Question

Given 1.67 moles of K, how many moles of KBr are produced?
2 K+ 1 Br2---> 2 KBr

Answer 1

Answer:

$\displaystyle 1.67 \ mol \ KBr$

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

Stoichiometry

• Using Dimensional Analysis
• Analyzing Reactions RxN

Explanation:

Step 1: Define

[RxN - Balanced] 2K + Br₂ → 2KBr

[Given] 1.67 moles K

[Solve] moles KBr

Step 2: Identify Conversions

[RxN] 2 mol K → 2 mol KBr

Step 3: Stoichiometry

1. [DA] Set up conversion:                                                                                 $\displaystyle 1.67 \ mol \ K(\frac{2 \ mol \ KBr}{2 \ mol \ K})$
2. [DA] Multiply/Divide [Cancel out units]:                                                         $\displaystyle 1.67 \ mol \ KBr$