Question

How many moles are in 6.5e23 atoms of Ne?

Answer 1

1.1 mol Ne

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Chemistry

Atomic Structure

• Moles

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

Stoichiometry

• Using Dimensional Analysis

Step-by-step explanation:

Step 1: Define

[Given] 6.5 × 10²³ atoms Ne

[Solve] moles Ne

Step 2: Identify Conversion

Avogadro's Number

Step 3: Convert

1. [DA] Set up:
   `\displaystyle 6.5 \cdot 10^(23) \ atoms \ Ne((1 \ mol \ Ne)/(6.022 \cdot 10^(23) \ atoms \ Ne))`
2. [DA] Divide [Cancel out units]:
   `\displaystyle 1.07938 \ mol \ Ne`

Step 4: Check

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

1.07938 mol Ne ≈ 1.1 mol Ne