A gaseous mixture of O2 and N2 contains 30.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 725 mmHg ?Express you answer numerically in millimeters of mercury.View Available Hint(s)ΑΣφ502PoxygenmmHgохуgPrevious AnswersSubmitIncorrect; Try Again; 3 attempts remainingYour answer would be correct if the given percentage was "by moles." Since the given percentage is "by mass," you will have to calculate the molesand the mole fraction.You may want to review Hint 1. How to approach the problem.

Question
Asked Nov 1, 2019
329 views
A gaseous mixture of O2 and N2 contains 30.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 725 mmHg ?
Express you answer numerically in millimeters of mercury.
View Available Hint(s)
ΑΣφ
502
Poxygen
mmHg
охуg
Previous Answers
Submit
Incorrect; Try Again; 3 attempts remaining
Your answer would be correct if the given percentage was "by moles." Since the given percentage is "by mass," you will have to calculate the moles
and the mole fraction.
You may want to review Hint 1. How to approach the problem.
help_outline

Image Transcriptionclose

A gaseous mixture of O2 and N2 contains 30.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 725 mmHg ? Express you answer numerically in millimeters of mercury. View Available Hint(s) ΑΣφ 502 Poxygen mmHg охуg Previous Answers Submit Incorrect; Try Again; 3 attempts remaining Your answer would be correct if the given percentage was "by moles." Since the given percentage is "by mass," you will have to calculate the moles and the mole fraction. You may want to review Hint 1. How to approach the problem.

fullscreen
check_circle

Expert Answer

star
star
star
star
star
1 Rating
Step 1

Given,

Total pressure of the mixture = 725 mmHg

Gaseous mixture of O2 and N2 contains mass % of N2 = 30.8 %

This means that in total 100 g of the mixture, there is 30.8 g of N2.

⸫ Mass of O2 = 100 g – 30.8 g = 69.2 g

Step 2

Moles of O2 and N2 can be calculated as:

help_outline

Image Transcriptionclose

69.2 g Mass Mole of O2 2.1625 mol Molar mass 32 g/mol 30.8 g Mass Mole of N2 1.1 mol Molar mass 28 g/mol Total moles 2.1625 mol + 1.1 mol = 3.2625 mol

fullscreen
Step 3

Mole fraction of O2 can be c...

help_outline

Image Transcriptionclose

Moles of O2 2.1625 mol Mole fraction of O2 0.663 3.2625 mol Total moles

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Chemistry

General Chemistry

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: Dry ice is solid carbon dioxide. Instead of melting, solid carbon dioxide sublimes according to the ...

A: Dry ice sublimation is:

question_answer

Q: 1. Acetate buffers are used in biochemical studies of enzymes and other chemical components of cells...

A: The Ka value of acetic acid is 1.8 × 10-5.pKa = -log(Ka) = -log(1.8 × 10-5) = 4.74.concentration of ...

question_answer

Q: Analyzing a mixture of salts with differing cations and/or anions can be far more complicated than a...

A: Click to see the answer

question_answer

Q: How m any grams of dextrose are in 1200 mL of a 5% D5W solution?

A: 5% D5W solution implies that 5g of dextrose (solute) is present in 100mL of the solution.

question_answer

Q: What mass of Ca(OH)2 is required to neutralize 50.00mL of 0.180 M HCI?

A: Balanced chemical equation for the reaction between hydrochloric acid and calcium hydroxide is,

question_answer

Q: Saved Be sure to answer all parts. Name the following compound according to substitutive IUPAC nomen...

A: The IUPAC nomenclature of given compound is:4,5 dimethyl Hexan-2-ol

question_answer

Q: A sample of phosphorus weighing 2.50 grams is burned in the presence of oxygen. What is the empirica...

A: Given:Mass of phosphorus = 2.50 g.Mass of phosphorus oxide compound = 5.73 g.Mass of oxygen = Mass o...

question_answer

Q: Chemistry Question

A: Given that,Mass of acetic acid = 0.1 MVolume of acetic acid= 25mLMass of KOH = 0.1 M

question_answer

Q: You have 15.31 g of an unknown compound. Through analysis, you have determined that this sample cont...

A: Mass percent can be calculated as follows: