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Sagot :
Answer:
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
- Moles
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
Stoichiometry
- Using Dimensional Analysis
Explanation:
Step 1: Define
[Given] 1.4 moles H₃PO₄
[Solve] atoms H₃PO₄
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
- [DA] Set up: [tex]\displaystyle 1.4 \ mol \ H_3PO_4(\frac{6.022 \cdot 10^{23} \ atoms \ H_3PO_4}{1 \ mol \ H_3PO_4})[/tex]
- [DA] Multiply [Cancel out units]: [tex]\displaystyle 8.4308 \cdot 10^{23} \ atoms \ H_3PO_4[/tex]
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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