Answer:
Mercury
Chemical element
Symbol: Hg
Explanation:
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Answer: The final volume decrease with an increase in pressure at constant temperature
Explanation:
According to Boyle's law, pressure of a gas is inversely proportional to the volume of a gas at constant temperature and constant number of moles.

where,
= let initial pressure of gas = p
= final pressure of gas = 2p
= initial volume of gas = v
= final volume of gas = ?
Now put all the given values in the above equation, we get:


Thus the final volume decrease with an increase in pressure at constant temperature
The reducing agent will go through oxidation reaction and lose electrons then the valence will increase. So the reducing agent in this reaction is Sn(s).
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