Row 6 - it’s called Rare earth elements
found in lanthanide series.
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C.) Natural Disaster is Independent of that!
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Answer:
The reaction is exothermic
Explanation:
The phenomenom described can be a result of an exothermic reaction.
Chemical reactions offen exchange energy with the enviroment, they can either:
- Release heat to the enviroment and increase its temperature. (<em>Exothermic reactions</em>)
- Absorb heat from the enviroment and decrease its temperature. (<em>Endothermic reactions</em>)
Following the principles of Le Chatellier, the first ones will be benefited by low temperatures, because the reaction will try to reverse that and move the equilibrium to the products (releasing heat).
On the other side, endothermic reactions will be benefited by high temperatures because the reaction will try to reverse that and move the equilibrium to the products (absorbing heat).
Being all that said, the behavior described is the one of an exothermic reaction: having a higher yield in low temperatures (winter) than in high temperatures (summer).
Reaction
SiCl₄+ 2Mg ⇒ Si + 2MgCl₂
to find limiting reagents: divide the number of moles by their coefficients
SiCl₄ = 1 mole : 1 (coefficient) = 1
Mg = 5 mole : 2 (coefficient) = 2.5
SiCl₄ as a limiting reactant (smaller), and Mg as an excess
then all the compounds involved in the reaction are based on moles of SiCl₄
Si produced =
Reacted Mg (excess) = 2/1 x 1 = 2 mole
mole Mg remaining = 5 - 2 = 3 mole
Answer:
think what you mean is that metal FEELS colder than wood if they're both at room temperature. That's because metal conducts heat much better than wood does. Since your hand is hotter than room temperature, both the metal and the wood conduct heat away from it.
