Question

How many moles are in 8.5 x 1023 molecules of co?

Answer 1

Answer:

1.4 mol CO

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

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

Stoichiometry

• Using Dimensional Analysis

Explanation:

Step 1: Define

8.5 × 10²³ molecules CO

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

1. Set up:                    $\displaystyle 8.5 \cdot 10^{23} \ molecules \ CO(\frac{1 \ mol \ CO}{6.022 \cdot 10^{23} \ molecules \ CO})$
2. Divide:                    $\displaystyle 1.41149 \ mol \ CO$

Step 4: Check

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

1.41149 mol CO ≈ 1.4 mol CO