Question

How many moles of NaHCO3 are in 2.4 x
1024 molecules of NaHCO:?

Answer 1

4.0 moles NaHCO

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] 2.4 × 10²⁴ molecules NaHCO

[Solve] moles NaHCO

Step 2: Identify Conversion

Avogadro's Number

Step 3: Convert

1. [DA] Set up:
   `\displaystyle 2.4 \cdot 10^(24) \ molecules \ NaHCO((1 \ mol \ NaHCO)/(6.022 \cdot 10^(23) \ molecules \ NaHCO))`
2. [DA] Divide [Cancel out units]:
   `\displaystyle 3.98539 \ moles \ NaHCO`

Step 4: Check

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

3.98539 moles NaHCO ≈ 4.0 moles NaHCO