Haze is caused by particulate matter from incomplete combustion of car, truck, bus, burning of gasoline and diesel. This could also be caused by the buning of wood, coal, and heating oils from industry, electical generation plants that do not collect some of the pollutants at the smoke stack or exhaust points.
It is the transition metals because the first element ever synthed was technetium, but surely you've googled this by now. ;)
The formula of the product when Br2 reacts with 3L of F2 to completion and produce 2 L of the product is
2 BrF3
Br2 +3F2 = 2BrF3
1 mole of Br reacted 3 moles of f2 to form 2 moles of BrF3
Answer:
Explanation:
<u>1. Oxidation half-reaction (given)</u>
- 2S₂O₃²⁻ (aq) → S₄O₆²⁻ + 2e⁻
<u>2. Reduction half-reaction:</u>
Reduction is the gain of electrons with the consequent reduction in the number of oxidation.
The starting reactant is iodine which is diatomic; thus, it is I₂.
Each iodine atom gains one electron; thus, in total 2 electrons are gained and each I atom in solution will become an I⁻ anion.
Half-reaction:
- I₂ (aq) + 2e⁻ → 2I⁻(aq) ↔ answer
The overall reaction of thiosulfate anion with iodine is obtained when you add the two half-reactions:
- 2S₂O₃²⁻ (aq) → S₄O₆²⁻ + 2e⁻
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(the electrons are canceled)
- 2S₂O₃²⁻ (aq) + I₂ (aq) → S₄O₆²⁻ + 2I⁻(aq)
The answer is (4). You may recall the term "radiometric dating," which refers to the dating of old artifacts by measuring proportions of certain radioactive isotopes they contain and making calculations based on their estimated half-lives. Geological formations are dated in this way.