How many moles are in 1.7 x 10^50 particles of Al?

2.8 × 10²⁶ moles 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

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

Stoichiometry

Using Dimensional AnalysisExplanation:

Step 1: Define

[Given] 1.7 × 10⁵⁰ particles Al

[Solve] moles Al

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

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

Step 4: Check

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

2.82298 × 10²⁶ moles Al ≈ 2.8 × 10²⁶ moles Al