Question : 1.              When one molecule of propane, C3H8, burns in a : 1335438

1.              When one molecule of propane, C3H8, burns in a gas grill, it combines with five oxygen molecules to form three CO2 molecules and four H2O molecules.  Select the statement below that is incorrect in regard to this reaction.

A)The balanced equation for the reaction is C3H8 + 5O2 ? 3CO2 + 4H2O.

B)If five propane molecules react, 15 CO2 molecules will be formed.

C)If five propane molecules react, 25 O2 molecules must also react.

D)If 15 O2 molecules react, 9 H2O molecules will be formed.

E)If 12 CO2 molecules are formed, then four propane molecules must have reacted.

 

2.              When ethanol, C2H5OH, a component in some gasoline mixtures, is burned in air, one molecule of ethanol combines with three oxygen molecules to form two CO2 molecules and three H2O molecules.  Select the statement below that is incorrect in regard to this reaction.

A)The balanced equation for the reaction is C2H5OH + 3O2 ? 2CO2 + 3H2O.

B)If four ethanol molecules react, eight CO2 molecules will be formed.

C)If 12 H2O molecules are formed, then nine O2 molecules must have reacted.

D)If  15 ethanol molecules react, then 45 oxygen molecules must also react.

E)If 12 CO2 molecules are formed, then 18 H2O molecules will also be formed.

 

3.              When acetylene, C2H2, a fuel used in welding, is burned in air, two molecules of acetylene combine with five oxygen molecules to form four CO2 molecules and two H2O molecules.  Select the statement below that is incorrect in regard to this reaction.

A)The balanced equation for the reaction is 2C2H2 + 5O2 ? 4CO2 + 2H2O.

B)If eight acetylene molecules react, 12 CO2 molecules will be formed.

C)If 12 H2O molecules are formed, then 30 O2 molecules must have reacted.

D)If 12 CO2 molecules are formed, then six H2O molecules will also be formed.

E)If  24 ethanol molecules react, then 60 oxygen molecules must also react.

 

4.              All of the following may change during a chemical reaction except

A)the total number of atoms in the system.

B)the temperature of the system.

C)the color of the system.

D)the total number of molecules in the system.

E)the physical state of the system.

 

5.              When sodium sulfate, Na2SO4, dissolves in water, the ions that are formed for each formula unit that dissolves are:

A)Na22+(aq) + SO42?(aq)D)Na22+(aq) + S(s) + O42?(aq)

B)2Na2+(aq) + SO42?(aq)E)Na22+(aq) + S2?(aq) + 4O2?(aq)

C)2Na+(aq) + SO42?(aq)

 

6.              When potassium carbonate, K2CO3, dissolves in water, the ions that are formed for each formula unit that dissolves are:

A)K22+(aq) + CO32?(aq)D)2K+(aq) + C(s) + O32?(aq)

B)2K2+(aq) + CO32?(aq)E)K22+(aq) + C4+(aq) + 3O2?(aq)

C)2K+(aq) + CO32?(aq)

 

7.              When ammonium carbonate, (NH4)2CO3, dissolves in water, the ions that are formed for each formula unit that dissolves are:

A)(NH4)22+(aq) + CO32?(aq)

B)2NH4+(aq) + CO32?(aq)

C)2N3?(aq) + 4H+(aq) + CO32?(aq)

D)2N3?(aq) + 4H+(aq) + C(s) + O32?(aq)

E)2N3?(aq) + 4H+(aq) + C4+(aq)+ 3O2?(aq)

 

8.              Which of the following is the best balanced equation to represent the chemical reaction exactly as shown in the figure?

A)4A + 8B ? 12ABD)A2 + B2 ? AB2

B)2A2 + 4B2 ? 4A2BE)A2 + 2B2 ? 2AB2

C)2A2 + 4B2 ? 4AB2

 

9.              Which of the following is the best (simplest) balanced equation to represent the chemical reaction shown in the figure on any scale?

A)16H + 10O ? 16H + 10OD)2H2 + O2 ? 2H2O

B)16H + 10O ? 8H2O + O2E)4H2 + 2O2 ? 4H2O

C)8H2 + 5O2 ? 8H2O + O2

 

10.              Which of the following is the best (simplest) balanced equation to represent the chemical reaction shown in the figure on any scale?

A)12N + 12H ? 12NHD)12N + 12H ? 4NH3 + 8N

B)6N2 + 6H2 ? 4NH3E)N2 + 3H2 ? 2NH3

C)6N2 + 6H2 ? 4NH3 + 4N2

 

 

Page 1

Place your order
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more