Question

How many molecules are in 4 moles of H20? A. 2.408 x 10^24

B. 2.408 x 10^23
C. 6.02 x 10^24
D. 7.224 x 10^24​

Answer 1

A

Step-by-step explanation:

thank the guy above me and thanks for helping

Answer 2

A. 2.408 × 10²⁴

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] 4 moles H₂O

[Solve] molecules H₂O

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

1. [DA] Set up:
   `\displaystyle 4 \ mol \ H_2O((6.022 \cdot 10^(23) \ molecules \ H_2O)/(1 \ mol \ H_2O))`
2. [DA] Multiply [Cancel out units]:
   `\displaystyle 2.4088 \cdot 10^(24) \ molecules \ H_2O`