How many atoms of aluminium are contained in 2.75 mol

1.66 × 10²⁴ atoms Al

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Atomic Structure

Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional AnalysisExplanation:

Step 1: Define

[Given] 2.75 mol Al

[Solve] atoms Al

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[DA] Set up:                                                                                                     [DA] Multiply [Cancel out units]:                                                                      

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

1.65605 × 10²⁴ atoms Al ≈ 1.66 × 10²⁴ atoms Al

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