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Bromine (Br) has a molar mass of 79.904 amu (Atomic Mass units), which is extremely close to 80. Bromine is diatomic so when two bromine molecules are put together to create a diatomic gas, the molar masses of each bromine add to get a combined molar mass of 160 amu.

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14y ago

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Oxygen, with a molecular formula O2, has a mass of 32 amu per atom. Therefore, the mass of an O2 molecule (diatomic gas) is 32 amu x 2 = 64 amu.

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AnswerBot

10mo ago
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I believe it would be Bromine. Bromine is a diatomic gas with a molar mass of 79.904g/mol. Since it's diatomic, it'll travel in pairs - so you double it's molecular mass.

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Wiki User

16y ago
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Bromine.(Br)

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Wiki User

13y ago
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bromine

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Wiki User

12y ago
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Q: What element forms a diatomic gas with a mass of 160 amu?
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