What is the normal percentage of oxygen in...

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Question 1 of 2066636ef128f7522a1c5228c9

What is the normal percentage of oxygen in air?

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What is the normal percentage of oxygen in air?

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🔍 Key Concepts

• Normal composition of dry air at sea level • Typical range of oxygen concentration needed to sustain human life • Difference between normal oxygen levels and levels considered oxygen-deficient in safety standards

💭 Think About

• Think about what percentage of air is nitrogen versus oxygen—roughly how much of the air is nitrogen, and how much is oxygen? • Consider what concentration of oxygen is usually cited in safety rules as the minimum safe level—how does that compare to normal air? • Which of the options looks most like a commonly quoted, rounded figure for oxygen in the atmosphere?

✅ Before You Answer

• Recall that nitrogen is the major component of air, so oxygen must be a smaller portion than nitrogen. • Verify which option falls in the low 20s percent range, which is typically associated with normal atmospheric oxygen. • Eliminate any choice that seems more like an oxygen-deficient environment (often cited around 19.5% or less) rather than normal air.

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Question 1 of 2066636ef128f7522a1c5228c9

What is the normal percentage of oxygen in air?

Back

Question 1 of 20

66636ef128f7522a1c5228c9

Q

What is the normal percentage of oxygen in air?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Normal composition of dry air at sea level • Typical range of oxygen concentration needed to sustain human life • Difference between normal oxygen levels and levels considered oxygen-deficient in safety standards

💭 Think About

• Think about what percentage of air is nitrogen versus oxygen—roughly how much of the air is nitrogen, and how much is oxygen? • Consider what concentration of oxygen is usually cited in safety rules as the minimum safe level—how does that compare to normal air? • Which of the options looks most like a commonly quoted, rounded figure for oxygen in the atmosphere?

✅ Before You Answer

• Recall that nitrogen is the major component of air, so oxygen must be a smaller portion than nitrogen. • Verify which option falls in the low 20s percent range, which is typically associated with normal atmospheric oxygen. • Eliminate any choice that seems more like an oxygen-deficient environment (often cited around 19.5% or less) rather than normal air.

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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