D. Anthracite is the correct answer I’m 95% sure
Answer:
It's not the same, due to the fact that Substance B has a medium attraction and Substance C has a low attraction
Explanation:
Of heating. Or when the lake is exposed to boil because of the temperature.
Answer:
514 kJ
General Formulas and Concepts:
<u>Atomic Structure</u>
- Reading a Periodic Table
- Elements
- Compounds
- Moles
<u>Stoichiometry</u>
- Analyzing Reactions rxn
- Using Dimensional Analysis
Explanation:
<u>Step 1: Define</u>
<em>Identify</em>
[Given] rxn (balanced): 2Si (s) + 2Cl₂ → 2SiCl₂ (g) + 687 kJ
[Given] 106 g Cl₂
[Solve] kJ heat
<u>Step 2: Identify Conversions</u>
[rxn] 2 mol Cl₂ → 687 kJ
[PT] Molar Mass of Cl: 35.45 g/mol
Molar Mass of Cl₂: 2(35.45) = 70.9 g/mol
<u>Step 3: Stoichiometry</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>
513.554 kJ ≈ 514 kJ
Topic: AP Chemistry
Unit: Thermochemistry