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assuming you have o.4g of Y(OH)3, calculate the mass of BaO2 required to react stoichiometrically to produce YBa2Cu3O7. Now calculate the mass of CuO.

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Write the balanced equation. Then, calculate the moles of Y hydroxide from .4 g. Then, notice from the balanced equation how many moles of Barium oxide will be required, and convert that to grams.

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