substance that will kill 50 of test animals.
 
  Indicate whether the statement is true or false


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xiaomengxian

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

D

Answer to Question 2

TRUE


bb

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Reply 2 on: Aug 27, 2018
Gracias!

diana chang

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

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