Calculate the number of moles of nitrogen dioxide, that contain 4.0*1023 nitrogen dioxide molecule.

0.66 mol NO₂

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Atomic Structure

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

Stoichiometry

Using Dimensional AnalysisExplanation:

Step 1: Define

4.0 × 10²³ molecules NO₂ (Nitrogen dioxide)

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Set up:                                Multiply/Divide:                                                                                                  

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

0.664321 mol NO₂ ≈ 0.66 mol NO₂

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