Since Air Is a Mixture,it Does Not Have a "Molar

question 46

Multiple Choice

Since air is a mixture,it does not have a "molar mass." However,for calculation purposes,it is possible to speak of its "effective molar mass." (An effective molar mass is a weighted average of the molar masses of a mixture's components.) If air at STP has a density of 1.285 g/L,its effective molar mass is ________ g/mol.

• A)26.94
• B)31.49
• C)30.00
• D)34.42
• E)28.80

---

Definitions:

Conditions Precedent

Requirements that must be met before a contract becomes effective or before certain actions can be taken.

Conditions Subsequent

Conditions that must be met after a contract has been executed in order for the contract to remain effective.

Condition Precedent

A specific event or action that must occur before a contract becomes binding or a party is required to perform their contractual obligations.

Duty

A legal or moral obligation to do or refrain from doing something.