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12. Two chemicals react in a sealed flask to produce a solid and a gas. The mass of the reactants is 140.0 g; the mass of the solid in the products is 137.0 g. What is the mass of the gas produced?

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12. Two chemicals react in a sealed flask to produce a solid and a gas. The mass of the reactants is...

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12. Two chemicals react in a sealed flask to produce a solid and a gas. The mass of the reactants is 140.0 g; the mass of the solid in the products is 137.0 g. What is the mass of the gas produced?​

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12. Two chemicals react in a sealed flask to produce a solid and a gas. The mass of the reactants is 140.0 g; the mass of the solid in the products is 137.0 g. What is the mass of the gas produced?