Is air a mixture, compound, or element?
The air we breathe is a mixture….
.of dinitrogen, dioxygen, a tiny amount of carbon dioxide, and a few other gases. You'll need to check the mixture's proportions.
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Air is a mixture composed primarily of nitrogen (about 78%) and oxygen (about 21%), along with trace amounts of other gases such as argon, carbon dioxide, and various pollutants.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
- Are neutrons inside or outside the nucleus?
- How do we determine the number of neutrons given #Z#, and a #"mass number"#?
- Nitrogen has two isotopes, N-14 and N-15, with atomic masses of 14.00031 amu and 15.001 amu, respectively. What is the percent abundance of N-15?
- What is the atomic number of O?
- Oxygen molecule is ______ times heavier than Helium molecule? (A) 2 (B) 4 (C) 8 (D) 16

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