Helium Effuses Through a Small Opening at a Rate of 1×10^-9

question 4

Multiple Choice

Helium effuses through a small opening at a rate of 1×10^-9 mol s^-1. An unknown gas at the same temperature and pressure is found to effuse through the same opening at a rate of 3.78×10^-10 mol s^-1. What is the molecular mass of the unknown gas?

• A) 4 g mol^-1
• B) 14 g mol^-1
• C) 18 g mol^-1
• D) 28 g mol^-1
• E) 40 g mol^-1

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Definitions:

Liver

A large, vital organ in the human body that performs many essential functions related to digestion, metabolism, immunity, and the storage of nutrients within the body.

Excessive Drinking

Consumption of alcohol amounts that significantly exceed recommended guidelines and potentially lead to health problems or dependency.

Caffeine Use

The consumption of caffeine, a stimulant found in coffee, tea, chocolate, energy drinks, and certain medications, which can affect mental alertness and physical performance.

Physical Effects

The bodily changes or consequences that result from an action, condition, or disease.