# ) A rigid and sealed cylinder contains 0.250 mol of helium gas, 0.500 mol of neon gas, and 0.150 mol of nitrogen gas. The total pressure inside the…

1.) A rigid and sealed cylinder contains 0.250 mol of helium gas, 0.500 mol of neon gas, and 0.150 mol of nitrogen gas. The total pressure inside the cylinder is 9.0 atm. Helium has a partial pressure of:

A: 0.250 atm

B: 0.300 atm

C: 3.00 atm

D: 2.50 atm

E: 5.00 atm

2.) How many moles of oxygen gas are needed to produce 67.2 L of H2O (g) at STP in the presence of excess hydrogen?

2H2 (g) + O2 (g) = 2H2O (g)

A: 3.0 mole

B: 6.0 mole

C: 1.5 mole

D: 1.0 mole

E: 4.0 mole

3.) A gaseous solution contains 0.40 mol Ar, 1.20 mol He, and 0.40 mol Ne. What is the mole fraction of He in the mixture?

A: 0.120

B: 1.20

C: 0.333

D: 0.60

E: 0.80

4.) A chemist places 2.5 moles of Cl2 (g) and 2.0 moles of HI (g) in a sealed 2.0 L vessel where the following reaction goes to completion at 25 C:

2HI (g) + Cl2 (g) = 2HCl (g) + I2 (s)

Which of the following substitutions will give the value for the total pressure in the cylinder?

A: [(3.5)(0.0821)(298)]/2.0

B: [(4.5)(0.0821)(298)]/2.0

C: [(4.5)(0.0821)(25)]/2.0

D: [(3.5)(8.314)(298)]/2.0

E: [(2.0)(0.0821)(298)]/2.0

## 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:
Number of pages
Urgency
Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
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.

### 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.

### 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.