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Molecules and Compounds (Grade 9)

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Molecules and Compounds

1. 
[math]HCO_3^-[/math] is named
  1. chlorite.
  2. chlorate.
  3. hydrogen sulfate.
  4. hydrogen carbonate.
 
2. 
[math]C_2O_4^(2-[/math] is named
  1. oxalate.
  2. peroxide.
  3. hydroxide.
  4. carbonate.
3. 
[math]C_2H_3O_2^-[/math] is named
  1. acetate.
  2. oxalate.
  3. hydroxide.
  4. carbonate.
 
4. 
[math]NH_4^+[/math] is named
  1. cyanide.
  2. hydroxide.
  3. hydronium.
  4. ammonium.
5. 
Which element has properties that are similar to neon?
  1. aluminum
  2. argon
  3. arsenic
  4. silver
 
6. 
How many ions are in 0.5 moles of NaCl?
  1. [math]1.204 x 10^23[/math]
  2. [math]3.011 x 10^23[/math]
  3. [math]6.022 x 10^23[/math]
  4. [math]9.033 x 10^23[/math]
7. 
What is the formula for Nitrous Acid?
  1. [math]HNO_2[/math]
  2. [math]NO_2[/math]
  3. [math]H_2NO_2[/math]
  4. [math]HNO_3[/math]
 
8. 
What is the formula for Chromium (III) Chlorate?
  1. [math]Cr_3(ClO_3)[/math]
  2. [math]CrCl_3[/math]
  3. [math]Cr(ClO_3)_3[/math]
  4. [math]Cr_2(ClO_3)[/math]
9. 
Which of the following compound does not contain a polyatomic ion?
  1. sodium carbonate
  2. sodium sulfate
  3. sodium sulfite
  4. sodium sulfide
 
10. 
Water acts as a solvent of ionic compounds because
  1. water molecules are polar.
  2. water takes the shape of its container.
  3. water is found in three states of matter.
  4. water is a liquid over a wide range of temperatures.
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