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3 Chemistry Problems Need Help!

1.)A flask contains 0.400 mol of liquid bromine, rm Br_2. Determine thenumber of bromine molecules presentin the flask.2.) Calculate the mass of 1.00 (aseptillion) molecules of water.3.) The fuel used in many disposable lighters is liquidbutane, rm C_4H_{10}. How many carbon atoms are in 1.00 g of butane?

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