A 30-L Sample of Helium Was Placed in a Container Fitted

question 68

Multiple Choice

A 3.0-L sample of helium was placed in a container fitted with a porous membrane. Half of the helium effused through the membrane in 24 hours. A 3.0-L sample of oxygen was placed in an identical container. How many hours will it take for half of the oxygen to effuse through the membrane?

• A)8.5 h
• B)12 h
• C)48 h
• D)60. h
• E)68 h

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Definitions:

Observational Study

A study where the researcher observes and records data without influencing the outcomes.

Self-Administered Survey

A data collection method where respondents fill out the questionnaire on their own, without the direct assistance of a researcher.

Demographic Variables

Characteristics of populations used in social science research, such as age, gender, income level, marital status, ethnicity, and education level.

Packaging Preference

Consumer's or user's favoritism towards the design, material, and functionality of packaging for products.