Questions from General Chemistry


Q: Lead(II) oxide from an ore can be reduced to

Lead(II) oxide from an ore can be reduced to elemental lead by heating in a furnace with carbon. PbO(s) + C(s) Pb(l) + CO(g) Calculate the expected yield of lead if 50.0 kg of lead...

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Q: If steel wool (iron) is heated until it glows and

If steel wool (iron) is heated until it glows and is placed in a bottle containing pure oxygen, the iron reacts spectacularly to produce iron(III) oxide. Fe(s) + O2(g) Fe2O3(s)...

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Q: A common method for determining how much chloride ion is present in

A common method for determining how much chloride ion is present in a sample is to precipitate the chloride from an aqueous solution of the sample with silver nitrate solution and then to weigh the si...

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Q: Although many sulfate salts are soluble in water, calcium sulfate is

Although many sulfate salts are soluble in water, calcium sulfate is not (Table 7.1). Therefore, a solution of calcium chloride will react with sodium sulfate solution to produce a precipitate of calc...

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Q: A compound was analyzed and was found to contain the following percentages

A compound was analyzed and was found to contain the following percentages of the elements by mass: barium, 89.56%; oxygen, 10.44%. Determine the empirical formula of the compound.

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Q: A compound was analyzed and was found to contain the following percentages

A compound was analyzed and was found to contain the following percentages of the elements by mass: nitrogen, 11.64%; chlorine, 88.36%. Determine the empirical formula of the compound.

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Q: A 0.5998-g sample of a new compound has

A 0.5998-g sample of a new compound has been analyzed and found to contain the following masses of elements: carbon, 0.2322 g; hydrogen, 0.05848 g; oxygen, 0.3091 g. Calculate the empirical formula of...

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Q: For each of the following reactions, give the balanced chemical equation

For each of the following reactions, give the balanced chemical equation for the reaction and state the meaning of the equation in terms of individual molecules and in terms of moles of molecules. a....

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Q: A compound was analyzed and was found to contain the following percentages

A compound was analyzed and was found to contain the following percentages of the elements by mass: boron, 78.14%; hydrogen, 21.86%. Determine the empirical formula of the compound.

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Q: If a 1.271-g sample of aluminum metal is

If a 1.271-g sample of aluminum metal is heated in a chlorine gas atmosphere, the mass of aluminum chloride produced is 6.280 g. Calculate the empirical formula of aluminum chloride.

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