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stealth61 [152]
2 years ago
8

Please help!

Chemistry
1 answer:
babymother [125]2 years ago
7 0

Answer: 10.7 moles

Explanation: Hydrogen gas exists as a diatomic gas (H2) Hence, the Molar mass of one mole of hydrogen gas is 1 x 2 = 2 g. To find the number of moles from the mass take the weight and divide is by the molar mass of the molecule. So in this case, 21.4/2 = 10.7 moles

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a 5.00 L sample of helium expands to 12.0 L at which point the pressure is measured to be 0.720atm. what was the original pressu
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Answer:

The answer to your question is  Pressure 1 = 1.73 atm

Explanation:

Data

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