A Mixture of N₂,O₂ and He Have Mole Fractions of 0.25,0.65,and

question 72

Multiple Choice

A mixture of N₂,O₂ and He have mole fractions of 0.25,0.65,and 0.10,respectively.What is the pressure of N₂ if the total pressure of the mixture is 3.9 atm?

• A) 2.5 atm
• B) 0.39 atm
• C) 0.67 atm
• D) 0.98 atm
• E) 1.33 atm

---

Definitions:

Reagents

Additives or chemical entities added to a system aimed at causing a chemical reaction or to examine the possibility of a reaction occurring.

Synthesis

The process of combining simpler substances chemically to form a new, more complex substance.

Sulfonium Salts

Ionic compounds that contain a positively charged sulfur atom directly bonded to three organic groups.

SAM

S-Adenosylmethionine, a compound involved in methyl group transfers in biological processes.