The 3 components of air

Chemistry

2 answers:

jok3333 [9.3K]3 years ago

8 0

Nitrogen (around 78%), Oxygen (around 21%), and Argon (around 1%).

Hope this helps :)

Lady bird [3.3K]3 years ago

7 0

The Main 3 components are Nitrogen, Oxygen, and Argon.

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How many atoms are in a 1.8 mol sample of Magnesium (Mg)?

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Answer:

1.1 × 10²⁴ atoms Mg

General Formulas and Concepts:

Atomic Structure

Moles
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional Analysis

Explanation:

Step 1: Define

Identify

[Given] 1.8 mol Mg

[Solve] atoms Mg

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[DA] Set up: $\displaystyle 1.8 \ mol \ Mg(\frac{6.022 \cdot 10^{23} \ atoms \ Mg}{1 \ mol \ Mg})$
[DA] Multiply [Cancel out units]: $\displaystyle 1.08396 \cdot 10^{24} \ atoms \ Mg$