Certified Transport Registered Nurse Certification Practice Exam

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Prepare for the Certified Transport Registered Nurse Test. Use flashcards and multiple choice questions with hints and explanations. Equip yourself for success in your certification exam!

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What percentage of room air is composed of oxygen according to Dalton's Law?

The correct answer is: 28%

The correct percentage of room air composed of oxygen, according to Dalton's Law, is 21%. Dalton's Law states that in a mixture of gases, the total pressure is the sum of the partial pressures of each individual gas. In the context of room air, the composition is primarily nitrogen (about 78%) and oxygen (approximately 21%), with trace amounts of other gases such as argon and carbon dioxide. The significance of understanding gas composition is crucial for healthcare professionals, especially those in transport nursing, as patients may be receiving supplemental oxygen. An accurate grasp of the typical oxygen concentration in room air (21%) helps inform the need for adjustments in oxygen therapy and patient assessments during transport. The other percentage options (30%, 24%, and 28%) are not supported by standard atmospheric compositions and do not reflect the actual compositions of air as understood in the context of both environmental science and medical care.