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Need help asap please :) Part A - Calculate the mass of water produced when 7.78 g of butane reacts with excess oxygen. Express your

Need help asap please :)

Part A - Calculate the mass of water produced when 7.78 g of butane reacts with excess oxygen. Express your answer to three significant figures and include the appropriate units.

Part B - Calculate the mass of butane needed to produce 57.2 g of carbon dioxide. Express your answer to three significant figures and include the appropriate units.

Thank you!

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