MgCl2 i believe is the formula
<h3>
Answer:</h3>
12.4 g N₂O₂
<h3>
General Formulas and Concepts:</h3>
<u>Chemistry</u>
<u>Atomic Structure</u>
- Reading a Periodic Table
- Moles
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
<u>Stoichiometry</u>
- Using Dimensional Analysis
<h3>
Explanation:</h3>
<u>Step 1: Define</u>
[Given] 1.24 × 10²³ molecules N₂O₂
[Solve] grams N₂O₂
<u>Step 2: Identify Conversions</u>
Avogadro's Number
[PT] Molar Mass of N - 14.01 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of N₂O₂ - 2(14.01) + 2(16.00) = 60.02 g/mol
<u>Step 3: Convert</u>
- [DA] Set up:

- [DA] Divide/Multiply [Cancel out units]:

<u>Step 4: Check</u>
<em>Follow sig fig rules and round. We are given 3 sig figs.</em>
12.3588 g N₂O₂ ≈ 12.4 g N₂O₂
Answer:
Lower the temperature of the solution
Something moving. Change in temperature.