Question

QUESTION 4
How many moles are in 3.2 x 1024 of CO2 molecules? (round answer to the correct number of sig figs)

Answer 1

Answer:

5.3 mol CO₂

General Formulas and Concepts:

Chemistry - Stoichiometry

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

Explanation:

Step 1: Define

3.2 × 10²⁴ molecules CO₂

Step 2: Convert

$3.2 \cdot 10^{24} \ mc \ CO_2(\frac{1 \ mol \ CO_2}{6.022 \cdot 10^{23} \ mc \ CO_2} )$ = 5.31385 mol CO₂

Step 3: Check

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

5.31385 mol CO₂ ≈ 5.3 mol CO₂