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Hello!</h2>
The answer is: Charle's Law.
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Why?</h2>
The law that states that the volume and absolute temperature of a fixed quantity of gas (ideal gas) are proportional under constant pressure is the Charle's Law, also known as the law of volumes.
The law describes how a gas kept under constant pressure tends to expand when the temperature increases and it's described by the following equation:

Where,

Also, to describe the relationship between two differents volumes at different temperatures, we have:

Where,

Have a nice day!
Answer:
you divide 71.5 by 2
Explanation:
it's may look intimidating but the question is actually really simple.
Answer: The beginning stage you decide to depict the area, or position, of an object.
Explanation: starting point or position
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Very simply, you get twice as much Hydrogen as Oxygen, because the chemical formula is H2O, meaning two hydrogen atoms bonded to one oxygen atom.