Atomic mass of bromine is 80 g. The mass of four moles of molecular bromine (Br₂) is:

80 g

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640 g

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40 g

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320 g

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Solution

The correct option is B
640 g

Mass of one mole of Br₂is 160 g.

Hence mass of four moles of molecular bromine is 4 X 160 = 640 g.

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