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Kobotan [32]
3 years ago
12

A large weather balloon filled with helium has a volume of 7.00 x 102 L at STP. Which expression should be used to find the mass

of helium in the balloon?
Chemistry
1 answer:
balandron [24]3 years ago
7 0

Answer:

mass of Helium = mole of Helium x Molarmass of Helium

Explanation:

Mole of Helium = volume of Helium/ 22.4dm^3/mol

                          = 7.00 x 10^2/22.4

                          = 31.25mol

Mass of Helium = mole of Helium x Molarmass of Helium

                           = 31.25mol x 4g/mol

                           = 125g

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Knowing the volume of a gas at standard temperature and pressure (STP) we may calculate the number of moles of the gas using the following formula:

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number of moles of gas = 7.3 (L) / 22.4 (L /mole)

number of moles of gas = 0.326 moles

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Arte-miy333 [17]

Answer:

m=22.3\ kg

Explanation:

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