This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Hard water contains excessive amounts of ________. A) fluoride ions B) calcium ions C) water ... (Read 99 times)

jwb375

  • Hero Member
  • *****
  • Posts: 540
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


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

momo1250

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Aug 27, 2018
Answer to Question 1

E

Answer to Question 2

D


jwb375

  • Member
  • Posts: 540
Reply 2 on: Aug 27, 2018
Great answer, keep it coming :)

skipfourms123

  • Member
  • Posts: 343
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

The discovery of aquaporins, water channels made of a transmembrane protein. The discovery of aquaporins, water channels made of a transmembrane protein.
This lithograph by Currier and Ives gives an erroneous impression of the “battle.” Major Robert Ande This lithograph by Currier and Ives gives an erroneous impression of the “battle.” Major Robert Ande
Claude Monet, Water Lilies, Morning: Willows (central section and right side). Claude Monet, Water Lilies, Morning: Willows (central section and right side).
Calcium balance. Calcium balance.
A single overhead camshaft engine with a timing belt that also rotates the water pump. A single overhead camshaft engine with a timing belt that also rotates the water pump.
Planet Earth compared to all its water and air! Planet Earth compared to all its water and air!
Video: Bipolar Disorder

For a complete list of videos, visit our video library