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Author Question: Hard water contains excessive amounts of ________. A) fluoride ions B) calcium ions C) water ... (Read 131 times)

jwb375

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on: Aug 27, 2018
Hard water contains excessive amounts of ________.
 
  A) fluoride ions
  B) calcium ions
  C) water ions
  D) magnesium ions
  E) Two of the above are the most appropriate answers.

Question 2

What is a similarity between pesticides and medical drugs?
 
  A) They need to selectively target the invader but not harm the host.
  B) They have to have a minimum amount of side effects.
  C) They should be readily decomposed into non-harmful byproducts.
  D) all of the above
  E) only A and B


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momo1250

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

E

Answer to Question 2

D


jwb375

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Reply 2 on: Aug 27, 2018
Excellent

adf223

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Reply 3 on: Yesterday
Gracias!

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