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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​

Sagot :

Spaceidn

Answer:

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

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:                                                                                                       [tex]\displaystyle 4 \ mol \ H_2O(\frac{6.022 \cdot 10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O})[/tex]
  2. [DA] Multiply [Cancel out units]:                                                                    [tex]\displaystyle 2.4088 \cdot 10^{24} \ molecules \ H_2O[/tex]
Takeyaflowers41idn

Answer:

A

Explanation:

thank the guy above me and thanks for helping

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