How many atoms are in 1.4 moles of H3PO4? 8.4 X 10^23 atoms
8.9 X 10^23 atoms
8.4 X 10^23 grams
8.4 X 10^23 moles

8.4 × 10²³ atoms H₃PO₄

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] 1.4 moles H₃PO₄

[Solve] atoms H₃PO₄

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 2 sig figs.

8.4308 × 10²³ atoms H₃PO₄ ≈ 8.4 × 10²³ atoms H₃PO₄

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