Answer:
Molecules move from areas of high concentration to areas of low concentration.
A solid will start to melt when it reaches its melting point. For example the melting point of Helium is -272° Celsius and the melting point of Carbon is 3500° Celsius . Helium has the lowest melting point and carbon has the highest melting point in the periodic table.
<h3>
Answer:</h3>
18.9 g F₂
<h3>
General Formulas and Concepts:</h3>
<u>Math</u>
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Chemistry</u>
<u>Atomic Structure</u>
- Reading a Periodic Table
- Using Dimensional Analysis
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
<h3>
Explanation:</h3>
<u>Step 1: Define</u>
3.00 × 10²³ molecules F₂
<u>Step 2: Identify Conversions</u>
Avogadro's Number
Molar Mass of F₂ (Diatomic) - 38.00 g/mol
<u>Step 3: Convert</u>
- Set up:
![\displaystyle 3.00 \cdot 10^{23} \ molecules \ F_2(\frac{1 \ mol \ F_2}{6.022 \cdot 10^{23} \ molecules \ F_2})(\frac{38.00 \ g \ F_2}{1 \ mol F_2})](https://tex.z-dn.net/?f=%5Cdisplaystyle%203.00%20%5Ccdot%2010%5E%7B23%7D%20%5C%20molecules%20%5C%20F_2%28%5Cfrac%7B1%20%5C%20mol%20%5C%20F_2%7D%7B6.022%20%5Ccdot%2010%5E%7B23%7D%20%5C%20molecules%20%5C%20F_2%7D%29%28%5Cfrac%7B38.00%20%5C%20g%20%5C%20F_2%7D%7B1%20%5C%20mol%20F_2%7D%29)
- Multiply:
![\displaystyle 18.9306 \ g \ F_2](https://tex.z-dn.net/?f=%5Cdisplaystyle%2018.9306%20%5C%20g%20%5C%20F_2)
<u>Step 4: Check</u>
<em>Follow sig fig rules and round. We are given 3 sig figs.</em>
18.9306 g F₂ ≈ 18.9 g F₂